actions.DeleteAction.java Source code

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Here is the source code for actions.DeleteAction.java

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/*
* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description:
*
*/
package actions;

import interfaces.DeleteEObjectSet;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.edit.command.RemoveCommand;
import org.eclipse.emf.edit.domain.AdapterFactoryEditingDomain;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;

import views.OptionView;

public class DeleteAction implements IObjectActionDelegate {

    List<EObject> selectedObjects = new ArrayList<EObject>();

    private Object[][] RO_FEATURES = null;
    private Object[][] PARENT_FEATURE = null;

    public DeleteAction() {
        // Auto-generated constructor stub
    }

    public void setActivePart(IAction action, IWorkbenchPart targetPart) {
        DeleteEObjectSet deleteEObjectSet = (DeleteEObjectSet) targetPart.getAdapter(DeleteEObjectSet.class);
        if (deleteEObjectSet != null) {
            RO_FEATURES = deleteEObjectSet.getRoFeatures();
            PARENT_FEATURE = deleteEObjectSet.getParentFeature();
        } else {
            RO_FEATURES = null;
            PARENT_FEATURE = null;
        }

    }

    public void run(IAction action) {
        for (Iterator<EObject> iterator = selectedObjects.iterator(); iterator.hasNext();) {
            EObject object = iterator.next();
            EditingDomain editingDomain = AdapterFactoryEditingDomain.getEditingDomainFor(object);
            Object[] parentAndFeature = getParentAndFeature(object);
            if (parentAndFeature != null) {
                Command command = RemoveCommand.create(editingDomain, parentAndFeature[0], parentAndFeature[1],
                        object);
                if (command != null)
                    editingDomain.getCommandStack().execute(command);
            }

            if (PARENT_FEATURE[0][0] == OptionView.class) {
                Command command = RemoveCommand.create(editingDomain, object.eContainer(),
                        object.eContainingFeature(), object);
                if (command != null)
                    editingDomain.getCommandStack().execute(command);
            }
        }
    }

    private Object[] getParentAndFeature(EObject object) {
        EObject parent = object.eContainer();
        for (int i = 0; i < PARENT_FEATURE.length; i++) {
            Class klass = (Class) PARENT_FEATURE[i][0];
            EReference ref = (EReference) PARENT_FEATURE[i][1];
            if (klass.isInstance(object))
                return new Object[] { parent, ref };
        }
        return null;
    }

    public void selectionChanged(IAction action, ISelection selection) {
        selectedObjects.clear();
        if (selection instanceof IStructuredSelection) {
            IStructuredSelection structedSelection = (IStructuredSelection) selection;
            Object[] objects = structedSelection.toArray();
            selectToBeRemoved(objects);
        }
        if (!selectedObjects.isEmpty() && PARENT_FEATURE != null) {
            action.setEnabled(true);
        } else
            action.setEnabled(false);

    }

    private void selectToBeRemoved(Object[] objs) {
        for (int i = 0; i < objs.length; i++) {
            EObject obj = (EObject) objs[i];
            if (!isParentRO(obj))
                selectedObjects.add(obj);
        }
    }

    private boolean isParentRO(final EObject object) {
        EObject parent = object.eContainer();
        //      if(RootConf.class.isInstance(object))parent=((RootConf)object).getRoot();
        //      else parent=object.eContainer();

        if (parent != null && RO_FEATURES != null) {
            for (int i = 0; i < RO_FEATURES.length; i++) {
                Class klass = (Class) RO_FEATURES[i][0];
                EAttribute roAttr = (EAttribute) RO_FEATURES[i][1];
                if (klass.isInstance(object))
                    return (Boolean) object.eGet(roAttr);
            }
        }
        return false;
    }
}