de.tub.tfs.henshin.editor.actions.transSys.DeleteEPackageAction.java Source code

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Here is the source code for de.tub.tfs.henshin.editor.actions.transSys.DeleteEPackageAction.java

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/*******************************************************************************
 * Copyright (c) 2010-2015 Henshin developers. 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:
 *     TU Berlin, University of Luxembourg, SES S.A.
 *******************************************************************************/
/**
 * DeleteEPackageAction.java
 *
 * Created 19.12.2011 - 21:24:00
 */
package de.tub.tfs.henshin.editor.actions.transSys;

import java.util.LinkedList;
import java.util.List;

import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.henshin.model.Graph;
import org.eclipse.emf.henshin.model.Module;
import org.eclipse.emf.henshin.model.NamedElement;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.ui.actions.DeleteAction;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PlatformUI;

import de.tub.tfs.henshin.editor.editparts.epackage.EPackageTreeEditpart;
import de.tub.tfs.henshin.editor.util.HenshinUtil;

/**
 * @author nam
 * 
 */
public class DeleteEPackageAction extends DeleteAction {

    /**
     * An unique ID.
     */
    public static final String ID = "de.tub.tfs.henshin.editor.actions.transSys.DeleteEPackageAction";

    private List<EPackage> models = new LinkedList<EPackage>();

    private Module rootModel;

    /**
     * @param part
     */
    public DeleteEPackageAction(IWorkbenchPart part) {
        super(part);

        setId(ID);
        setText("Delete EPackage(s)");
        setToolTipText("Delete meta model(s).");
        setImageDescriptor(
                PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(ISharedImages.IMG_TOOL_DELETE));
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.action.Action#run()
     */
    @Override
    public void run() {
        StringBuffer errMsg = new StringBuffer();

        for (EPackage model : models) {
            List<NamedElement> refs = HenshinUtil.INSTANCE.getEPackageReferences(model, rootModel);

            for (NamedElement ref : refs) {
                errMsg.append("  '" + model.getName() + "' is referenced by '" + ref.getName()
                        + (ref instanceof Graph ? "' (Graph).\n" : "' (Rule).\n"));
            }
        }

        if (!errMsg.toString().isEmpty()) {
            MessageDialog.openWarning(getWorkbenchPart().getSite().getShell(), "EPackage Deletion Warning",
                    "Some package(s) will not be deleted, due to following references:\n\n" + errMsg.toString()
                            + "\nPlease remove all references first.");
        }

        super.run();
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.ui.actions.WorkbenchPartAction#calculateEnabled()
     */
    @Override
    protected boolean calculateEnabled() {
        List<?> selectedObjects = getSelectedObjects();

        rootModel = null;

        if (!selectedObjects.isEmpty()) {
            boolean onlyEPackagesSelected = selectedObjects.get(0) instanceof EPackageTreeEditpart;

            models.clear();

            for (Object selected : selectedObjects) {
                if (selected instanceof EPackageTreeEditpart) {
                    EPackage model = ((EPackageTreeEditpart) selected).getCastedModel();

                    this.models.add(model);

                    onlyEPackagesSelected &= true;
                } else {
                    onlyEPackagesSelected = false;

                    break;
                }
            }

            if (onlyEPackagesSelected) {
                rootModel = (Module) ((EditPart) selectedObjects.get(0)).getParent().getParent().getModel();
            }
        }

        return rootModel != null;
    }
}