Add missing @Override annotations

git-svn-id: http://google-refine.googlecode.com/svn/trunk@2171 7d457c2a-affb-35e4-300a-418c747d4874

README.txt

@@ -52,8 +52,14 @@ This is the full list of contributors (in chronological order):
  - Iain Sproat <iainsproat@gmail.com>
  - Tom Morris <tfmorris@gmail.com>
  - Heather Campbell <campbellh@google.com>
-
+ - Thad Guidry <thadguidry@gmail.com>
-
+ - Paul Makepeace <paulm@paulm.com>
+ - Tomaž Šolc <tomaz.solc@zemanta.com>
+ - Gabriel Sjoberg <GabrielSjoberg@gmail.com>
+ - Rod Salazar <rodrod.salazar@gmail.com>
+ - pxb <pxb1988@gmail.com>
+ 
+ We welcome additional contributors if you'd like to help out.
                                 - o -
 
 

extensions/freebase/src/com/google/refine/freebase/FreebaseTopic.java

@@ -49,6 +49,7 @@ public class FreebaseTopic implements Jsonizable {
         this.name = name;
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         

extensions/freebase/src/com/google/refine/freebase/FreebaseType.java

@@ -46,6 +46,7 @@ public class FreebaseType extends FreebaseTopic implements Jsonizable {
         super(id, name);
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

extensions/freebase/src/com/google/refine/freebase/ProtographTransposeExporter.java

@@ -54,6 +54,7 @@ abstract public class ProtographTransposeExporter implements WriterExporter {
 		_contentType = contentType;
 	}
 	
+    @Override
     public String getContentType() {
         return "application/x-unknown";
     }
@@ -67,6 +68,7 @@ abstract public class ProtographTransposeExporter implements WriterExporter {
         throw new RuntimeException("Not implemented");
     }
     
+    @Override
     public void export(Project project, Properties options, Engine engine,
             Writer writer) throws IOException {
         

extensions/freebase/src/com/google/refine/freebase/commands/auth/CheckAuthorizationCommand.java

@@ -52,6 +52,7 @@ public class CheckAuthorizationCommand extends Command {
     
     final static Logger logger = LoggerFactory.getLogger("check-authorization_command");
     
+    @Override
     public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         
         try {

extensions/freebase/src/com/google/refine/freebase/expr/MqlKeyQuote.java

@@ -53,6 +53,7 @@ public class MqlKeyQuote implements Function {
     final static private Pattern fullValidKeyPattern = Pattern.compile(fullValidKey);
     final static private Pattern keyCharMustQuotePattern = Pattern.compile(keyCharMustQuote);
     
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1) {
             Object o1 = args[0];
@@ -63,6 +64,7 @@ public class MqlKeyQuote implements Function {
         return null;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

extensions/freebase/src/com/google/refine/freebase/expr/MqlKeyUnquote.java

@@ -45,6 +45,7 @@ import com.google.refine.grel.Function;
 public class MqlKeyUnquote implements Function {
     final static private Pattern quotedCharPattern = Pattern.compile("\\$([0-9A-Fa-f]{4})");
     
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1) {
             Object o1 = args[0];
@@ -75,6 +76,7 @@ public class MqlKeyUnquote implements Function {
         return null;
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

extensions/freebase/src/com/google/refine/freebase/model/changes/DataExtensionChange.java

@@ -126,6 +126,7 @@ public class DataExtensionChange implements Change {
         _newRows = newRows;
     }
 
+    @Override
     public void apply(Project project) {
         synchronized (project) {
             if (_firstNewCellIndex < 0) {
@@ -257,6 +258,7 @@ public class DataExtensionChange implements Change {
         }
     }
 
+    @Override
     public void revert(Project project) {
         synchronized (project) {
             project.rows.clear();
@@ -270,6 +272,7 @@ public class DataExtensionChange implements Change {
         }
     }
 
+    @Override
     public void save(Writer writer, Properties options) throws IOException {
         writer.write("baseColumnName="); writer.write(_baseColumnName); writer.write('\n');
         writer.write("columnInsertIndex="); writer.write(Integer.toString(_columnInsertIndex)); writer.write('\n');

extensions/freebase/src/com/google/refine/freebase/model/recon/DataExtensionReconConfig.java

@@ -80,6 +80,7 @@ public class DataExtensionReconConfig extends StrictReconConfig {
         throw new RuntimeException(WARN);
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options) throws JSONException {
         writer.object();
         writer.key("mode"); writer.value("extend");

extensions/freebase/src/com/google/refine/freebase/model/recon/GuidBasedReconConfig.java

@@ -69,6 +69,7 @@ public class GuidBasedReconConfig extends StrictReconConfig {
     static protected class GuidBasedReconJob extends ReconJob {
         String guid;
         
+        @Override
         public int getKey() {
             return guid.hashCode();
         }
@@ -102,6 +103,7 @@ public class GuidBasedReconConfig extends StrictReconConfig {
         return "Reconcile cells in column " + columnName + " as Freebase IDs";
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         

extensions/freebase/src/com/google/refine/freebase/model/recon/IdBasedReconConfig.java

@@ -69,6 +69,7 @@ public class IdBasedReconConfig extends StrictReconConfig {
     static protected class IdBasedReconJob extends ReconJob {
         String id;
         
+        @Override
         public int getKey() {
             return id.hashCode();
         }
@@ -106,6 +107,7 @@ public class IdBasedReconConfig extends StrictReconConfig {
         return "Reconcile cells in column " + columnName + " as Freebase IDs";
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         

extensions/freebase/src/com/google/refine/freebase/model/recon/KeyBasedReconConfig.java

@@ -80,6 +80,7 @@ public class KeyBasedReconConfig extends StrictReconConfig {
     static protected class KeyBasedReconJob extends ReconJob {
         String key;
         
+        @Override
         public int getKey() {
             return key.hashCode();
         }
@@ -106,6 +107,7 @@ public class KeyBasedReconConfig extends StrictReconConfig {
         return "Reconcile cells in column " + columnName + " to topics with keys in namespace " + namespace.id;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         

extensions/freebase/src/com/google/refine/freebase/oauth/FreebaseProvider.java

@@ -50,14 +50,17 @@ public class FreebaseProvider extends Provider {
         super(host);
     }
     
+    @Override
     public String getRequestTokenServiceURL() {
         return "https://" + host + "/api/oauth/request_token";
     }
 
+    @Override
     public String getAccessTokenServiceURL() {
         return "https://" + host + "/api/oauth/access_token";
     }
 
+    @Override
     public String getUserAuthorizationURL() {
         return "https://" + host + "/signin/app";
     }

extensions/freebase/src/com/google/refine/freebase/oauth/FreebaseTimeCommonsHttpOAuthConsumer.java

@@ -72,6 +72,7 @@ public class FreebaseTimeCommonsHttpOAuthConsumer extends CommonsHttpOAuthConsum
      * NOTE: this call is potentially vulnerable to a man-in-the-middle (MITM) attack, but the same
      * could be said if we used an NTP client.
      */
+    @Override
     protected String generateTimestamp() {
         
         long time = -1;

extensions/freebase/src/com/google/refine/freebase/operations/ExtendDataOperation.java

@@ -96,6 +96,7 @@ public class ExtendDataOperation extends EngineDependentOperation {
         _columnInsertIndex = columnInsertIndex;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         
@@ -109,6 +110,7 @@ public class ExtendDataOperation extends EngineDependentOperation {
         writer.endObject();
     }
 
+    @Override
     protected String getBriefDescription(Project project) {
         return "Extend data at index " + _columnInsertIndex + 
             " based on column " + _baseColumnName;
@@ -120,6 +122,7 @@ public class ExtendDataOperation extends EngineDependentOperation {
             " by filling " + cellsAtRows.size();
     }
     
+    @Override
     public Process createProcess(Project project, Properties options) throws Exception {
         return new ExtendDataProcess(
             project, 
@@ -148,6 +151,7 @@ public class ExtendDataOperation extends EngineDependentOperation {
             _job = new FreebaseDataExtensionJob(_extension);
         }
         
+        @Override
         public void write(JSONWriter writer, Properties options)
                 throws JSONException {
             
@@ -160,6 +164,7 @@ public class ExtendDataOperation extends EngineDependentOperation {
             writer.endObject();
         }
         
+        @Override
         protected Runnable getRunnable() {
             return this;
         }
@@ -194,6 +199,7 @@ public class ExtendDataOperation extends EngineDependentOperation {
                 	// nothing to do
                 }
                 
+                @Override
                 public boolean visit(Project project, int rowIndex, Row row) {
                     Cell cell = row.getCell(_cellIndex);
                     if (cell != null && cell.recon != null && cell.recon.match != null) {
@@ -246,6 +252,7 @@ public class ExtendDataOperation extends EngineDependentOperation {
             return end;
         }
         
+        @Override
         public void run() {
             List<Integer> rowIndices = new ArrayList<Integer>();
             List<DataExtension> dataExtensions = new ArrayList<DataExtension>();

extensions/freebase/src/com/google/refine/freebase/operations/ImportQADataOperation.java

@@ -64,6 +64,7 @@ public class ImportQADataOperation extends AbstractOperation {
     public ImportQADataOperation() {
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         

extensions/freebase/src/com/google/refine/freebase/operations/SaveProtographOperation.java

@@ -64,6 +64,7 @@ public class SaveProtographOperation extends AbstractOperation {
         _protograph = protograph;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     
@@ -74,6 +75,7 @@ public class SaveProtographOperation extends AbstractOperation {
         writer.endObject();
     }
 
+    @Override
     protected String getBriefDescription(Project project) {
         return "Save schema alignment skeleton";
     }
@@ -93,6 +95,7 @@ public class SaveProtographOperation extends AbstractOperation {
             _newProtograph = protograph;
         }
         
+        @Override
         public void apply(Project project) {
             synchronized (project) {
                 _oldProtograph = (Protograph) project.overlayModels.get("freebaseProtograph");
@@ -101,6 +104,7 @@ public class SaveProtographOperation extends AbstractOperation {
             }
         }
         
+        @Override
         public void revert(Project project) {
             synchronized (project) {
                 if (_oldProtograph == null) {
@@ -111,6 +115,7 @@ public class SaveProtographOperation extends AbstractOperation {
             }
         }
         
+        @Override
         public void save(Writer writer, Properties options) throws IOException {
             writer.write("newProtograph="); writeProtograph(_newProtograph, writer); writer.write('\n');
             writer.write("oldProtograph="); writeProtograph(_oldProtograph, writer); writer.write('\n');

extensions/freebase/src/com/google/refine/freebase/protograph/AnonymousNode.java

@@ -50,6 +50,7 @@ public class AnonymousNode implements Node, NodeWithLinks {
         this.type = type;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         
@@ -66,14 +67,17 @@ public class AnonymousNode implements Node, NodeWithLinks {
         writer.endObject();
     }
 
+    @Override
     public void addLink(Link link) {
         links.add(link);
     }
     
+    @Override
     public Link getLink(int index) {
         return links.get(index);
     }
 
+    @Override
     public int getLinkCount() {
         return links.size();
     }

extensions/freebase/src/com/google/refine/freebase/protograph/CellKeyNode.java

@@ -49,6 +49,7 @@ public class CellKeyNode extends CellNode {
         this.namespace = namespace;
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

extensions/freebase/src/com/google/refine/freebase/protograph/CellTopicNode.java

@@ -52,6 +52,7 @@ public class CellTopicNode extends CellNode implements NodeWithLinks {
         this.type = type;
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 
@@ -77,14 +78,17 @@ public class CellTopicNode extends CellNode implements NodeWithLinks {
         writer.endObject();
     }
 
+    @Override
     public void addLink(Link link) {
         links.add(link);
     }
 
+    @Override
     public Link getLink(int index) {
         return links.get(index);
     }
 
+    @Override
     public int getLinkCount() {
         return links.size();
     }

extensions/freebase/src/com/google/refine/freebase/protograph/CellValueNode.java

@@ -50,6 +50,7 @@ public class CellValueNode extends CellNode {
         this.lang = lang;
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

extensions/freebase/src/com/google/refine/freebase/protograph/FreebaseTopicNode.java

@@ -50,6 +50,7 @@ public class FreebaseTopicNode implements Node, NodeWithLinks {
         this.topic = topic;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         
@@ -67,14 +68,17 @@ public class FreebaseTopicNode implements Node, NodeWithLinks {
         writer.endObject();
     }
 
+    @Override
     public void addLink(Link link) {
         links.add(link);
     }
     
+    @Override
     public Link getLink(int index) {
         return links.get(index);
     }
 
+    @Override
     public int getLinkCount() {
         return links.size();
     }

extensions/freebase/src/com/google/refine/freebase/protograph/Link.java

@@ -62,6 +62,7 @@ public class Link implements Jsonizable {
         return target;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
 

extensions/freebase/src/com/google/refine/freebase/protograph/Protograph.java

@@ -186,6 +186,7 @@ public class Protograph implements OverlayModel {
         );
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options) throws JSONException {
         writer.object();
         writer.key("rootNodes"); writer.array();

extensions/freebase/src/com/google/refine/freebase/protograph/ValueNode.java

@@ -49,6 +49,7 @@ public class ValueNode implements Node {
         this.lang = lang;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         

extensions/freebase/src/com/google/refine/freebase/protograph/transpose/MqlwriteLikeTransposedNodeFactory.java

@@ -102,6 +102,7 @@ public class MqlwriteLikeTransposedNodeFactory implements TransposedNodeFactory
         
         protected JSONObject obj;
         
+        @Override
         public Object getJSON() {
             return getJSONObject();
         }
@@ -122,6 +123,7 @@ public class MqlwriteLikeTransposedNodeFactory implements TransposedNodeFactory
             this.node = node;
         }
 
+        @Override
         public JSONObject getJSONObject() {
             if (obj == null) {
                 obj = new JSONObject();
@@ -182,6 +184,7 @@ public class MqlwriteLikeTransposedNodeFactory implements TransposedNodeFactory
             this.cell = cell;
         }
 
+        @Override
         public Object getJSON() {
             if (obj == null) {
                 obj = new JSONObject();
@@ -212,6 +215,7 @@ public class MqlwriteLikeTransposedNodeFactory implements TransposedNodeFactory
             this.cell = cell;
         }
 
+        @Override
         public Object getJSON() {
             if (obj == null) {
                 obj = new JSONObject();
@@ -260,6 +264,7 @@ public class MqlwriteLikeTransposedNodeFactory implements TransposedNodeFactory
             this.node = node;
         }
 
+        @Override
         public Object getJSON() {
             if (obj == null) {
                 obj = new JSONObject();
@@ -278,6 +283,7 @@ public class MqlwriteLikeTransposedNodeFactory implements TransposedNodeFactory
             return obj;
         }
     }    
+    @Override
     public TransposedNode transposeAnonymousNode(
             TransposedNode parentNode,
             Link link, 
@@ -290,6 +296,7 @@ public class MqlwriteLikeTransposedNodeFactory implements TransposedNodeFactory
         );
     }
 
+    @Override
     public TransposedNode transposeCellNode(
             TransposedNode parentNode,
             Link link, 
@@ -313,6 +320,7 @@ public class MqlwriteLikeTransposedNodeFactory implements TransposedNodeFactory
         return tnode;
     }
 
+    @Override
     public TransposedNode transposeTopicNode(
             TransposedNode parentNode,
             Link link, 
@@ -325,6 +333,7 @@ public class MqlwriteLikeTransposedNodeFactory implements TransposedNodeFactory
         return tnode;
     }
 
+    @Override
     public TransposedNode transposeValueNode(
             TransposedNode parentNode,
             Link link, 

extensions/freebase/src/com/google/refine/freebase/protograph/transpose/TripleLoaderTransposedNodeFactory.java

@@ -349,6 +349,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
         
         //protected AnonymousTransposedNode(AnonymousNode node) { }
         
+        @Override
         public Object internalWrite(String subject, String predicate, Project project, int subjectRowIndex, int subjectCellIndex, Cell subjectCell) {
             if (children.size() == 0 || subject == null) {
                 return null;
@@ -431,6 +432,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
             this.cell = cell;
         }
         
+        @Override
         public Object internalWrite(String subject, String predicate, Project project, int subjectRowIndex, int subjectCellIndex, Cell subjectCell) {
             String id = null;
             if (cell.recon != null && cell.recon.judgment != Recon.Judgment.None) {
@@ -505,6 +507,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
             this.cell = cell;
         }
         
+        @Override
         public Object internalWrite(String subject, String predicate, Project project, int subjectRowIndex, int subjectCellIndex, Cell subjectCell) {
             Object value = cell.value;
             if (value != null) {
@@ -541,6 +544,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
             this.cell = cell;
         }
         
+        @Override
         public Object internalWrite(String subject, String predicate, Project project, int subjectRowIndex, int subjectCellIndex, Cell subjectCell) {
             writeLine(subject, "key", node.namespace.id + "/" + cell.value, project, 
                 subjectRowIndex, subjectCellIndex, subjectCell, 
@@ -557,6 +561,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
             this.node = node;
         }
 
+        @Override
         public Object internalWrite(String subject, String predicate, Project project, int subjectRowIndex, int subjectCellIndex, Cell subjectCell) {
             writeLine(subject, predicate, node.topic.id, project, 
                 subjectRowIndex, subjectCellIndex, subjectCell, 
@@ -575,6 +580,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
             this.node = node;
         }
 
+        @Override
         public Object internalWrite(String subject, String predicate, Project project, int subjectRowIndex, int subjectCellIndex, Cell subjectCell) {
             Object value = node.value;
             if (value != null) {
@@ -597,6 +603,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
         }
     }
     
+    @Override
     public TransposedNode transposeAnonymousNode(
             TransposedNode parentNode,
             Link link, 
@@ -620,6 +627,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
         return tnode;
     }
 
+    @Override
     public TransposedNode transposeCellNode(
             TransposedNode parentNode,
             Link link, 
@@ -662,6 +670,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
         return tnode;
     }
 
+    @Override
     public TransposedNode transposeTopicNode(
             TransposedNode parentNode,
             Link link, 
@@ -686,6 +695,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
         return tnode;
     }
 
+    @Override
     public TransposedNode transposeValueNode(
             TransposedNode parentNode,
             Link link, 

extensions/gdata/src/com/google/refine/extension/gdata/AuthorizeCommand.java

@@ -15,6 +15,7 @@ import com.google.refine.commands.Command;
  */
 public class AuthorizeCommand extends Command {
 
+    @Override
     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
 

extensions/gdata/src/com/google/refine/extension/gdata/AuthorizeCommand2.java

@@ -16,6 +16,7 @@ import com.google.refine.commands.Command;
  */
 public class AuthorizeCommand2 extends Command {
 
+    @Override
     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
 

extensions/gdata/src/com/google/refine/extension/gdata/DeAuthorizeCommand.java

@@ -11,6 +11,7 @@ import com.google.refine.commands.Command;
 
 public class DeAuthorizeCommand extends Command {
 
+    @Override
     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
 

extensions/jython/src/com/google/refine/jython/JythonEvaluable.java

@@ -58,6 +58,7 @@ public class JythonEvaluable implements Evaluable {
     static public LanguageSpecificParser createParser() {
         return new LanguageSpecificParser() {
             
+            @Override
             public Evaluable parse(String s) throws ParsingException {
                 return new JythonEvaluable(s);
             }
@@ -108,6 +109,7 @@ public class JythonEvaluable implements Evaluable {
         _engine.exec(sb.toString());
     }
     
+    @Override
     public Object evaluate(Properties bindings) {
         try {
             // call the temporary PyFunction directly

extensions/jython/src/com/google/refine/jython/JythonHasFieldsWrapper.java

@@ -52,6 +52,7 @@ public class JythonHasFieldsWrapper extends PyObject {
         _bindings = bindings;
     }
 
+    @Override
     public PyObject __finditem__(PyObject key) {
         String k = (String) key.__tojava__(String.class);
         Object v = _obj.getField(k, _bindings);

extensions/jython/src/com/google/refine/jython/JythonObjectWrapper.java

@@ -44,6 +44,7 @@ public class JythonObjectWrapper extends PyObject {
         _obj = obj;
     }
 
+    @Override
     public String toString() {
         return _obj.getClass().getSimpleName();
     }

main/src/com/google/refine/ProjectManager.java

@@ -268,6 +268,7 @@ public abstract class ProjectManager {
         
         if (records.size() > 0) {
             Collections.sort(records, new Comparator<SaveRecord>() {
+                @Override
                 public int compare(SaveRecord o1, SaveRecord o2) {
                     if (o1.overdue < o2.overdue) {
                         return 1;

main/src/com/google/refine/ProjectMetadata.java

@@ -76,6 +76,7 @@ public class ProjectMetadata implements Jsonizable {
         preparePreferenceStore(_preferenceStore);
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
 

main/src/com/google/refine/RefineServlet.java

@@ -83,6 +83,7 @@ public class RefineServlet extends Butterfly {
     static final protected long s_autoSavePeriod = 1000 * 60 * 5; // 5 minutes
     
     static protected class AutoSaveTimerTask extends TimerTask {
+        @Override
         public void run() {
             try {
                 ProjectManager.singleton.save(false); // quick, potentially incomplete save

main/src/com/google/refine/browsing/DecoratedValue.java

@@ -56,6 +56,7 @@ public class DecoratedValue implements Jsonizable {
         this.label = label;
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         writer.object();

main/src/com/google/refine/browsing/Engine.java

@@ -231,6 +231,7 @@ public class Engine implements Jsonizable {
     	}
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         

main/src/com/google/refine/clustering/knn/kNNClusterer.java

@@ -123,6 +123,7 @@ public class kNNClusterer extends Clusterer {
         	// nothing to do
         }
         
+        @Override
         public boolean visit(Project project, int rowIndex, Row row) {
             Cell cell = row.getCell(_colindex);
             if (cell != null && cell.value != null) {
@@ -174,6 +175,7 @@ public class kNNClusterer extends Clusterer {
         	// nothing to do
         }
         
+        @Override
         public boolean visit(Project project, int rowIndex, Row row) {
             Cell cell = row.getCell(_colindex);
             if (cell != null && cell.value != null) {
@@ -190,11 +192,13 @@ public class kNNClusterer extends Clusterer {
         }
     }
         
+    @Override
     public void initializeFromJSON(Project project, JSONObject o) throws Exception {
         super.initializeFromJSON(project, o);
         _distance = _distances.get(o.getString("function").toLowerCase());
     }
 
+    @Override
     public void computeClusters(Engine engine) {
         //VPTreeClusteringRowVisitor visitor = new VPTreeClusteringRowVisitor(_distance,_config);
         BlockingClusteringRowVisitor visitor = new BlockingClusteringRowVisitor(_distance,_config);
@@ -206,11 +210,13 @@ public class kNNClusterer extends Clusterer {
 
     public static class ValuesComparator implements Comparator<Entry<Serializable,Integer>>, Serializable {
         private static final long serialVersionUID = 204469656070583155L;
+        @Override
         public int compare(Entry<Serializable,Integer> o1, Entry<Serializable,Integer> o2) {
             return o2.getValue() - o1.getValue();
         }
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options) throws JSONException {
         writer.array();        
         for (Set<Serializable> m : _clusters) {

main/src/com/google/refine/commands/cell/EditOneCellCommand.java

@@ -136,6 +136,7 @@ public class EditOneCellCommand extends Command {
             this.value = value;
         }
 
+        @Override
         protected HistoryEntry createHistoryEntry(long historyEntryID) throws Exception {
             Cell cell = _project.rows.get(rowIndex).getCell(cellIndex);
             Column column = _project.columnModel.getColumnByCellIndex(cellIndex);

main/src/com/google/refine/commands/recon/GuessTypesOfColumnCommand.java

@@ -243,6 +243,7 @@ public class GuessTypesOfColumnCommand extends Command {
         
         List<TypeGroup> types = new ArrayList<TypeGroup>(map.values());
         Collections.sort(types, new Comparator<TypeGroup>() {
+            @Override
             public int compare(TypeGroup o1, TypeGroup o2) {
                 int c = Math.min(s_sampleSize, o2.count) - Math.min(s_sampleSize, o1.count);
                 if (c != 0) {

main/src/com/google/refine/commands/recon/ReconClearOneCellCommand.java

@@ -118,6 +118,7 @@ public class ReconClearOneCellCommand extends Command {
             this.cellIndex = cellIndex;
         }
 
+        @Override
         protected HistoryEntry createHistoryEntry(long historyEntryID) throws Exception {
             Cell cell = _project.rows.get(rowIndex).getCell(cellIndex);
             if (cell == null || !ExpressionUtils.isNonBlankData(cell.value)) {

main/src/com/google/refine/commands/recon/ReconJudgeOneCellCommand.java

@@ -154,6 +154,7 @@ public class ReconJudgeOneCellCommand extends Command {
             this.schemaSpace = schemaSpace;
         }
 
+        @Override
         protected HistoryEntry createHistoryEntry(long historyEntryID) throws Exception {
             Cell cell = _project.rows.get(rowIndex).getCell(cellIndex);
             if (cell == null || !ExpressionUtils.isNonBlankData(cell.value)) {

main/src/com/google/refine/commands/row/AnnotateOneRowCommand.java

@@ -114,6 +114,7 @@ public class AnnotateOneRowCommand extends Command {
             this.starred = starred;
         }
 
+        @Override
         protected HistoryEntry createHistoryEntry(long historyEntryID) throws Exception {
             return new HistoryEntry(
                 historyEntryID,
@@ -140,6 +141,7 @@ public class AnnotateOneRowCommand extends Command {
             this.flagged = flagged;
         }
 
+        @Override
         protected HistoryEntry createHistoryEntry(long historyEntryID) throws Exception {
             return new HistoryEntry(
                 historyEntryID,

main/src/com/google/refine/commands/row/GetRowsCommand.java

@@ -208,6 +208,7 @@ public class GetRowsCommand extends Command {
             // nothing to do
         }
         
+        @Override
         public boolean visit(Project project, int rowIndex, Row row) {
             if (total >= start && total < start + limit) {
                 internalVisit(project, rowIndex, row);

main/src/com/google/refine/exporters/CsvExporter.java

@@ -84,6 +84,7 @@ public class CsvExporter implements WriterExporter{
                 return this;
             }
 
+            @Override
             public boolean visit(Project project, int rowIndex, Row row) {
                 int size = project.columnModel.columns.size();
 

main/src/com/google/refine/exporters/HtmlTableExporter.java

@@ -92,6 +92,7 @@ public class HtmlTableExporter implements WriterExporter {
                 	// nothing to do
                 }
                 
+                @Override
                 public boolean visit(Project project, int rowIndex, Row row) {
                     try {
                         writer.write("<tr>");

main/src/com/google/refine/expr/functions/Cross.java

@@ -48,6 +48,7 @@ import com.google.refine.model.Project;
 
 public class Cross implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 3) {
             // from project is implied
@@ -74,6 +75,7 @@ public class Cross implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a cell, a project name to join with, and a column name in that project");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/FacetCount.java

@@ -51,6 +51,7 @@ import com.google.refine.model.Project;
 
 public class FacetCount implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 3 && args[1] instanceof String && args[2] instanceof String) {
         	Object choiceValue = args[0]; // choice value to look up
@@ -85,6 +86,7 @@ public class FacetCount implements Function {
         	" expects a choice value, an expression as a string, and a column name");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/Get.java

@@ -48,6 +48,7 @@ import com.google.refine.grel.Function;
 
 public class Get implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length > 1 && args.length <= 3) {
             Object v = args[0];
@@ -164,6 +165,7 @@ public class Get implements Function {
         return null;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/HasField.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class HasField implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length > 1 && args.length <= 2) {
             Object v = args[0];
@@ -65,6 +66,7 @@ public class HasField implements Function {
         return false;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/Jsonize.java

@@ -46,6 +46,7 @@ import com.google.refine.grel.Function;
 
 public class Jsonize implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length >= 1) {
         	try {
@@ -77,6 +78,7 @@ public class Jsonize implements Function {
     }
 
     
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/Length.java

@@ -47,6 +47,7 @@ import com.google.refine.grel.Function;
 
 public class Length implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1) {
             Object v = args[0];
@@ -70,6 +71,7 @@ public class Length implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects an array or a string");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/Slice.java

@@ -46,6 +46,7 @@ import com.google.refine.grel.Function;
 
 public class Slice implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length > 1 && args.length <= 3) {
             Object v = args[0];
@@ -128,6 +129,7 @@ public class Slice implements Function {
         return null;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/ToDate.java

@@ -47,6 +47,7 @@ import com.google.refine.grel.Function;
 
 public class ToDate implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 0) {
             // missing value, can this happen?
@@ -98,6 +99,7 @@ public class ToDate implements Function {
     }
 
 
+    @Override
     public void write(JSONWriter writer, Properties options)
     throws JSONException {
 

main/src/com/google/refine/expr/functions/ToNumber.java

@@ -43,6 +43,7 @@ import com.google.refine.grel.Function;
 
 public class ToNumber implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null) {
             if (args[0] instanceof Number) {
@@ -59,6 +60,7 @@ public class ToNumber implements Function {
         return null;
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/ToString.java

@@ -46,6 +46,7 @@ import com.google.refine.grel.Function;
 
 public class ToString implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length >= 1) {
             Object o1 = args[0];
@@ -71,6 +72,7 @@ public class ToString implements Function {
     }
 
     
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/Type.java

@@ -47,6 +47,7 @@ import com.google.refine.grel.Function;
 
 public class Type implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1) {
             Object v = args[0];
@@ -71,6 +72,7 @@ public class Type implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects one argument");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/arrays/ArgsToArray.java

@@ -42,10 +42,12 @@ import com.google.refine.grel.Function;
 
 public class ArgsToArray implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
     	return args;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/arrays/Join.java

@@ -47,6 +47,7 @@ import com.google.refine.grel.Function;
 
 public class Join implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 2) {
             Object v = args[0];
@@ -99,6 +100,7 @@ public class Join implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects an array and a string");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/arrays/Reverse.java

@@ -48,6 +48,7 @@ import com.google.refine.util.JSONUtilities;
 
 public class Reverse implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1) {
             Object v = args[0];
@@ -86,6 +87,7 @@ public class Reverse implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects an array");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/arrays/Sort.java

@@ -49,6 +49,7 @@ import com.google.refine.util.JSONUtilities;
 
 public class Sort implements Function {
 
+    @Override
     @SuppressWarnings("unchecked")
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1) {
@@ -84,6 +85,7 @@ public class Sort implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects an array");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/arrays/Uniques.java

@@ -50,6 +50,7 @@ import com.google.refine.util.JSONUtilities;
 
 public class Uniques implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1) {
             Object v = args[0];
@@ -84,6 +85,7 @@ public class Uniques implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects an array");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/booleans/And.java

@@ -42,6 +42,7 @@ import com.google.refine.grel.Function;
 
 public class And implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         for (Object o : args) {
             if (!Not.objectToBoolean(o)) {
@@ -51,6 +52,7 @@ public class And implements Function {
         return true;
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         

main/src/com/google/refine/expr/functions/booleans/Not.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Not implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1) {
             return !objectToBoolean(args[0]);
@@ -56,6 +57,7 @@ public class Not implements Function {
             (o instanceof Boolean) ? ((Boolean) o).booleanValue() : Boolean.parseBoolean(o.toString()));
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/booleans/Or.java

@@ -42,6 +42,7 @@ import com.google.refine.grel.Function;
 
 public class Or implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         for (Object o : args) {
             if (Not.objectToBoolean(o)) {
@@ -51,6 +52,7 @@ public class Or implements Function {
         return false;
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/date/DatePart.java

@@ -46,6 +46,7 @@ import com.google.refine.grel.Function;
 
 public class DatePart implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 2 && 
                 args[0] != null && (args[0] instanceof Calendar || args[0] instanceof Date) && 
@@ -91,6 +92,7 @@ public class DatePart implements Function {
         }
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options) throws JSONException {
         writer.object();
         writer.key("description"); writer.value("Returns part of a date");

main/src/com/google/refine/expr/functions/date/Inc.java

@@ -46,6 +46,7 @@ import com.google.refine.grel.Function;
 
 public class Inc implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 3 && 
                 args[0] != null && (args[0] instanceof Calendar || args[0] instanceof Date) && 
@@ -89,6 +90,7 @@ public class Inc implements Function {
         }
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options) throws JSONException {
         writer.object();
         writer.key("description"); writer.value("Returns a date changed by the given amount in the given unit of time");

main/src/com/google/refine/expr/functions/date/Now.java

@@ -43,6 +43,7 @@ import com.google.refine.grel.Function;
 
 public class Now implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 0) {
             return Calendar.getInstance();
@@ -50,6 +51,7 @@ public class Now implements Function {
         return null;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/html/HtmlAttr.java

@@ -45,6 +45,7 @@ import com.google.refine.grel.Function;
 
 public class HtmlAttr implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length >= 2) {
             Object o1 = args[0];
@@ -62,6 +63,7 @@ public class HtmlAttr implements Function {
     }
 
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/html/HtmlText.java

@@ -45,6 +45,7 @@ import com.google.refine.grel.Function;
 
 public class HtmlText implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length >= 1) {
             Object o1 = args[0];
@@ -60,6 +61,7 @@ public class HtmlText implements Function {
     }
 
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/html/InnerHtml.java

@@ -45,6 +45,7 @@ import com.google.refine.grel.Function;
 
 public class InnerHtml implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length >= 1) {
             Object o1 = args[0];
@@ -60,6 +61,7 @@ public class InnerHtml implements Function {
     }
 
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/html/ParseHtml.java

@@ -43,6 +43,7 @@ import com.google.refine.grel.Function;
 
 public class ParseHtml implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length >= 1) {
             Object o1 = args[0];
@@ -54,6 +55,7 @@ public class ParseHtml implements Function {
     }
 
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/html/SelectHtml.java

@@ -45,6 +45,7 @@ import com.google.refine.grel.Function;
 
 public class SelectHtml implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length >= 2) {
             Object o1 = args[0];
@@ -62,6 +63,7 @@ public class SelectHtml implements Function {
     }
 
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/ACos.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class ACos implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return Math.acos(((Number) args[0]).doubleValue());
@@ -51,6 +52,7 @@ public class ACos implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/ASin.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class ASin implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return Math.asin(((Number) args[0]).doubleValue());
@@ -51,6 +52,7 @@ public class ASin implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/ATan.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class ATan implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return Math.atan(((Number) args[0]).doubleValue());
@@ -51,6 +52,7 @@ public class ATan implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/ATan2.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class ATan2 implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 2 && args[0] != null && args[0] instanceof Number
                 && args[1] != null && args[1] instanceof Number) {
@@ -52,6 +53,7 @@ public class ATan2 implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/Abs.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Abs implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return Math.abs(((Number) args[0]).doubleValue());
@@ -51,6 +52,7 @@ public class Abs implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/math/Ceil.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Ceil implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return (long) Math.ceil(((Number) args[0]).doubleValue());
@@ -51,6 +52,7 @@ public class Ceil implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/math/Combin.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Combin implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if(args.length != 2)
             return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects two numbers");
@@ -66,6 +67,7 @@ public class Combin implements Function {
         return nFact / (rFact * nminusrFact);
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/Cos.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Cos implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return Math.cos(((Number) args[0]).doubleValue());
@@ -51,6 +52,7 @@ public class Cos implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/Cosh.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Cosh implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return StrictMath.cosh(((Number) args[0]).doubleValue());
@@ -51,6 +52,7 @@ public class Cosh implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/Degrees.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Degrees implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return Math.toDegrees(((Number) args[0]).doubleValue());
@@ -51,6 +52,7 @@ public class Degrees implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/Even.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Even implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return Even.RoundUpToEven(((Number) args[0]).doubleValue());
@@ -56,6 +57,7 @@ public class Even implements Function {
         return ((temp % 2) == 0) ? temp : temp+1;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/Exp.java

@@ -42,6 +42,7 @@ import com.google.refine.grel.Function;
 
 public class Exp implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] instanceof Number) {
             return Math.exp(((Number) args[0]).doubleValue());
@@ -49,6 +50,7 @@ public class Exp implements Function {
         return null;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/math/Fact.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Fact implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return FactN.factorial(((Number) args[0]).intValue(), 1);
@@ -51,6 +52,7 @@ public class Fact implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/FactN.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class FactN implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length != 2)
             return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects two numbers");
@@ -68,6 +69,7 @@ public class FactN implements Function {
             return i * FactN.factorial(i - step, step);
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/Floor.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Floor implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return (long) Math.floor(((Number) args[0]).doubleValue());
@@ -51,6 +52,7 @@ public class Floor implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
     
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/math/GreatestCommonDenominator.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class GreatestCommonDenominator implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 2 && args[0] != null && args[0] instanceof Number
                 && args[1] != null && args[1] instanceof Number) {
@@ -56,6 +57,7 @@ public class GreatestCommonDenominator implements Function {
         return b == 0 ? a : GCD(b, a % b);
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/LeastCommonMultiple.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class LeastCommonMultiple implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 2
                 && args[0] != null && args[0] instanceof Number
@@ -67,6 +68,7 @@ public class LeastCommonMultiple implements Function {
         return largerValue * smallerValue;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/Ln.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Ln implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return Math.log(((Number) args[0]).doubleValue());
@@ -51,6 +52,7 @@ public class Ln implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/math/Log.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Log implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return Math.log10(((Number) args[0]).doubleValue());
@@ -51,6 +52,7 @@ public class Log implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a number");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/math/Max.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Max implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 2 && 
                 args[0] != null && args[0] instanceof Number &&
@@ -55,6 +56,7 @@ public class Max implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects 2 numbers");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/math/Min.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Min implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 2 && 
                 args[0] != null && args[0] instanceof Number && 
@@ -55,6 +56,7 @@ public class Min implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects 2 numbers");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/math/Mod.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Mod implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 2 && 
                 args[0] != null && args[0] instanceof Number && 
@@ -56,6 +57,7 @@ public class Mod implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects 2 numbers");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/math/Multinomial.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Multinomial implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length < 1)
             return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects one or more numbers");
@@ -59,6 +60,7 @@ public class Multinomial implements Function {
         return FactN.factorial(sum, 1) / product;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/Odd.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Odd implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 1 && args[0] != null && args[0] instanceof Number) {
             return Odd.RoundUpToOdd(((Number) args[0]).doubleValue());
@@ -56,6 +57,7 @@ public class Odd implements Function {
         return ((temp % 2) == 0) ? temp + 1 : temp;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
 

main/src/com/google/refine/expr/functions/math/Pow.java

@@ -42,6 +42,7 @@ import com.google.refine.grel.Function;
 
 public class Pow implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 2 && args[0] instanceof Number && args[1] instanceof Number) {
             return Math.pow(
@@ -52,6 +53,7 @@ public class Pow implements Function {
         return null;
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {
     

main/src/com/google/refine/expr/functions/math/Quotient.java

@@ -44,6 +44,7 @@ import com.google.refine.grel.Function;
 
 public class Quotient implements Function {
 
+    @Override
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 2 && args[0] != null && args[0] instanceof Number
                 && args[1] != null && args[1] instanceof Number) {
@@ -52,6 +53,7 @@ public class Quotient implements Function {
         return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects two numbers");
     }
 
+    @Override
     public void write(JSONWriter writer, Properties options)
         throws JSONException {