Made sure commands that create new columns check for duplicate column names.

git-svn-id: http://google-refine.googlecode.com/svn/trunk@1126 7d457c2a-affb-35e4-300a-418c747d4874

main/src/com/metaweb/gridworks/commands/history/UndoRedoCommand.java

@@ -31,10 +31,14 @@ public class UndoRedoCommand extends Command {
             }
         }
         
+        try {
             boolean done = lastDoneID == -1 ||
                 project.processManager.queueProcess(
                     new HistoryProcess(project, lastDoneID));
             
             respond(response, "{ \"code\" : " + (done ? "\"ok\"" : "\"pending\"") + " }");
+        } catch (Exception e) {
+            respondException(response, e);
+        }
     }
 }

main/src/com/metaweb/gridworks/operations/cell/TransposeColumnsIntoRowsOperation.java

@@ -73,6 +73,12 @@ public class TransposeColumnsIntoRowsOperation extends AbstractOperation {
 
     @Override
     protected HistoryEntry createHistoryEntry(Project project, long historyEntryID) throws Exception {
+        if (_combinedColumnName != null && 
+            !_combinedColumnName.isEmpty() &&
+            project.columnModel.getColumnByName(_combinedColumnName) != null) {
+            throw new Exception("Another column already named " + _combinedColumnName);
+        }
+
         List<Column> newColumns = new ArrayList<Column>();
         List<Column> oldColumns = project.columnModel.columns;
         

main/src/com/metaweb/gridworks/operations/column/ColumnAdditionOperation.java

@@ -105,6 +105,9 @@ public class ColumnAdditionOperation extends EngineDependentOperation {
         if (column == null) {
             throw new Exception("No column named " + _baseColumnName);
         }
+        if (project.columnModel.getColumnByName(_newColumnName) != null) {
+            throw new Exception("Another column already named " + _newColumnName);
+        }
         
         List<CellAtRow> cellsAtRows = new ArrayList<CellAtRow>(project.rows.size());
         

main/src/com/metaweb/gridworks/process/ProcessManager.java

@@ -31,14 +31,9 @@ public class ProcessManager implements Jsonizable {
         writer.endObject();
     }
 
-    public HistoryEntry queueProcess(Process process) {
+    public HistoryEntry queueProcess(Process process) throws Exception {
         if (process.isImmediate() && _processes.size() == 0) {
-            try {
             return process.performImmediate();
-            } catch (Exception e) {
-                // TODO: Not sure what to do yet
-                e.printStackTrace();
-            }
         } else {
             _processes.add(process);
             
@@ -47,14 +42,9 @@ public class ProcessManager implements Jsonizable {
         return null;
     }
     
-    public boolean queueProcess(HistoryProcess process) {
+    public boolean queueProcess(HistoryProcess process) throws Exception {
         if (process.isImmediate() && _processes.size() == 0) {
-            try {
             return process.performImmediate() != null;
-            } catch (Exception e) {
-                // TODO: Not sure what to do yet
-                e.printStackTrace();
-            }
         } else {
             _processes.add(process);
             

main/webapp/modules/core/scripts/project.js

@@ -243,6 +243,8 @@ Gridworks.postProcess = function(command, params, body, updateOptions, callbacks
                 } catch (e) {
                     Gridworks.reportException(e);
                 }
+            } else {
+                alert(o.message);
             }
         } else {
             if ("onDone" in callbacks) {