bunch of PMD-induced fixes

(now the PMD report is clean)


git-svn-id: http://google-refine.googlecode.com/svn/trunk@430 7d457c2a-affb-35e4-300a-418c747d4874

build.xml

@@ -262,8 +262,7 @@
             classname="net.sourceforge.pmd.ant.PMDTask"
             classpathref="pmd.path" 
         />
-        <pmd targetjdk="1.6" encoding="UTF-8">
+        <pmd rulesetfiles="${conf.dir}/pmd.rules.xml" targetjdk="1.6" encoding="UTF-8">
-            <ruleset>basic</ruleset>        
             <formatter type="html" toFile="${reports.dir}/pmd.html" toConsole="true"/>
             <fileset dir="${server.src.dir}">
                 <include name="**/*.java"/>

gridworks

@@ -576,6 +576,8 @@ findbugs() {
     
     ANT_PARAMS="-Dfindbugs.dir=${GRIDWORKS_TOOLS_DIR}/${FINDBUGS_DIR}"
     ant findbugs
+    
+    open "$GRIDWORKS_BUILD_DIR/reports/findbugs.html"
 }    
 
 pmd() {
@@ -583,6 +585,8 @@ pmd() {
     
     ANT_PARAMS="-Dpmd.dir=${GRIDWORKS_TOOLS_DIR}/${PMD_DIR}"
     ant pmd
+    
+    open "$GRIDWORKS_BUILD_DIR/reports/pmd.html"
 }    
 
 cpd() {
@@ -590,6 +594,8 @@ cpd() {
     
     ANT_PARAMS="-Dpmd.dir=${GRIDWORKS_TOOLS_DIR}/${PMD_DIR}"
     ant cpd
+
+    open "$GRIDWORKS_BUILD_DIR/reports/cpd.txt"
 }    
 
 jslint() {
@@ -597,6 +603,8 @@ jslint() {
 
     ANT_PARAMS="-Djslint.dir=${GRIDWORKS_TOOLS_DIR}/${JSLINT_DIR}"
     ant jslint
+
+    open "$GRIDWORKS_BUILD_DIR/reports/jslint.txt"
 }
 
 # -------------------------- script -----------------------------

src/conf/pmd.rules.xml

@@ -0,0 +1,33 @@
+<?xml version="1.0"?>
+<ruleset name="Gridworks PMD Ruleset"
+    xmlns="http://pmd.sf.net/ruleset/1.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
+    xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
+  <description>Gridworks PMD Ruleset</description>
+
+  <rule ref="rulesets/basic.xml">
+    <exclude name="EmptyCatchBlock"/>
+    <exclude name="AvoidUsingHardCodedIP"/>
+  </rule>
+
+  <rule ref="rulesets/braces.xml">
+    <exclude name="IfStmtsMustUseBraces"/>
+  </rule>  
+  
+  <rule ref="rulesets/unusedcode.xml"/>
+  <rule ref="rulesets/imports.xml"/>
+  <rule ref="rulesets/strings.xml">
+    <exclude name="ConsecutiveLiteralAppends"/>
+    <exclude name="AvoidDuplicateLiterals"/>
+  </rule>
+
+  <rule ref="rulesets/junit.xml"/>
+  <rule ref="rulesets/unusedcode.xml"/>
+  <rule ref="rulesets/clone.xml"/>
+  
+  <rule ref="rulesets/migrating.xml">
+    <exclude name="JUnit4TestShouldUseTestAnnotation"/>
+  </rule>  
+  
+</ruleset>

src/main/java/com/metaweb/gridworks/ProjectManager.java

@@ -429,33 +429,21 @@ public class ProjectManager {
     }
     
     protected void load() {
-        try {
+        if (loadFromFile(new File(_workspaceDir, "workspace.json"))) return;
-            loadFromFile(new File(_workspaceDir, "workspace.json"));
+        if (loadFromFile(new File(_workspaceDir, "workspace.temp.json"))) return;
-            return;
+        if (loadFromFile(new File(_workspaceDir, "workspace.old.json"))) return;
-        } catch (Exception e) {
     }
     
-        try {
+    protected boolean loadFromFile(File file) {
-            loadFromFile(new File(_workspaceDir, "workspace.temp.json"));
-            return;
-        } catch (Exception e) {
-        }
-        
-        try {
-            loadFromFile(new File(_workspaceDir, "workspace.old.json"));
-            return;
-        } catch (Exception e) {
-        }
-    }
-    
-    protected void loadFromFile(File file) throws IOException, JSONException {
         Gridworks.log("Loading workspace from " + file.getAbsolutePath());
         
         _projectsMetadata.clear();
         _expressions.clear();
         
-        FileReader reader = new FileReader(file);
+        if (file.exists() || file.canRead()) {
+            FileReader reader = null;
             try {
+                reader = new FileReader(file);
                 JSONTokener tokener = new JSONTokener(reader);
                 JSONObject obj = (JSONObject) tokener.nextValue();
                 
@@ -471,8 +459,20 @@ public class ProjectManager {
                 }
                 
                 JSONUtilities.getStringList(obj, "expressions", _expressions);
+                return true;
+            } catch (JSONException e) {
+                Gridworks.warn("Error reading " + file, e);
+            } catch (IOException e) {
+                Gridworks.warn("Error reading " + file, e);
             } finally {
+                try {
                     reader.close();
+                } catch (IOException e) {
+                    Gridworks.warn("Exception closing file",e);
                 }
             }
         }
+        
+        return false;
+    }
+}

src/main/java/com/metaweb/gridworks/browsing/Engine.java

@@ -25,6 +25,8 @@ public class Engine implements Jsonizable {
     protected List<Facet>     _facets = new LinkedList<Facet>();
     protected boolean		  _includeDependent;
     
+    public final static String INCLUDE_DEPENDENT = "includeDependent";
+    
     public Engine(Project project) {
         _project  = project;
     }
@@ -75,8 +77,8 @@ public class Engine implements Jsonizable {
 	        }
     	}
     	
-        if (o.has("includeDependent") && !o.isNull("includeDependent")) {
+        if (o.has(INCLUDE_DEPENDENT) && !o.isNull(INCLUDE_DEPENDENT)) {
-        	_includeDependent = o.getBoolean("includeDependent");
+        	_includeDependent = o.getBoolean(INCLUDE_DEPENDENT);
         }
     }
         
@@ -98,7 +100,7 @@ public class Engine implements Jsonizable {
 	            facet.write(writer, options);
 	        }
 	        writer.endArray();
-        writer.key("includeDependent"); writer.value(_includeDependent);
+        writer.key(INCLUDE_DEPENDENT); writer.value(_includeDependent);
         writer.endObject();
     }
 }

src/main/java/com/metaweb/gridworks/browsing/facets/RangeFacet.java

@@ -23,7 +23,7 @@ public class RangeFacet implements Facet {
     protected String     _name;       // name of facet
     protected String     _expression; // expression to compute numeric value(s) per row
     protected String     _columnName; // column to base expression on, if any
-    protected String     _mode;       // "range", "min", "max"
+    protected String     _mode;       // "range", MIN, MAX
     
     protected double    _from; // the numeric selection
     protected double    _to;
@@ -59,6 +59,11 @@ public class RangeFacet implements Facet {
     public RangeFacet() {
     }
 
+    private static final String MIN = "min";
+    private static final String MAX = "max";
+    private static final String TO = "to";
+    private static final String FROM = "from";
+    
     public void write(JSONWriter writer, Properties options)
             throws JSONException {
         
@@ -72,8 +77,8 @@ public class RangeFacet implements Facet {
             writer.key("error"); writer.value(_errorMessage);
         } else {
             if (!Double.isInfinite(_min) && !Double.isInfinite(_max)) {
-                writer.key("min"); writer.value(_min);
+                writer.key(MIN); writer.value(_min);
-                writer.key("max"); writer.value(_max);
+                writer.key(MAX); writer.value(_max);
                 writer.key("step"); writer.value(_step);
                 
                 writer.key("bins"); writer.array();
@@ -88,13 +93,13 @@ public class RangeFacet implements Facet {
                 }
                 writer.endArray();
                 
-                if ("min".equals(_mode)) {
+                if (MIN.equals(_mode)) {
-                    writer.key("from"); writer.value(_from);
+                    writer.key(FROM); writer.value(_from);
-                } else if ("max".equals(_mode)) {
+                } else if (MAX.equals(_mode)) {
-                    writer.key("to"); writer.value(_to);
+                    writer.key(TO); writer.value(_to);
                 } else {
-                    writer.key("from"); writer.value(_from);
+                    writer.key(FROM); writer.value(_from);
-                    writer.key("to"); writer.value(_to);
+                    writer.key(TO); writer.value(_to);
                 }
             }
             
@@ -129,20 +134,20 @@ public class RangeFacet implements Facet {
         }
         
         _mode = o.getString("mode");
-        if ("min".equals(_mode)) {
+        if (MIN.equals(_mode)) {
-            if (o.has("from")) {
+            if (o.has(FROM)) {
-                _from = o.getDouble("from");
+                _from = o.getDouble(FROM);
                 _selected = true;
             }
-        } else if ("max".equals(_mode)) {
+        } else if (MAX.equals(_mode)) {
-            if (o.has("to")) {
+            if (o.has(TO)) {
-                _to = o.getDouble("to");
+                _to = o.getDouble(TO);
                 _selected = true;
             }
         } else {
-            if (o.has("from") && o.has("to")) {
+            if (o.has(FROM) && o.has(TO)) {
-                _from = o.getDouble("from");
+                _from = o.getDouble(FROM);
-                _to = o.getDouble("to");
+                _to = o.getDouble(TO);
                 _selected = true;
             }
         }
@@ -159,7 +164,7 @@ public class RangeFacet implements Facet {
 
     public RowFilter getRowFilter() {
         if (_eval != null && _errorMessage == null && _selected) {
-            if ("min".equals(_mode)) {
+            if (MIN.equals(_mode)) {
                 return new ExpressionNumberComparisonRowFilter(
                         _eval, _columnName, _cellIndex, _selectNumeric, _selectNonNumeric, _selectBlank, _selectError) {
                     
@@ -167,7 +172,7 @@ public class RangeFacet implements Facet {
                         return d >= _from;
                     };
                 };
-            } else if ("max".equals(_mode)) {
+            } else if (MAX.equals(_mode)) {
                 return new ExpressionNumberComparisonRowFilter(
                         _eval, _columnName, _cellIndex, _selectNumeric, _selectNonNumeric, _selectBlank, _selectError) {
                     

src/main/java/com/metaweb/gridworks/commands/edit/CreateProjectCommand.java

@@ -332,7 +332,7 @@ public class CreateProjectCommand extends Command {
     
     private String[] getExtension(String filename) {
         String[] result = new String[2];
-        int ext_index = filename.lastIndexOf(".");
+        int ext_index = filename.lastIndexOf('.');
         result[0] = (ext_index == -1) ? filename : filename.substring(0,ext_index);
         result[1] = (ext_index == -1) ? "" : filename.substring(ext_index + 1);
         return result;

src/main/java/com/metaweb/gridworks/commands/util/GuessTypesOfColumnCommand.java

@@ -125,7 +125,7 @@ public class GuessTypesOfColumnCommand extends Command {
             }
             jsonWriter.endObject();
             
-            StringBuffer sb = new StringBuffer();
+            StringBuffer sb = new StringBuffer(1024);
             sb.append("http://api.freebase.com/api/service/search?queries=");
             sb.append(ParsingUtilities.encode(stringWriter.toString()));
             

src/main/java/com/metaweb/gridworks/commands/util/PreviewProtographCommand.java

@@ -33,7 +33,7 @@ public class PreviewProtographCommand extends Command {
             JSONObject json = ParsingUtilities.evaluateJsonStringToObject(jsonString);
             Protograph protograph = Protograph.reconstruct(json);
             
-            StringBuffer sb = new StringBuffer();
+            StringBuffer sb = new StringBuffer(2048);
             sb.append("{ ");
             
             {

src/main/java/com/metaweb/gridworks/expr/JythonEvaluable.java

@@ -22,10 +22,13 @@ public class JythonEvaluable implements Evaluable {
         // indent and create a function out of the code
         String[] lines = s.split("\r\n|\r|\n");
         
-        StringBuffer sb = new StringBuffer();
+        StringBuffer sb = new StringBuffer(1024);
-        sb.append("def " + s_functionName + "(value, cell, cells, row, rowIndex):");
+        sb.append("def ");
+        sb.append(s_functionName);
+        sb.append("(value, cell, cells, row, rowIndex):");
         for (int i = 0; i < lines.length; i++) {
-            sb.append("\n  " + lines[i]);
+            sb.append("\n  ");
+            sb.append(lines[i]);
         }
 
         _engine.exec(sb.toString());

src/main/java/com/metaweb/gridworks/expr/functions/ToDate.java

@@ -18,6 +18,7 @@ public class ToDate implements Function {
     public Object call(Properties bindings, Object[] args) {
         if (args.length == 0) {
             // missing value, can this happen?
+            return null;
         }
         if (!(args[0] instanceof String)) {
             // ignore cell values that aren't strings

src/main/java/com/metaweb/gridworks/history/HistoryEntry.java

@@ -40,6 +40,8 @@ public class HistoryEntry implements Jsonizable {
     // the actual change, loaded on demand
     transient protected Change _change;
     
+    private final static String OPERATION = "operation";
+    
     public HistoryEntry(Project project, String description, AbstractOperation operation, Change change) {
         this.id = Math.round(Math.random() * 1000000) + System.currentTimeMillis();
         this.projectID = project.id;
@@ -66,7 +68,7 @@ public class HistoryEntry implements Jsonizable {
         writer.key("description"); writer.value(description);
         writer.key("time"); writer.value(ParsingUtilities.dateToString(time));
         if ("save".equals(options.getProperty("mode")) && operation != null) {
-            writer.key("operation"); operation.write(writer, options);
+            writer.key(OPERATION); operation.write(writer, options);
         }
         writer.endObject();
     }
@@ -121,8 +123,8 @@ public class HistoryEntry implements Jsonizable {
         JSONObject obj = ParsingUtilities.evaluateJsonStringToObject(s);
         
         AbstractOperation operation = null;
-        if (obj.has("operation") && !obj.isNull("operation")) {
+        if (obj.has(OPERATION) && !obj.isNull(OPERATION)) {
-            operation = OperationRegistry.reconstruct(project, obj.getJSONObject("operation"));
+            operation = OperationRegistry.reconstruct(project, obj.getJSONObject(OPERATION));
         }
         
         return new HistoryEntry(

src/main/java/com/metaweb/gridworks/history/HistoryProcess.java

@@ -20,6 +20,8 @@ public class HistoryProcess extends Process {
     
     protected boolean _done = false;
 
+    private final static String WARN = "Not a long-running process";
+    
     public HistoryProcess(Project project, long lastDoneID) {
         _project = project;
         _lastDoneID = lastDoneID;
@@ -33,7 +35,7 @@ public class HistoryProcess extends Process {
     }
     
     public void cancel() {
-        throw new RuntimeException("Not a long-running process");
+        throw new RuntimeException(WARN);
     }
 
     public boolean isImmediate() {
@@ -48,7 +50,7 @@ public class HistoryProcess extends Process {
     }
 
     public void startPerforming(ProcessManager manager) {
-        throw new RuntimeException("Not a long-running process");
+        throw new RuntimeException(WARN);
     }
 
     public void write(JSONWriter writer, Properties options)
@@ -62,10 +64,10 @@ public class HistoryProcess extends Process {
     }
 
     public boolean isDone() {
-        throw new RuntimeException("Not a long-running process");
+        throw new RuntimeException(WARN);
     }
 
     public boolean isRunning() {
-        throw new RuntimeException("Not a long-running process");
+        throw new RuntimeException(WARN);
     }
 }

src/main/java/com/metaweb/gridworks/importers/TsvCsvImporter.java

@@ -31,7 +31,7 @@ public class TsvCsvImporter implements Importer {
         
         int rowsWithData = 0;
         while ((line = lnReader.readLine()) != null) {
-            if (line.trim().length() == 0) {
+            if (StringUtils.isBlank(line)) {
                 continue;
             }
             

src/main/java/com/metaweb/gridworks/model/Row.java

@@ -26,6 +26,9 @@ public class Row implements HasFields, Jsonizable {
     transient public int[]          contextRowSlots;
     transient public int[]          contextCellSlots;
     
+    private static final String FLAGGED = "flagged";
+    private static final String STARRED = "starred";
+    
     public Row(int cellCount) {
         cells = new ArrayList<Cell>(cellCount);
     }
@@ -39,9 +42,9 @@ public class Row implements HasFields, Jsonizable {
     }
     
     public Object getField(String name, Properties bindings) {
-        if ("flagged".equals(name)) {
+        if (FLAGGED.equals(name)) {
             return flagged;
-        } else if ("starred".equals(name)) {
+        } else if (STARRED.equals(name)) {
             return starred;
         }
         return null;
@@ -105,8 +108,8 @@ public class Row implements HasFields, Jsonizable {
             throws JSONException {
         
         writer.object();
-        writer.key("flagged"); writer.value(flagged);
+        writer.key(FLAGGED); writer.value(flagged);
-        writer.key("starred"); writer.value(starred);
+        writer.key(STARRED); writer.value(starred);
         
         writer.key("cells"); writer.array();
         for (Cell cell : cells) {
@@ -166,11 +169,11 @@ public class Row implements HasFields, Jsonizable {
             }
         }
         
-        if (obj.has("starred")) {
+        if (obj.has(STARRED)) {
-            row.starred = obj.getBoolean("starred");
+            row.starred = obj.getBoolean(STARRED);
         }
-        if (obj.has("flagged")) {
+        if (obj.has(FLAGGED)) {
-            row.flagged = obj.getBoolean("flagged");
+            row.flagged = obj.getBoolean(FLAGGED);
         }
         
         return row;

src/main/java/com/metaweb/gridworks/model/recon/DataExtensionReconConfig.java

@@ -16,6 +16,8 @@ import com.metaweb.gridworks.protograph.FreebaseType;
 public class DataExtensionReconConfig extends StrictReconConfig {
     final public FreebaseType type;
     
+    private final static String WARN = "Not implemented";
+    
     static public ReconConfig reconstruct(JSONObject obj) throws Exception {
         JSONObject type = obj.getJSONObject("type");
         
@@ -34,17 +36,15 @@ public class DataExtensionReconConfig extends StrictReconConfig {
     @Override
     public ReconJob createJob(Project project, int rowIndex, Row row,
             String columnName, Cell cell) {
-        throw new RuntimeException("Not implemented");
+        throw new RuntimeException(WARN);
     }
 
     @Override
     public int getBatchSize() {
-        throw new RuntimeException("Not implemented");
+        throw new RuntimeException(WARN);
     }
 
-    public void write(JSONWriter writer, Properties options)
+    public void write(JSONWriter writer, Properties options) throws JSONException {
-            throws JSONException {
-        
         writer.object();
         writer.key("mode"); writer.value("extend");
         writer.key("type"); type.write(writer, options); 
@@ -53,12 +53,11 @@ public class DataExtensionReconConfig extends StrictReconConfig {
     
     @Override
     public List<Recon> batchRecon(List<ReconJob> jobs) {
-        throw new RuntimeException("Not implemented");
+        throw new RuntimeException(WARN);
     }
 
     @Override
     public String getBriefDescription(Project project, String columnName) {
-        throw new RuntimeException("Not implemented");
+        throw new RuntimeException(WARN);
     }
-
 }

src/main/java/com/metaweb/gridworks/model/recon/GuidBasedReconConfig.java

@@ -111,8 +111,9 @@ public class GuidBasedReconConfig extends StrictReconConfig {
                 query = stringWriter.toString();
             }
             
-            StringBuffer sb = new StringBuffer();
+            StringBuffer sb = new StringBuffer(1024);
-            sb.append(s_mqlreadService + "?query=");
+            sb.append(s_mqlreadService);
+            sb.append("?query=");
             sb.append(ParsingUtilities.encode(query));
             
             URL url = new URL(sb.toString());

src/main/java/com/metaweb/gridworks/model/recon/HeuristicReconConfig.java

@@ -222,7 +222,7 @@ public class HeuristicReconConfig extends ReconConfig {
             }
             jsonWriter.endObject();
             
-            StringBuffer sb = new StringBuffer();
+            StringBuffer sb = new StringBuffer(1024);
             sb.append("http://api.freebase.com/api/service/search?indent=1&queries=");
             sb.append(ParsingUtilities.encode(stringWriter.toString()));
             

src/main/java/com/metaweb/gridworks/model/recon/IdBasedReconConfig.java

@@ -115,8 +115,9 @@ public class IdBasedReconConfig extends StrictReconConfig {
                 query = stringWriter.toString();
             }
             
-            StringBuffer sb = new StringBuffer();
+            StringBuffer sb = new StringBuffer(1024);
-            sb.append(s_mqlreadService + "?query=");
+            sb.append(s_mqlreadService);
+            sb.append("?query=");
             sb.append(ParsingUtilities.encode(query));
             
             URL url = new URL(sb.toString());

src/main/java/com/metaweb/gridworks/model/recon/KeyBasedReconConfig.java

@@ -129,8 +129,9 @@ public class KeyBasedReconConfig extends StrictReconConfig {
                 query = stringWriter.toString();
             }
             
-            StringBuffer sb = new StringBuffer();
+            StringBuffer sb = new StringBuffer(1024);
-            sb.append(s_mqlreadService + "?query=");
+            sb.append(s_mqlreadService);
+            sb.append("?query=");
             sb.append(ParsingUtilities.encode(query));
             
             URL url = new URL(sb.toString());

src/main/java/com/metaweb/gridworks/protograph/transpose/MqlreadLikeTransposedNodeFactory.java

@@ -21,6 +21,14 @@ import com.metaweb.gridworks.protograph.ValueNode;
 public class MqlreadLikeTransposedNodeFactory implements TransposedNodeFactory {
     protected List<JSONObject> rootObjects = new LinkedList<JSONObject>();
     
+    private static final String TYPE = "type";
+    private static final String ID = "id";
+    private static final String NAME = "name";
+    private static final String CREATE = "create";
+    private static final String VALUE = "value";
+    private static final String CONNECT = "connect";
+    private static final String LANG = "connect";
+    
     public JSONArray getJSON() {
         return new JSONArray(rootObjects);
     }
@@ -58,9 +66,9 @@ public class MqlreadLikeTransposedNodeFactory implements TransposedNodeFactory {
             if (obj == null) {
                 obj = new JSONObject();
                 try {
-                    obj.put("type", this.node.type.id);
+                    obj.put(TYPE, this.node.type.id);
-                    obj.put("id", (String) null);
+                    obj.put(ID, (String) null);
-                    obj.put("create", "unconditional");
+                    obj.put(CREATE, "unconditional");
                 } catch (JSONException e) {
                     e.printStackTrace();
                 }
@@ -89,12 +97,12 @@ public class MqlreadLikeTransposedNodeFactory implements TransposedNodeFactory {
                     if (cell.recon != null && 
                         cell.recon.judgment == Recon.Judgment.Matched &&
                         cell.recon.match != null) {
-                        obj.put("id", cell.recon.match.topicID);
+                        obj.put(ID, cell.recon.match.topicID);
                     } else {
-                        obj.put("id", (String) null);
+                        obj.put(ID, (String) null);
-                        obj.put("name", cell.value.toString());
+                        obj.put(NAME, cell.value.toString());
-                        obj.put("type", node.type.id);
+                        obj.put(TYPE, node.type.id);
-                        obj.put("create", "unless_exists");
+                        obj.put(CREATE, "unless_exists");
                     }
                 } catch (JSONException e) {
                     e.printStackTrace();
@@ -118,13 +126,13 @@ public class MqlreadLikeTransposedNodeFactory implements TransposedNodeFactory {
             if (obj == null) {
                 obj = new JSONObject();
                 try {
-                    obj.put("value", cell.value.toString());
+                    obj.put(VALUE, cell.value.toString());
-                    obj.put("type", node.valueType);
+                    obj.put(TYPE, node.valueType);
                     if ("/type/text".equals(node.lang)) {
-                        obj.put("lang", node.lang);
+                        obj.put(LANG, node.lang);
                     }
                     
-                    obj.put("connect", "insert");
+                    obj.put(CONNECT, "insert");
                 } catch (JSONException e) {
                     e.printStackTrace();
                 }
@@ -147,13 +155,13 @@ public class MqlreadLikeTransposedNodeFactory implements TransposedNodeFactory {
             if (obj == null) {
                 obj = new JSONObject();
                 try {
-                    obj.put("value", cell.value.toString());
+                    obj.put(VALUE, cell.value.toString());
                     
                     JSONObject nsObj = new JSONObject();
-                    nsObj.put("id", node.namespace.id);
+                    nsObj.put(ID, node.namespace.id);
                     
                     obj.put("namespace", nsObj);
-                    obj.put("connect", "insert");
+                    obj.put(CONNECT, "insert");
                 } catch (JSONException e) {
                     e.printStackTrace();
                 }
@@ -174,7 +182,7 @@ public class MqlreadLikeTransposedNodeFactory implements TransposedNodeFactory {
             if (obj == null) {
                 obj = new JSONObject();
                 try {
-                    obj.put("id", node.topic.id);
+                    obj.put(ID, node.topic.id);
                 } catch (JSONException e) {
                     e.printStackTrace();
                 }
@@ -195,13 +203,13 @@ public class MqlreadLikeTransposedNodeFactory implements TransposedNodeFactory {
             if (obj == null) {
                 obj = new JSONObject();
                 try {
-                    obj.put("value", node.value);
+                    obj.put(VALUE, node.value);
-                    obj.put("type", node.valueType);
+                    obj.put(TYPE, node.valueType);
                     if ("/type/text".equals(node.lang)) {
-                        obj.put("lang", node.lang);
+                        obj.put(LANG, node.lang);
                     }
                     
-                    obj.put("connect", "insert");
+                    obj.put(CONNECT, "insert");
                 } catch (JSONException e) {
                     e.printStackTrace();
                 }

src/main/java/com/metaweb/gridworks/protograph/transpose/TripleLoaderTransposedNodeFactory.java

@@ -91,7 +91,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
     
     protected class AnonymousTransposedNode extends TransposedNodeWithChildren {
         
-        protected AnonymousTransposedNode(AnonymousNode node) { }
+        //protected AnonymousTransposedNode(AnonymousNode node) { }
         
         public String write(String subject, String predicate) {
             if (children.size() == 0 || subject == null) {
@@ -249,7 +249,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
             FreebaseProperty property, 
             AnonymousNode node) {
         
-        WritingTransposedNode tnode = new AnonymousTransposedNode(node);
+        WritingTransposedNode tnode = new AnonymousTransposedNode();
         
         processTransposedNode(tnode, parentNode, property);
         

src/server/java/com/metaweb/gridworks/Configurations.java

@@ -5,35 +5,35 @@ package com.metaweb.gridworks;
  */
 public class Configurations {
 
-    public static String get(String name) {
+    public static String get(final String name) {
         return System.getProperty(name);
     }
     
-    public static String get(String name, String def) {
+    public static String get(final String name, final String def) {
-        String val = get(name);
+        final String val = get(name);
         return (val == null) ? def : val;
     }
 
-    public static boolean getBoolean(String name, boolean def) {
+    public static boolean getBoolean(final String name, final boolean def) {
-        String val = get(name);
+        final String val = get(name);
         return (val == null) ? def : Boolean.parseBoolean(val);
     }
 
-    public static int getInteger(String name, int def) {
+    public static int getInteger(final String name, final int def) {
-        String val = get(name);
+        final String val = get(name);
         try {
             return (val == null) ? def : Integer.parseInt(val);
         } catch (NumberFormatException e) {
-            throw new RuntimeException("Could not parse '" + val + "' as an integer number.");
+            throw new RuntimeException("Could not parse '" + val + "' as an integer number.", e);
         }
     }
 
-    public static float getFloat(String name, float def) {
+    public static float getFloat(final String name, final float def) {
-        String val = get(name);
+        final String val = get(name);
         try {
             return (val == null) ? def : Float.parseFloat(val);
         } catch (NumberFormatException e) {
-            throw new RuntimeException("Could not parse '" + val + "' as a floating point number.");
+            throw new RuntimeException("Could not parse '" + val + "' as a floating point number.", e);
         }
     }
     

src/server/java/com/metaweb/gridworks/Gridworks.java

@@ -32,7 +32,7 @@ import org.mortbay.log.Log;
 import org.mortbay.util.Scanner;
 
 import com.metaweb.util.logging.IndentingLayout;
-import com.metaweb.util.signal.SignalHandler;
+import com.metaweb.util.signal.AbstractSignalHandler;
 import com.metaweb.util.threads.ThreadPoolExecutorAdapter;
 
 public class Gridworks {
@@ -298,7 +298,7 @@ class GridworksClient extends JFrame implements ActionListener {
     }
 }
 
-class ShutdownSignalHandler extends SignalHandler {
+class ShutdownSignalHandler extends AbstractSignalHandler {
     
     private Server _server;
 

src/server/java/com/metaweb/util/logging/IndentingLayout.java

@@ -48,7 +48,6 @@ public class IndentingLayout extends Layout {
     protected static final int CONTEXT_SIZE = 25;
     protected static final long MAX_DELTA = 10000;
 
-    protected final StringBuffer buf = new StringBuffer(256);
     protected Calendar calendar = Calendar.getInstance();
     protected long previousTime = 0;
     protected int indentation = 0;
@@ -67,7 +66,7 @@ public class IndentingLayout extends Layout {
         if ((leader == '<') && (secondLeader == ' ') && (this.indentation > 0)) this.indentation--;
 
         // Reset buf
-        buf.setLength(0);
+        StringBuffer buf = new StringBuffer(256);
 
         Date date = new Date();
         long now = date.getTime();
@@ -134,7 +133,7 @@ public class IndentingLayout extends Layout {
 
     private void pad(StringBuffer buffer, int pads, char padchar) {
         for (int i = 0; i < pads; i++) {
-            buf.append(padchar);
+            buffer.append(padchar);
         }
     }
 

src/server/java/com/metaweb/util/signal/AbstractSignalHandler.java

@@ -1,14 +1,12 @@
 package com.metaweb.util.signal;
 
-public abstract class SignalHandler {
+public abstract class AbstractSignalHandler {
 
-    SignalHandlerWrapper _wrapper;
+    public AbstractSignalHandler(final String signalName) {
-    
-    public SignalHandler(String signalName) {
         try {
-            _wrapper = new SignalHandlerWrapper(signalName, this);
+            new SignalHandlerWrapper(signalName, this);
         } catch (Throwable e) {
-            throw new java.lang.RuntimeException("Signal handling facilities are not available in this JVM.");
+            throw new java.lang.RuntimeException("Signal handling facilities are not available in this JVM.", e);
         }
     }
         

src/server/java/com/metaweb/util/signal/SignalHandlerWrapper.java

@@ -1,22 +1,25 @@
 package com.metaweb.util.signal;
 
+import sun.misc.Signal;
+import sun.misc.SignalHandler;
+
 /*
  * This class allows our own SignalHandler class to fail more gracefully 
  * in case the "sun.misc.Signal*" classes are not found in the current jvm.
  */
-final class SignalHandlerWrapper implements sun.misc.SignalHandler {
+final class SignalHandlerWrapper implements SignalHandler {
 
-    private final sun.misc.SignalHandler existingHandler;
+    private transient final SignalHandler existingHandler;
 
-    private final SignalHandler handler;
+    private transient final AbstractSignalHandler handler;
 
-    SignalHandlerWrapper(String signalName, SignalHandler handler) {
+    SignalHandlerWrapper(final String signalName, final AbstractSignalHandler handler) {
         this.handler = handler;
-        sun.misc.Signal signal = new sun.misc.Signal(signalName);
+        final Signal signal = new Signal(signalName);
-        existingHandler = sun.misc.Signal.handle(signal, this);
+        existingHandler = Signal.handle(signal, this);
     }
 
-    public void handle(sun.misc.Signal sig) {
+    public void handle(final Signal sig) {
         if (handler.handle(sig.getName()) && (existingHandler != null)) {
             existingHandler.handle(sig);
         }