CreateRelationalIndexAction.java example

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teiid-designer-master
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 * JBoss, Home of Professional Open Source.
*
* See the LEGAL.txt file distributed with this work for information regarding copyright ownership and licensing.
*
* See the AUTHORS.txt file distributed with this work for a full listing of individual contributors.
*/
package org.teiid.designer.relational.ui.actions;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Status;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.teiid.designer.core.ModelerCore;
import org.teiid.designer.core.workspace.ModelResource;
import org.teiid.designer.core.workspace.ModelWorkspaceException;
import org.teiid.designer.metamodels.relational.Index;
import org.teiid.designer.metamodels.relational.Procedure;
import org.teiid.designer.metamodels.relational.Table;
import org.teiid.designer.relational.model.RelationalIndex;
import org.teiid.designer.relational.model.RelationalModel;
import org.teiid.designer.relational.model.RelationalModelFactory;
import org.teiid.designer.relational.ui.Messages;
import org.teiid.designer.relational.ui.UiConstants;
import org.teiid.designer.relational.ui.UiPlugin;
import org.teiid.designer.relational.ui.edit.RelationalDialogModel;
import org.teiid.designer.relational.ui.editor.EditRelationalObjectDialog;
import org.teiid.designer.ui.actions.INewChildAction;
import org.teiid.designer.ui.actions.INewSiblingAction;
import org.teiid.designer.ui.common.eventsupport.SelectionUtilities;
import org.teiid.designer.ui.editors.ModelEditor;
import org.teiid.designer.ui.editors.ModelEditorManager;
import org.teiid.designer.ui.viewsupport.ModelIdentifier;
import org.teiid.designer.ui.viewsupport.ModelUtilities;

/**
 *
 */
public class CreateRelationalIndexAction  extends Action implements INewChildAction, INewSiblingAction {
	private IFile selectedModel;
	/**
	 * 
	 */
	public static final String TITLE = Messages.createRelationalIndexActionText;
	 
	/**
	 * 
	 */
	public CreateRelationalIndexAction() {
		super(TITLE);
		setImageDescriptor(UiPlugin.getDefault().getImageDescriptor( UiConstants.Images.NEW_INDEX_ICON));
	}
	
    /* (non-Javadoc)
     * @See org.teiid.designer.ui.actions.INewChildAction#canCreateChild(org.eclipse.emf.ecore.EObject)
     */
    @Override
	public boolean canCreateChild(EObject parent) {
    	return false;
    }
    
    /* (non-Javadoc)
     * @See org.teiid.designer.ui.actions.INewChildAction#canCreateChild(org.eclipse.core.resources.IFile)
     */
    @Override
	public boolean canCreateChild(IFile modelFile) {
    	return isApplicable(new StructuredSelection(modelFile));
    }
    
    /* (non-Javadoc)
     * @See org.teiid.designer.ui.actions.INewSiblingAction#canCreateChild(org.eclipse.emf.ecore.EObject)
     */
    @Override
	public boolean canCreateSibling(EObject parent) {
		// has to be a table, view, procedure or function
		if( !(parent instanceof Table || parent instanceof Procedure || parent instanceof Index) ) {
			return false;
		}
    	//Convert eObject selection to IFile
    	ModelResource mr = ModelUtilities.getModelResourceForModelObject(parent);
    	if( mr != null ) {
    		IFile modelFile = null;
    		
    		try {
				modelFile = (IFile)mr.getCorrespondingResource();
			} catch (ModelWorkspaceException ex) {
				UiConstants.Util.log(ex);
			}
    		if( modelFile != null ) {
    			return isApplicable(new StructuredSelection(modelFile));
    		}
    	}
    	
    	return false;
    }
    
	/**
	 * @param selection the selection
	 * @return true if selection applicable
	 */
	public boolean isApplicable(ISelection selection) {
		boolean result = false;
		if (!SelectionUtilities.isMultiSelection(selection)) {
			Object obj = SelectionUtilities.getSelectedObject(selection);
			if (obj instanceof IResource) {
				IResource iRes = (IResource) obj;
				if (ModelIdentifier.isRelationalSourceModel(iRes)) {
					this.selectedModel = (IFile) obj;
					result = true;
				}
			}
		}

		return result;
	}

	@Override
   public void run() {
		if( selectedModel != null ) {
	        ModelResource mr = ModelUtilities.getModelResource(selectedModel);
	        final Shell shell = UiPlugin.getDefault().getCurrentWorkbenchWindow().getShell();
	        
	        RelationalIndex index = new RelationalIndex();
	        
	        // Hand the table off to the generic edit dialog
	        RelationalDialogModel dialogModel = new RelationalDialogModel(index, selectedModel);
	        EditRelationalObjectDialog dialog = new EditRelationalObjectDialog(shell, dialogModel);
	        
	        dialog.open();
	        
	        if (dialog.getReturnCode() == Window.OK) {
	        	createIndexInTxn(mr, index);
	        }
		}
		
	}

    private void createIndexInTxn(ModelResource modelResource, RelationalIndex index) {
        boolean requiredStart = ModelerCore.startTxn(true, true, Messages.createRelationalProcedureTitle, this);
        boolean succeeded = false;
        try {
            ModelEditor editor = ModelEditorManager.getModelEditorForFile((IFile)modelResource.getCorrespondingResource(), true);
            if (editor != null) {
                boolean isDirty = editor.isDirty();

                RelationalModelFactory factory = new RelationalModelFactory();
                
                RelationalModel relModel = new RelationalModel("dummy"); //$NON-NLS-1$
                relModel.addChild(index);
                
                factory.build(modelResource, relModel, new NullProgressMonitor());

                if (!isDirty && editor.isDirty()) {
                    editor.doSave(new NullProgressMonitor());
                }
                succeeded = true;
            }
        } catch (Exception e) {
        	MessageDialog.openError(Display.getCurrent().getActiveShell(), Messages.createRelationalIndexExceptionMessage, e.getMessage());
            IStatus status = new Status(IStatus.ERROR, UiConstants.PLUGIN_ID, Messages.createRelationalIndexExceptionMessage, e);
            UiConstants.Util.log(status);

            return;
        } finally {
            // if we started the txn, commit it.
            if (requiredStart) {
                if (succeeded) {
                    ModelerCore.commitTxn();
                } else {
                    ModelerCore.rollbackTxn();
                }
            }
        }
    }
}