| /******************************************************************************* |
| * Copyright (c) 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 |
| *******************************************************************************/ |
| package org.eclipse.wst.server.ui.internal.view.servers; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| |
| import org.eclipse.swt.dnd.ByteArrayTransfer; |
| import org.eclipse.swt.dnd.DND; |
| import org.eclipse.swt.dnd.TransferData; |
| import org.eclipse.wst.server.core.IServer; |
| import org.eclipse.wst.server.core.internal.IMemento; |
| import org.eclipse.wst.server.core.internal.Server; |
| import org.eclipse.wst.server.core.internal.XMLMemento; |
| /* |
| * The element serialization format is: |
| * (int) number of servers |
| * Then, the following for each server: |
| * (String) id |
| */ |
| public class ServerTransfer extends ByteArrayTransfer { |
| private static final ServerTransfer instance = new ServerTransfer(); |
| |
| // Create a unique ID to make sure that different Eclipse |
| // applications use different "types" of <code>JavaElementTransfer</code> |
| private static final String TYPE_NAME = "server-transfer-format:" + System.currentTimeMillis() + ":" + instance.hashCode(); |
| |
| private static final int TYPEID = registerType(TYPE_NAME); |
| |
| private ServerTransfer() { |
| // do nothing |
| } |
| |
| /** |
| * Returns the singleton instance. |
| * |
| * @return the singleton instance |
| */ |
| public static ServerTransfer getInstance() { |
| return instance; |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on Transfer. |
| */ |
| protected int[] getTypeIds() { |
| return new int[] { TYPEID }; |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on Transfer. |
| */ |
| protected String[] getTypeNames() { |
| return new String[] { TYPE_NAME }; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.swt.dnd.Transfer#javaToNative(java.lang.Object, org.eclipse.swt.dnd.TransferData) |
| */ |
| protected void javaToNative(Object data, TransferData transferData) { |
| if (!(data instanceof IServer[])) |
| return; |
| |
| IServer[] servers = (IServer[]) data; |
| try { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| |
| XMLMemento memento = XMLMemento.createWriteRoot("servers"); |
| |
| // write each element |
| for (int i = 0; i < servers.length; i++) { |
| IMemento child = memento.createChild("server"); |
| ((Server)servers[i]).serialize(child); |
| } |
| |
| memento.save(out); |
| |
| // cleanup |
| out.close(); |
| byte[] bytes = out.toByteArray(); |
| super.javaToNative(bytes, transferData); |
| } catch (IOException e) { |
| // it's best to send nothing if there were problems |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.swt.dnd.Transfer#nativeToJava(org.eclipse.swt.dnd.TransferData) |
| */ |
| protected Object nativeToJava(TransferData transferData) { |
| byte[] bytes = (byte[]) super.nativeToJava(transferData); |
| if (bytes == null) |
| return null; |
| ByteArrayInputStream in = new ByteArrayInputStream(bytes); |
| try { |
| IMemento memento = XMLMemento.loadMemento(in); |
| IMemento[] children = memento.getChildren("server"); |
| |
| int count = children.length; |
| IServer[] results = new IServer[count]; |
| for (int i = 0; i < count; i++) { |
| Server server = new Server(null); |
| server.deserialize(children[i]); |
| results[i] = server; |
| } |
| return results; |
| } catch (Exception e) { |
| DND.error(DND.ERROR_INVALID_DATA); |
| } |
| return null; |
| } |
| } |