com.ibm.research.tours.content.dropadapter.LocalSelectionDropAdapter.java Source code

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Here is the source code for com.ibm.research.tours.content.dropadapter.LocalSelectionDropAdapter.java

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/*******************************************************************************
 * Copyright (c) 2006-2007 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *     IBM Research
 *******************************************************************************/
package com.ibm.research.tours.content.dropadapter;

import java.util.Vector;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.views.navigator.LocalSelectionTransfer;

import com.ibm.research.tours.ITourElement;
import com.ibm.research.tours.ITourElementDropAdapter;
import com.ibm.research.tours.content.elements.ResourceURLTourElement;

public class LocalSelectionDropAdapter implements ITourElementDropAdapter {

    public ITourElement[] convertDropData(Object data) {
        IStructuredSelection selection = (IStructuredSelection) LocalSelectionTransfer.getInstance().getSelection();
        Vector<ITourElement> elements = new Vector<ITourElement>();

        for (Object o : selection.toArray()) {
            if (o instanceof IJavaElement) {
                IJavaElement element = (IJavaElement) o;
                int type = element.getElementType();

                switch (type) {
                case IJavaElement.TYPE: // ok
                case IJavaElement.METHOD: // ok
                case IJavaElement.FIELD: // ok
                    //case IJavaElement.IMPORT_DECLARATION : // not intresting
                    //case IJavaElement.IMPORT_CONTAINER : // not intresting
                    //case IJavaElement.PACKAGE_DECLARATION : // not intresting
                    //case IJavaElement.PACKAGE_FRAGMENT : // as resource
                    //case IJavaElement.JAVA_PROJECT : // as resource
                    //case IJavaElement.CLASS_FILE : // as resource
                    elements.add(new ResourceURLTourElement(element));
                    continue;
                default:
                    break;
                }
            }

            // This will be processed as a resource
            IResource resource = null;

            if (o instanceof IJavaElement) {
                // don't use IAdaptable as for members only the top level type adapts
                resource = ((IJavaElement) o).getResource();
            } else if (o instanceof IAdaptable) {
                resource = (IResource) ((IAdaptable) o).getAdapter(IResource.class);
            }

            if (resource != null)
                elements.add(new ResourceURLTourElement(resource));
            else {
                MessageBox box = new MessageBox(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell());
                box.setText("Unsupported drop operation");
                box.setMessage(o.getClass().getName());
                box.open();
            }
        }

        return elements.toArray(new ITourElement[0]);
    }

    public Transfer getTransfer() {
        return LocalSelectionTransfer.getInstance();
    }
}