| /******************************************************************************* |
| * Copyright (c) 2000, 2008 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.jsdt.internal.ui.refactoring.reorg; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.swt.dnd.ByteArrayTransfer; |
| import org.eclipse.swt.dnd.TransferData; |
| import org.eclipse.wst.jsdt.internal.corext.refactoring.TypedSource; |
| |
| public class TypedSourceTransfer extends ByteArrayTransfer { |
| |
| /** |
| * Singleton instance. |
| */ |
| private static final TypedSourceTransfer fgInstance = new TypedSourceTransfer(); |
| |
| // Create a unique ID to make sure that different Eclipse |
| // applications use different "types" of <code>TypedSourceTransfer</code> |
| private static final String TYPE_NAME = "typed-source-transfer-format:" + System.currentTimeMillis() + ":" + fgInstance.hashCode();//$NON-NLS-2$//$NON-NLS-1$ |
| |
| private static final int TYPEID = registerType(TYPE_NAME); |
| |
| private TypedSourceTransfer() { |
| } |
| |
| /** |
| * Returns the singleton instance. |
| * |
| * @return the singleton instance |
| */ |
| public static TypedSourceTransfer getInstance() { |
| return fgInstance; |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on Transfer. |
| */ |
| protected int[] getTypeIds() { |
| return new int[] {TYPEID}; |
| } |
| |
| /* (non-Javadoc) |
| * Returns the type names. |
| * |
| * @return the list of type names |
| */ |
| protected String[] getTypeNames() { |
| return new String[] {TYPE_NAME}; |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on Transfer. |
| */ |
| protected void javaToNative(Object data, TransferData transferData) { |
| if (! (data instanceof TypedSource[])) |
| return; |
| TypedSource[] sources = (TypedSource[]) data; |
| |
| /* |
| * The serialization format is: |
| * (int) number of elements |
| * Then, the following for each element: |
| * (int) type (see <code>IJavaScriptElement</code>) |
| * (String) source of the element |
| */ |
| |
| try { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| DataOutputStream dataOut = new DataOutputStream(out); |
| |
| dataOut.writeInt(sources.length); |
| |
| for (int i = 0; i < sources.length; i++) { |
| writeJavaElement(dataOut, sources[i]); |
| } |
| |
| dataOut.close(); |
| out.close(); |
| |
| super.javaToNative(out.toByteArray(), transferData); |
| } catch (IOException e) { |
| //it's best to send nothing if there were problems |
| } |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on Transfer. |
| */ |
| protected Object nativeToJava(TransferData transferData) { |
| |
| byte[] bytes = (byte[]) super.nativeToJava(transferData); |
| if (bytes == null) |
| return null; |
| DataInputStream in = new DataInputStream(new ByteArrayInputStream(bytes)); |
| try { |
| int count = in.readInt(); |
| TypedSource[] results = new TypedSource[count]; |
| for (int i = 0; i < count; i++) { |
| results[i] = readJavaElement(in); |
| Assert.isNotNull(results[i]); |
| } |
| in.close(); |
| return results; |
| } catch (IOException e) { |
| return null; |
| } |
| } |
| |
| private static TypedSource readJavaElement(DataInputStream dataIn) throws IOException { |
| int type= dataIn.readInt(); |
| String source= dataIn.readUTF(); |
| return TypedSource.create(source, type); |
| } |
| |
| private static void writeJavaElement(DataOutputStream dataOut, TypedSource sourceReference) throws IOException { |
| dataOut.writeInt(sourceReference.getType()); |
| dataOut.writeUTF(sourceReference.getSource()); |
| } |
| } |
| |