Merge pull request #1384 from jackyq2015/issue/1383

Issue #1383

.settings/org.eclipse.jdt.core.prefs

@@ -1,15 +1,15 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=1.7
+org.eclipse.jdt.core.compiler.compliance=1.8
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
-org.eclipse.jdt.core.compiler.source=1.7
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_annotation=0

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

@@ -35,10 +35,11 @@ package com.google.refine;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
-import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -193,7 +194,7 @@ public abstract class ProjectManager {
             }//FIXME what should be the behaviour if metadata is null? i.e. not found
 
             Project project = getProject(id);
-            if (project != null && metadata != null && metadata.getModified().after(project.getLastSave())) {
+            if (project != null && metadata != null && metadata.getModified().isAfter(project.getLastSave())) {
                 try {
                     saveProject(project);
                 } catch (Exception e) {
@@ -256,7 +257,7 @@ public abstract class ProjectManager {
      */
     protected void saveProjects(boolean allModified) {
         List<SaveRecord> records = new ArrayList<SaveRecord>();
-        Date startTimeOfSave = new Date();
+        LocalDateTime startTimeOfSave = LocalDateTime.now();
         
         synchronized (this) {
             for (long id : _projectsMetadata.keySet()) {
@@ -265,18 +266,18 @@ public abstract class ProjectManager {
 
                 if (project != null) {
                     boolean hasUnsavedChanges =
-                        metadata.getModified().getTime() >= project.getLastSave().getTime();
+                        metadata.getModified().atZone(ZoneId.systemDefault()).toInstant().toEpochMilli() >= project.getLastSave().atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
                     // We use >= instead of just > to avoid the case where a newly created project
                     // has the same modified and last save times, resulting in the project not getting
                     // saved at all.
 
                     if (hasUnsavedChanges) {
-                        long msecsOverdue = startTimeOfSave.getTime() - project.getLastSave().getTime();
+                        long msecsOverdue = startTimeOfSave.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli() - project.getLastSave().atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
 
                         records.add(new SaveRecord(project, msecsOverdue));
 
                     } else if (!project.getProcessManager().hasPending()
-                              && startTimeOfSave.getTime() - project.getLastSave().getTime() > PROJECT_FLUSH_DELAY) {
+                              && startTimeOfSave.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli() - project.getLastSave().atZone(ZoneId.systemDefault()).toInstant().toEpochMilli() > PROJECT_FLUSH_DELAY) {
                         
                         /*
                          *  It's been a while since the project was last saved and it hasn't been
@@ -309,7 +310,8 @@ public abstract class ProjectManager {
 
             for (int i = 0;
                  i < records.size() &&
-                    (allModified || (new Date().getTime() - startTimeOfSave.getTime() < QUICK_SAVE_MAX_TIME));
+                    (allModified || (LocalDateTime.now().atZone(ZoneId.systemDefault()).toInstant().toEpochMilli() - 
+                            startTimeOfSave.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli() < QUICK_SAVE_MAX_TIME));
                  i++) {
 
                 try {
@@ -332,7 +334,7 @@ public abstract class ProjectManager {
                 ProjectMetadata metadata = getProjectMetadata(id);
                 Project project = _projects.get(id);
                 if (project != null && !project.getProcessManager().hasPending() 
-                        && metadata.getModified().getTime() < project.getLastSave().getTime()) {
+                        && metadata.getModified().atZone(ZoneId.systemDefault()).toInstant().toEpochMilli() < project.getLastSave().atZone(ZoneId.systemDefault()).toInstant().toEpochMilli()) {
                         _projects.remove(id).dispose();
                 }
             }

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

@@ -35,8 +35,8 @@ package com.google.refine;
 
 import java.io.Serializable;
 import java.lang.reflect.Field;
+import java.time.LocalDateTime;
 import java.util.ArrayList;
-import java.util.Date;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
@@ -57,12 +57,11 @@ import com.google.refine.util.JSONUtilities;
 import com.google.refine.util.ParsingUtilities;
 
 public class ProjectMetadata implements Jsonizable {
-
+    private final LocalDateTime     _created;
-    private final Date _created;
+    private LocalDateTime           _modified;
-    private Date _modified;
+    private LocalDateTime written = null;
-    private Date written = null;
+    private String         _name = "";
-    private String _name = "";
+    private String         _password = "";
-    private String _password = "";
 
     private String _encoding = "";
     private int _encodingConfidence;
@@ -79,24 +78,24 @@ public class ProjectMetadata implements Jsonizable {
     private JSONArray _importOptionMetadata = new JSONArray();
 
     // user metadata
-    private JSONArray _userMetadata = new JSONArray();;
+    private JSONArray _userMetadata = new JSONArray();
     
-    private Map<String, Serializable> _customMetadata = new HashMap<String, Serializable>();
+    private Map<String, Serializable>   _customMetadata = new HashMap<String, Serializable>();
-    private PreferenceStore _preferenceStore = new PreferenceStore();
+    private PreferenceStore             _preferenceStore = new PreferenceStore();
 
     private final static Logger logger = LoggerFactory.getLogger("project_metadata");
 
-    protected ProjectMetadata(Date date) {
+    protected ProjectMetadata(LocalDateTime date) {
         _created = date;
         preparePreferenceStore(_preferenceStore);
     }
 
     public ProjectMetadata() {
-        this(new Date());
+        this(LocalDateTime.now());
         _modified = _created;
     }
 
-    public ProjectMetadata(Date created, Date modified, String name) {
+    public ProjectMetadata(LocalDateTime created, LocalDateTime modified, String name) {
         this(created);
         _modified = modified;
         _name = name;
@@ -115,10 +114,8 @@ public class ProjectMetadata implements Jsonizable {
             writer.value(tag);
         }
         writer.endArray();
-        writer.key("created");
+        writer.key("created"); writer.value(ParsingUtilities.localDateToString(_created));
-        writer.value(ParsingUtilities.dateToString(_created));
+        writer.key("modified"); writer.value(ParsingUtilities.localDateToString(_modified));
-        writer.key("modified");
-        writer.value(ParsingUtilities.dateToString(_modified));
         writer.key("creator");
         writer.value(_creator);
         writer.key("contributors");
@@ -132,6 +129,7 @@ public class ProjectMetadata implements Jsonizable {
 
         writer.key("customMetadata");
         writer.object();
+        
         for (String key : _customMetadata.keySet()) {
             Serializable value = _customMetadata.get(key);
             writer.key(key);
@@ -167,7 +165,7 @@ public class ProjectMetadata implements Jsonizable {
         writer.endObject();
 
         if (isSaveMode(options)) {
-            written = new Date();
+            written = LocalDateTime.now();
         }
     }
 
@@ -181,7 +179,7 @@ public class ProjectMetadata implements Jsonizable {
     }
 
     public boolean isDirty() {
-        return written == null || _modified.after(written);
+        return written == null || _modified.isAfter(written);
     }
 
     public void write(JSONWriter jsonWriter)
@@ -207,10 +205,10 @@ public class ProjectMetadata implements Jsonizable {
     }
 
     static public ProjectMetadata loadFromJSON(JSONObject obj) {
-        // TODO: Is this correct? It's using modified date for creation date
+        // TODO: Is this correct?  It's using modified date for creation date
-        ProjectMetadata pm = new ProjectMetadata(JSONUtilities.getDate(obj, "modified", new Date()));
+        ProjectMetadata pm = new ProjectMetadata(JSONUtilities.getLocalDate(obj, "modified", LocalDateTime.now()));
 
-        pm._modified = JSONUtilities.getDate(obj, "modified", new Date());
+        pm._modified = JSONUtilities.getLocalDate(obj, "modified", LocalDateTime.now());
         pm._name = JSONUtilities.getString(obj, "name", "<Error recovering project name>");
         pm._password = JSONUtilities.getString(obj, "password", "");
 
@@ -277,7 +275,7 @@ public class ProjectMetadata implements Jsonizable {
             }
         } 
         
-        pm.written = new Date(); // Mark it as not needing writing until modified
+        pm.written = LocalDateTime.now(); // Mark it as not needing writing until modified
         
         return pm;
     }
@@ -287,7 +285,7 @@ public class ProjectMetadata implements Jsonizable {
         // Any project specific preferences?
     }
 
-    public Date getCreated() {
+    public LocalDateTime getCreated() {
         return _created;
     }
 
@@ -358,12 +356,12 @@ public class ProjectMetadata implements Jsonizable {
         return _password;
     }
 
-    public Date getModified() {
+    public  LocalDateTime getModified() {
         return _modified;
     }
 
     public void updateModified() {
-        _modified = new Date();
+        _modified = LocalDateTime.now();
     }
 
     public PreferenceStore getPreferenceStore() {

main/src/com/google/refine/commands/expr/PreviewExpressionCommand.java

@@ -35,8 +35,10 @@ package com.google.refine.commands.expr;
 
 import java.io.IOException;
 import java.io.Serializable;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.OffsetDateTime;
 import java.util.Calendar;
-import java.util.Date;
 import java.util.List;
 import java.util.Properties;
 
@@ -212,10 +214,10 @@ public class PreviewExpressionCommand extends Command {
                     Calendar c = (Calendar) v;
                     
                     sb.append("[date " + 
-                        ParsingUtilities.dateToString(c.getTime()) +"]");
+                        ParsingUtilities.dateToString(OffsetDateTime.ofInstant(c.toInstant(), ZoneId.systemDefault())) +"]");
-                } else if (v instanceof Date) {
+                } else if (v instanceof LocalDateTime) {
                     sb.append("[date " + 
-                            ParsingUtilities.dateToString((Date) v) +"]");
+                            ParsingUtilities.dateToString((OffsetDateTime) v) +"]");
                 } else if (v instanceof String) {
                     if (quote) {
                         sb.append(JSONObject.quote((String) v));

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

@@ -35,6 +35,7 @@ package com.google.refine.expr.functions;
 
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
+import java.time.OffsetDateTime;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.GregorianCalendar;
@@ -83,7 +84,7 @@ public class ToDate implements Function {
             try {
                 return CalendarParser.parse( o1, (month_first) ? CalendarParser.MM_DD_YY : CalendarParser.DD_MM_YY);
             } catch (CalendarParserException e) {
-                Date d = ParsingUtilities.stringToDate(o1);
+                OffsetDateTime d = ParsingUtilities.stringToDate(o1);
                 if (d != null) {
                     return d;
                 } else {

main/src/com/google/refine/history/HistoryEntry.java

@@ -34,7 +34,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 package com.google.refine.history;
 
 import java.io.Writer;
-import java.util.Date;
+import java.time.ZoneId;
+import java.time.OffsetDateTime;
 import java.util.Properties;
 
 import org.json.JSONException;
@@ -59,7 +60,7 @@ public class HistoryEntry implements Jsonizable {
     final public long   id;
     final public long   projectID;
     final public String description;
-    final public Date   time;
+    final public OffsetDateTime   time;
 
     // the manager (deals with IO systems or databases etc.)
     final public HistoryEntryManager _manager;
@@ -85,11 +86,11 @@ public class HistoryEntry implements Jsonizable {
     }
 
     public HistoryEntry(long id, Project project, String description, AbstractOperation operation, Change change) {
-        this(id,project.id,description,operation,new Date());
+        this(id,project.id,description,operation,OffsetDateTime.now(ZoneId.of("Z")));
         setChange(change);
     }
 
-    protected HistoryEntry(long id, long projectID, String description, AbstractOperation operation, Date time) {
+    protected HistoryEntry(long id, long projectID, String description, AbstractOperation operation, OffsetDateTime time) {
         this.id = id;
         this.projectID = projectID;
         this.description = description;

main/src/com/google/refine/io/ProjectMetadataUtilities.java

@@ -39,7 +39,9 @@ import java.io.FileReader;
 import java.io.IOException;
 import java.io.OutputStreamWriter;
 import java.io.Writer;
-import java.util.Date;
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
 import java.util.List;
 
 import org.apache.commons.lang.StringUtils;
@@ -137,7 +139,9 @@ public class ProjectMetadataUtilities {
                     mtime = Math.max(mtime, time);
                 }
             }
-            pm = new ProjectMetadata(new Date(ctime),new Date(mtime), tempName);
+            pm = new ProjectMetadata(LocalDateTime.ofInstant(Instant.ofEpochMilli(ctime), ZoneId.systemDefault()),
+                    LocalDateTime.ofInstant(Instant.ofEpochMilli(mtime), ZoneId.systemDefault()),
+                    tempName);
             logger.error("Partially recovered missing metadata project in directory " + projectDir + " - " + tempName);
         }
         return pm;

main/src/com/google/refine/model/Cell.java

@@ -35,15 +35,16 @@ package com.google.refine.model;
 
 import java.io.Serializable;
 import java.io.Writer;
-import java.util.Calendar;
+import java.time.LocalDateTime;
-import java.util.Date;
+import java.time.OffsetDateTime;
 import java.util.Properties;
 
+import org.json.JSONException;
+import org.json.JSONWriter;
+
 import com.fasterxml.jackson.core.JsonFactory;
 import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.core.JsonToken;
-import org.json.JSONException;
-import org.json.JSONWriter;
 
 import com.google.refine.Jsonizable;
 import com.google.refine.expr.EvalError;
@@ -86,11 +87,11 @@ public class Cell implements HasFields, Jsonizable {
         } else {
             writer.key("v");
             if (value != null) {
-                if (value instanceof Calendar) {
+                if (value instanceof LocalDateTime) {
-                    writer.value(ParsingUtilities.dateToString(((Calendar) value).getTime()));
+                    writer.value(ParsingUtilities.localDateToString((LocalDateTime)value));
                     writer.key("t"); writer.value("date");
-                } else if (value instanceof Date) {
+                } else if (value instanceof OffsetDateTime) {
-                    writer.value(ParsingUtilities.dateToString((Date) value));
+                    writer.value(ParsingUtilities.dateToString((OffsetDateTime) value));
                     writer.key("t"); writer.value("date");
                 } else if (value instanceof Double 
                         && (((Double)value).isNaN() || ((Double)value).isInfinite())) {

main/src/com/google/refine/model/Project.java

@@ -41,8 +41,8 @@ import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.io.Writer;
 import java.lang.reflect.Method;
+import java.time.LocalDateTime;
 import java.util.ArrayList;
-import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -66,21 +66,15 @@ public class Project {
     final static protected Map<String, Class<? extends OverlayModel>> 
         s_overlayModelClasses = new HashMap<String, Class<? extends OverlayModel>>();
     
-    static public void registerOverlayModel(String modelName, Class<? extends OverlayModel> klass) {
-        s_overlayModelClasses.put(modelName, klass);
-    }
-    
     final public long                       id;
     final public List<Row>                  rows = new ArrayList<Row>();
-    
     final public ColumnModel                columnModel = new ColumnModel();
     final public RecordModel                recordModel = new RecordModel();
     final public Map<String, OverlayModel>  overlayModels = new HashMap<String, OverlayModel>();
-    
     final public History                    history;
     
     transient public ProcessManager processManager = new ProcessManager();
-    transient private Date _lastSave = new Date();
+    transient private LocalDateTime _lastSave = LocalDateTime.now();
 
     final static Logger logger = LoggerFactory.getLogger("project");
 
@@ -98,6 +92,10 @@ public class Project {
         this.history = new History(this);
     }
     
+    static public void registerOverlayModel(String modelName, Class<? extends OverlayModel> klass) {
+        s_overlayModelClasses.put(modelName, klass);
+    }
+    
     /**
      * Free/dispose of project data from memory.
      */
@@ -113,14 +111,14 @@ public class Project {
         // The rest of the project should get garbage collected when we return.
     }
 
-    public Date getLastSave(){
+    public LocalDateTime getLastSave(){
         return this._lastSave;
     }
     /**
      * Sets the lastSave time to now
      */
     public void setLastSave(){
-        this._lastSave = new Date();
+        this._lastSave = LocalDateTime.now();
     }
 
     public ProjectMetadata getMetadata() {

main/src/com/google/refine/model/recon/StandardReconConfig.java

@@ -38,6 +38,8 @@ import java.io.InputStream;
 import java.io.StringWriter;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.time.ZoneId;
+import java.time.OffsetDateTime;
 import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.Date;
@@ -307,9 +309,11 @@ public class StandardReconConfig extends ReconConfig {
                                 jsonWriter.key("name"); jsonWriter.value(cell2.recon.match.name);
                                 jsonWriter.endObject();
                             } else if (cell2.value instanceof Calendar) {
-                                jsonWriter.value(ParsingUtilities.dateToString(((Calendar) cell2.value).getTime()));
+                                Calendar calendar = (Calendar) cell2.value;
+                                OffsetDateTime d = OffsetDateTime.ofInstant(calendar.toInstant(), ZoneId.of("Z"));
+                                jsonWriter.value(ParsingUtilities.dateToString(d));
                             } else if (cell2.value instanceof Date) {
-                                jsonWriter.value(ParsingUtilities.dateToString((Date) cell2.value));
+                                jsonWriter.value(ParsingUtilities.dateToString((OffsetDateTime) cell2.value));
                             } else {
                                 jsonWriter.value(cell2.value.toString());
                             }

main/src/com/google/refine/util/JSONUtilities.java

@@ -33,6 +33,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 package com.google.refine.util;
 
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.OffsetDateTime;
 import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.Collection;
@@ -94,9 +97,19 @@ public class JSONUtilities {
         }
     }
     
-    static public Date getDate(JSONObject obj, String key, Date def) {
+    static public OffsetDateTime getDate(JSONObject obj, String key, OffsetDateTime def) {
         try {
-            Date d = ParsingUtilities.stringToDate(obj.getString(key));
+            OffsetDateTime d = ParsingUtilities.stringToDate(obj.getString(key));
+            
+            return d != null ? d : def;
+        } catch (JSONException e) {
+            return def;
+        }
+    }
+    
+    static public LocalDateTime getLocalDate(JSONObject obj, String key, LocalDateTime def) {
+        try {
+            LocalDateTime d = ParsingUtilities.stringToLocalDate(obj.getString(key));
             
             return d != null ? d : def;
         } catch (JSONException e) {
@@ -180,9 +193,9 @@ public class JSONUtilities {
         } else if (value instanceof Boolean) {
             obj.put(key, value);
         } else if (value instanceof Date) {
-            obj.put(key, ParsingUtilities.dateToString((Date) value));
+            obj.put(key, ParsingUtilities.dateToString((OffsetDateTime) value));
         } else if (value instanceof Calendar) {
-            obj.put(key, ParsingUtilities.dateToString(((Calendar) value).getTime()));
+            obj.put(key, ParsingUtilities.dateToString(OffsetDateTime.ofInstant(((Calendar)value).toInstant(), ZoneId.of("Z"))));
         } else if (value instanceof String) {
             obj.put(key, value);
         } else {

main/src/com/google/refine/util/ParsingUtilities.java

@@ -38,9 +38,10 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.Reader;
 import java.io.UnsupportedEncodingException;
-import java.text.ParseException;
 import java.text.SimpleDateFormat;
-import java.util.Date;
+import java.time.LocalDateTime;
+import java.time.OffsetDateTime;
+import java.time.format.DateTimeFormatter;
 import java.util.Properties;
 
 import javax.servlet.http.HttpServletRequest;
@@ -168,26 +169,30 @@ public class ParsingUtilities {
     }
 
     /**
-     * Convert a date/time to an ISO 8601 string
+     * Convert a date/time to an ISO_LOCAL_DATE_TIME string
      * 
      * @param d the date to be written
-     * @return string with ISO 8601 formatted date & time
+     * @return string with ISO_LOCAL_DATE_TIME formatted date & time
      */
-    static public String dateToString(Date d) {
+    static public String dateToString(OffsetDateTime d) {
-        return ISO8601_FORMAT.get().format(d);
+        return d.format(DateTimeFormatter.ISO_OFFSET_DATE_TIME);
+    }
+    
+    static public String localDateToString(LocalDateTime d) {
+      return d.format(DateTimeFormatter.ISO_LOCAL_DATE_TIME);
     }
 
     /**
-     * Parse an ISO 8601 formatted string into a Java Date.
+     * Parse an ISO_LOCAL_DATE_TIME formatted string into a Java Date.
      * 
      * @param s the string to be parsed
-     * @return Date or null if the parse failed
+     * @return LocalDateTime or null if the parse failed
      */
-    static public Date stringToDate(String s) {
+    static public OffsetDateTime stringToDate(String s) {
-        try {
+        return OffsetDateTime.parse(s, DateTimeFormatter.ISO_OFFSET_DATE_TIME);
-            return ISO8601_FORMAT.get().parse(s);
+    }
-        } catch (ParseException e) {
+    
-            return null;
+    static public LocalDateTime stringToLocalDate(String s) {
-        }
+      return LocalDateTime.parse(s, DateTimeFormatter.ISO_LOCAL_DATE_TIME);
     }
 }

main/tests/server/src/com/google/refine/tests/ProjectManagerTests.java

@@ -41,8 +41,7 @@ import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.verifyNoMoreInteractions;
 import static org.mockito.Mockito.when;
 
-import java.util.Date;
+import java.time.LocalDateTime;
-import java.util.GregorianCalendar;
 
 import org.mockito.Mockito;
 import org.slf4j.LoggerFactory;
@@ -226,7 +225,7 @@ public class ProjectManagerTests extends RefineTest {
     }
 
     protected void whenProjectGetLastSave(Project proj){
-        Date projectLastSaveDate = new GregorianCalendar(1970,01,02,00,30,00).getTime();
+        LocalDateTime projectLastSaveDate = LocalDateTime.of(1970,01,02,00,30,00);
         when(proj.getLastSave()).thenReturn(projectLastSaveDate);
     }
 
@@ -234,7 +233,7 @@ public class ProjectManagerTests extends RefineTest {
         whenMetadataGetModified(meta, 5*60);
     }
     protected void whenMetadataGetModified(ProjectMetadata meta, int secondsDifference){
-        Date metadataModifiedDate = new GregorianCalendar(1970,01,02,00, 30, secondsDifference).getTime();
+        LocalDateTime metadataModifiedDate = LocalDateTime.of(1970,01,02,00, 30 + secondsDifference);
         when(meta.getModified()).thenReturn(metadataModifiedDate);
     }
 

main/tests/server/src/com/google/refine/tests/exporters/CsvExporterTests.java

@@ -40,8 +40,9 @@ import static org.mockito.Mockito.when;
 
 import java.io.IOException;
 import java.io.StringWriter;
-import java.util.Calendar;
+import java.time.LocalDateTime;
-import java.util.Date;
+import java.time.ZoneId;
+import java.time.OffsetDateTime;
 import java.util.Properties;
 
 import org.slf4j.LoggerFactory;
@@ -200,11 +201,11 @@ public class CsvExporterTests extends RefineTest {
     @Test
     public void exportDateColumns(){
         CreateGrid(1,2);
-        Calendar calendar = Calendar.getInstance();
+        LocalDateTime localDate = LocalDateTime.now();
-        Date date = new Date();
+        OffsetDateTime date = OffsetDateTime.now(ZoneId.of("Z"));
 
         when(options.getProperty("printColumnHeader")).thenReturn("false");
-        project.rows.get(0).cells.set(0, new Cell(calendar, null));
+        project.rows.get(0).cells.set(0, new Cell(localDate, null));
         project.rows.get(0).cells.set(1, new Cell(date, null));
 
         try {
@@ -213,7 +214,7 @@ public class CsvExporterTests extends RefineTest {
             Assert.fail();
         }
 
-        String expectedOutput = ParsingUtilities.dateToString(calendar.getTime()) + "," +
+        String expectedOutput = ParsingUtilities.localDateToString(localDate) + "," +
             ParsingUtilities.dateToString(date) + "\n";
 
         Assert.assertEquals(writer.toString(), expectedOutput);

main/tests/server/src/com/google/refine/tests/util/ParsingUtilitiesTests.java

@@ -33,6 +33,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 package com.google.refine.tests.util;
 
+import java.time.OffsetDateTime;
+import java.time.format.DateTimeFormatter;
+
 import org.json.JSONException;
 import org.json.JSONObject;
 import org.slf4j.LoggerFactory;
@@ -85,4 +88,23 @@ public class ParsingUtilitiesTests extends RefineTest {
             //expected
         }
     }
+    @Test
+    public void zonedDateTimeTest() {
+//        String d = "2017-07-18T20:26:28.582+03:00[Asia/Istanbul]";
+//        DateTimeFormatter formatter = DateTimeFormatter.ISO_ZONED_DATE_TIME ;
+//        OffsetDateTime.parse(d, formatter);
+        String  d = "2017-12-01T14:53:36Z";
+        DateTimeFormatter formatter = DateTimeFormatter.ISO_OFFSET_DATE_TIME;
+        OffsetDateTime.parse(d, formatter);
+    }
+    
+    @Test
+    public void parseProjectBeforeJDK8() {
+        String historyEntryDate = "2017-12-01T14:53:36Z";
+        
+        OffsetDateTime zdt = ParsingUtilities.stringToDate(historyEntryDate);
+        String zdtString = ParsingUtilities.dateToString(zdt);
+        Assert.assertEquals(zdtString, historyEntryDate);
+        
+    }
 }