Bug 126658 [CommonNavigator] [DND] Complete definition of DND API
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonDropAdapterAssistant.java
/*******************************************************************************
 * Copyright (c) 2003, 2005 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
 *******************************************************************************/
package org.eclipse.ui.navigator;
import org.eclipse.jface.util.LocalSelectionTransfer;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.TransferData;
import org.eclipse.ui.part.PluginTransfer;
/**
 * <p>
 * Used by the
 * <b>org.eclipse.ui.navigator.navigatorContent/navigatorContent/commonDropAdapter</b>
 * extension point to carry out pluggable drop operations.
 * </p>
 * <p>
 * Each {@link CommonDropAdapterAssistant} is contained by single content
 * extension. The opportunity for each assistant to handle the drop operation is
 * determined by the <b>possibleChildren</b> expression of the
 * <b>org.eclipse.ui.navigator.navigatorContent/navigatorContent</b> extension.
 * Whenever a match is found, the assistant will be given an opportunity to
 * first {@link #validateDrop(Object, int, TransferData) }, and then if the