org.eclipse.jpt.jpadiagrameditor.ui.internal.feature.RemoveJPAEntityFeature.java Source code

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Here is the source code for org.eclipse.jpt.jpadiagrameditor.ui.internal.feature.RemoveJPAEntityFeature.java

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/*******************************************************************************
 * <copyright>
 *
 * Copyright (c) 2005, 2010 SAP AG.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Stefan Dimov - initial API, implementation and documentation
 *
 * </copyright>
 *
 *******************************************************************************/
package org.eclipse.jpt.jpadiagrameditor.ui.internal.feature;

import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

import org.eclipse.emf.transaction.RecordingCommand;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.emf.transaction.util.TransactionUtil;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.context.IContext;
import org.eclipse.graphiti.features.context.IRemoveContext;
import org.eclipse.graphiti.features.context.impl.RemoveContext;
import org.eclipse.graphiti.features.impl.DefaultRemoveFeature;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
import org.eclipse.graphiti.mm.pictograms.PictogramElement;
import org.eclipse.graphiti.mm.pictograms.Shape;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jpt.jpa.core.context.PersistentAttribute;
import org.eclipse.jpt.jpa.core.context.PersistentType;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.i18n.JPAEditorMessages;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.provider.IJPAEditorFeatureProvider;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.util.JPAEditorUtil;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.util.JpaArtifactFactory;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.ui.PlatformUI;

public class RemoveJPAEntityFeature extends DefaultRemoveFeature {

    private boolean shouldRearrangeIsARelations = true;

    public RemoveJPAEntityFeature(IFeatureProvider fp, boolean shouldRearrangeIsARelations) {
        super(fp);
        this.shouldRearrangeIsARelations = shouldRearrangeIsARelations;
    }

    @Override
    public void preRemove(IRemoveContext context) {
        PictogramElement pe = context.getPictogramElement();
        final Object bo = getFeatureProvider().getBusinessObjectForPictogramElement(pe);
        Set<Shape> shapesForDeletion = new HashSet<Shape>();
        if (bo instanceof PersistentType) {
            PersistentType jpt = (PersistentType) bo;
            JpaArtifactFactory.instance().restoreEntityClass(jpt, getFeatureProvider());
            IFeatureProvider fp = getFeatureProvider();
            List<Shape> lst = ((ContainerShape) pe).getChildren();
            for (int i = lst.size() - 1; i >= 0; i--) {
                Shape textShape = lst.get(i);
                Object o = fp.getBusinessObjectForPictogramElement(textShape);
                if ((o != null) && (o instanceof PersistentAttribute)) {
                    shapesForDeletion.add(textShape);
                }
            }
            Iterator<Shape> it = shapesForDeletion.iterator();
            while (it.hasNext()) {
                RemoveAttributeFeature f = new RemoveAttributeFeature(fp, false, true);
                IRemoveContext ctx = new RemoveContext(it.next());
                f.remove(ctx);
            }
            String name = ((PersistentType) bo).getName();
            getFeatureProvider().remove(name, false);
        }
    }

    @Override
    public IJPAEditorFeatureProvider getFeatureProvider() {
        return (IJPAEditorFeatureProvider) super.getFeatureProvider();
    }

    @Override
    public void execute(IContext ctx) {
        if (!IRemoveContext.class.isInstance(ctx))
            return;
        final IRemoveContext context = (IRemoveContext) ctx;
        PictogramElement pe = context.getPictogramElement();
        Object bo = getFeatureProvider().getBusinessObjectForPictogramElement(pe);
        if (!PersistentType.class.isInstance(bo))
            return;
        PersistentType jpt = (PersistentType) bo;
        if (JPAEditorUtil.isEntityOpenElsewhere(jpt, true)) {
            String shortEntName = JPAEditorUtil.returnSimpleName(JpaArtifactFactory.instance().getEntityName(jpt));
            String message = NLS.bind(JPAEditorMessages.RemoveJPAEntityFeature_discardWarningMsg, shortEntName);
            MessageDialog dialog = new MessageDialog(
                    PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),
                    JPAEditorMessages.JPASolver_closeEditors, null, message, MessageDialog.WARNING,
                    new String[] { JPAEditorMessages.BTN_OK, JPAEditorMessages.BTN_CANCEL }, 0) {
                @Override
                protected int getShellStyle() {
                    return SWT.CLOSE | SWT.TITLE | SWT.BORDER | SWT.APPLICATION_MODAL | getDefaultOrientation();
                }
            };
            if (dialog.open() != 0)
                return;
        }
        TransactionalEditingDomain ted = TransactionUtil.getEditingDomain(pe);
        ted.getCommandStack().execute(new RecordingCommand(ted) {
            @Override
            protected void doExecute() {
                removeEntityFromDiagram(context);
            }
        });

    }

    public void removeEntityFromDiagram(IRemoveContext context) {
        super.execute(context);
    }

    @Override
    public void postRemove(IRemoveContext context) {
        if (shouldRearrangeIsARelations)
            JpaArtifactFactory.instance().rearrangeIsARelations(getFeatureProvider());
    }

}