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/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.river.api.io; import java.io.IOException; import java.io.ObjectOutputStream; import java.io.OutputStream; import java.security.AccessController; import java.security.PrivilegedAction; /** * PortableObjectOutputStream replaces @ref{Portable} instances * in the OutputStream with a PortableFactory that recreates the * Portable Object during unmarshalling. * * @author peter * @since 3.0.0 */ public class PortableObjectOutputStream extends ObjectOutputStream { public static ObjectOutputStream create(OutputStream out) throws IOException{ PortableObjectOutputStream result = new PortableObjectOutputStream(out); AccessController.doPrivileged(new EnableReplaceObject(result)); return result; } protected PortableObjectOutputStream (OutputStream out) throws IOException{ super(out); } @Override protected Object replaceObject(Object o){ if (o instanceof Portable) return ((Portable)o).factory(); return o; } private void enableReplaceObject(){ super.enableReplaceObject(true); } private static class EnableReplaceObject implements PrivilegedAction{ private final PortableObjectOutputStream out; EnableReplaceObject(PortableObjectOutputStream out){ this.out = out; } @Override public Object run() { out.enableReplaceObject(); return null; } } }