| /* |
| * Copyright (c) 2001-2008 Caucho Technology, Inc. All rights reserved. |
| * |
| * The Apache Software License, Version 1.1 |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowlegement: |
| * "This product includes software developed by the |
| * Caucho Technology (http://www.caucho.com/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "Burlap", "Resin", and "Caucho" must not be used to |
| * endorse or promote products derived from this software without prior |
| * written permission. For written permission, please contact |
| * info@caucho.com. |
| * |
| * 5. Products derived from this software may not be called "Resin" |
| * nor may "Resin" appear in their names without prior written |
| * permission of Caucho Technology. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
| * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * @author Scott Ferguson |
| */ |
| |
| package com.alibaba.com.caucho.hessian.io; |
| |
| import java.io.IOException; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * Serializing an object for known object types. |
| */ |
| public class WriteReplaceSerializer extends AbstractSerializer { |
| private static final Logger log |
| = Logger.getLogger(WriteReplaceSerializer.class.getName()); |
| |
| private Object _writeReplaceFactory; |
| private Method _writeReplace; |
| private Serializer _baseSerializer; |
| |
| public WriteReplaceSerializer(Class<?> cl, |
| ClassLoader loader, |
| Serializer baseSerializer) { |
| introspectWriteReplace(cl, loader); |
| |
| _baseSerializer = baseSerializer; |
| } |
| |
| /** |
| * Returns the writeReplace method |
| */ |
| protected static Method getWriteReplace(Class<?> cl, Class<?> param) { |
| for (; cl != null; cl = cl.getSuperclass()) { |
| for (Method method : cl.getDeclaredMethods()) { |
| if (method.getName().equals("writeReplace") |
| && method.getParameterTypes().length == 1 |
| && param.equals(method.getParameterTypes()[0])) |
| return method; |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Returns the writeReplace method |
| */ |
| protected static Method getWriteReplace(Class<?> cl) { |
| for (; cl != null; cl = cl.getSuperclass()) { |
| Method[] methods = cl.getDeclaredMethods(); |
| |
| for (int i = 0; i < methods.length; i++) { |
| Method method = methods[i]; |
| |
| if (method.getName().equals("writeReplace") && |
| method.getParameterTypes().length == 0) |
| return method; |
| } |
| } |
| |
| return null; |
| } |
| |
| private void introspectWriteReplace(Class<?> cl, ClassLoader loader) { |
| try { |
| String className = cl.getName() + "HessianSerializer"; |
| |
| Class<?> serializerClass = Class.forName(className, false, loader); |
| |
| Object serializerObject = serializerClass.newInstance(); |
| |
| Method writeReplace = getWriteReplace(serializerClass, cl); |
| |
| if (writeReplace != null) { |
| _writeReplaceFactory = serializerObject; |
| _writeReplace = writeReplace; |
| } |
| } catch (ClassNotFoundException e) { |
| } catch (Exception e) { |
| log.log(Level.FINER, e.toString(), e); |
| } |
| |
| _writeReplace = getWriteReplace(cl); |
| if (_writeReplace != null) |
| _writeReplace.setAccessible(true); |
| } |
| |
| @Override |
| public void writeObject(Object obj, AbstractHessianOutput out) |
| throws IOException { |
| int ref = out.getRef(obj); |
| |
| if (ref >= 0) { |
| out.writeRef(ref); |
| |
| return; |
| } |
| |
| try { |
| Object repl; |
| |
| repl = writeReplace(obj); |
| |
| if (obj == repl) { |
| if (log.isLoggable(Level.FINE)) { |
| log.fine(this + ": Hessian writeReplace error. The writeReplace method (" + _writeReplace + ") must not return the same object"); |
| } |
| |
| _baseSerializer.writeObject(obj, out); |
| |
| return; |
| } |
| |
| out.writeObject(repl); |
| |
| out.replaceRef(repl, obj); |
| } catch (RuntimeException e) { |
| throw e; |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| protected Object writeReplace(Object obj) { |
| try { |
| if (_writeReplaceFactory != null) |
| return _writeReplace.invoke(_writeReplaceFactory, obj); |
| else |
| return _writeReplace.invoke(obj); |
| } catch (RuntimeException e) { |
| throw e; |
| } catch (InvocationTargetException e) { |
| throw new RuntimeException(e.getCause()); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |