private void showComparison() { // Find the instance that can be used for comparision. This instance // should be chosen from changedList or localHasUnexpInstance GKInstance instance = null; if (changedList != null) { // Check changedList first List selection = changedList.getSelection(); if (selection.size() > 0) instance = (GKInstance) selection.get(0); } if (instance == null && localHasMoreIEList != null) { List selection = localHasMoreIEList.getSelection(); if (selection.size() > 0) instance = (GKInstance) selection.get(0); } if (instance == null) return; final InstanceComparisonPane comparisonPane = new InstanceComparisonPane(); // Fine tune comparison pane for making comparisons with // database comparisonPane.setSaveDialogHideUnusedButtons(true); comparisonPane.setSaveDialogSaveAsNewBtnFirst(false); comparisonPane.setSaveDialogSaveAsNewBtnTitle( "Create new local instance and put merge into that"); comparisonPane.setSaveDialogReplaceFirstBtnTitle( "Overwrite existing instance with merge (recommended)"); comparisonPane.setCloseAfterSaving(true); try { String clsName = instance.getSchemClass().getName(); Long instanceId = instance.getDBID(); final GKInstance localCopy = fileAdaptor.fetchInstance(clsName, instanceId); dbAdaptor.setUseCache(false); // final GKInstance dbCopy = dbAdaptor.fetchInstance(clsName, instanceId); // The class type might be changed locally or remotely. So not clsName should be used // to fetch database instance. Otherwise, null exception will be thrown. The same thing // is done also in creating synchronization result. final GKInstance dbCopy = dbAdaptor.fetchInstance(instanceId); dbAdaptor.setUseCache(true); comparisonPane.setInstances(localCopy, dbCopy); String title = "Comparing Instances \"" + instance.getDisplayName() + "\" in the local and DB repositories"; JDialog parentDialog = (JDialog) SwingUtilities.getAncestorOfClass(JDialog.class, centerPane); final JDialog dialog = new JDialog(parentDialog, title); // Try to update the list automatically dialog.addWindowListener( new WindowAdapter() { public void windowClosed(WindowEvent e) { handleMergeResult(localCopy, dbCopy, comparisonPane); // To prevent double calling. It is called again when parentDialog is closed. dialog.removeWindowListener(this); } }); dialog.getContentPane().add(comparisonPane, BorderLayout.CENTER); dialog.setModal(true); dialog.setSize(800, 600); GKApplicationUtilities.center(dialog); dialog.setVisible(true); // Update synchronization dialog panels depending on user // choice. if (comparisonPane.getSaveMergeOption() == InstanceComparisonPane.SAVE_AS_NEW) { GKInstance merged = comparisonPane.getMerged(); if (newList == null) { List list = new ArrayList(); list.add(merged); newList = initInstanceListPane(list, "Instances created locally: " + list.size()); } else newList.addInstance(merged); } else if (comparisonPane.getSaveMergeOption() == InstanceComparisonPane.OVERWRITE_FIRST) { dbAdaptor.setUseCache(false); GKInstance remoteCopy = dbAdaptor.fetchInstance(instance.getDBID()); dbAdaptor.setUseCache(true); if (remoteCopy != null) { InstanceComparer comparer = new InstanceComparer(); int reply = comparer.compare(instance, remoteCopy); if (reply == InstanceComparer.LOCAL_HAS_MORE_IE) { if (localHasMoreIEList == null) { List list = new ArrayList(); list.add(instance); localHasMoreIEList = initInstanceListPane( list, "Local instances having unexpected InstanceEdits: " + list.size()); } else localHasMoreIEList.addInstance(instance); } else if (reply == InstanceComparer.IS_IDENTICAL) { // Merge has made local and database copies // identical - don't need to check in anymore changedList.deleteInstance(instance); } else if (reply != InstanceComparer.NEW_CHANGE_IN_LOCAL) { // Merge has produced a conflict typeMap.put(mapCompareResultToString(reply), instance); } else // The user should now be allowed to commit this // instance, because it will now have changed. commitToDBAction.setEnabled(true); JOptionPane.showMessageDialog( parentDialog, "Merge successful, you will need to check the merged instance into the database.\n\n", "Merge OK", JOptionPane.INFORMATION_MESSAGE); } } } catch (Exception e1) { System.err.println("Synchronization.createDisplayMapPane(): " + e1); e1.printStackTrace(); JOptionPane.showMessageDialog( this, "Error in comparing: " + instance.toString(), "Error in Comparing", JOptionPane.ERROR_MESSAGE); } }