001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.geronimo.kernel.config; 018 019 import java.io.OutputStream; 020 import java.io.IOException; 021 import java.io.ObjectOutputStream; 022 import java.io.InputStream; 023 import java.io.ObjectInputStream; 024 import java.io.ObjectStreamConstants; 025 import java.io.PushbackInputStream; 026 import java.util.Collection; 027 028 /** 029 * @version $Rev: 549825 $ $Date: 2007-06-22 10:17:31 -0400 (Fri, 22 Jun 2007) $ 030 */ 031 public class SerializedConfigurationMarshaler implements ConfigurationMarshaler { 032 private static byte[] SERIALIZED_MAGIC = new byte[] { 033 (byte) ((ObjectStreamConstants.STREAM_MAGIC >>> 8) & 0xFF), 034 (byte) ((ObjectStreamConstants.STREAM_MAGIC >>> 0) & 0xFF) 035 }; 036 037 public ConfigurationData readConfigurationData(InputStream in) throws IOException, ClassNotFoundException { 038 PushbackInputStream pushbackInputStream = new PushbackInputStream(in, 2); 039 byte[] streamHeader = new byte[2]; 040 if (pushbackInputStream.read(streamHeader) != 2) throw new AssertionError("Cound not read stream header"); 041 pushbackInputStream.unread(streamHeader); 042 043 // if this isn't a serialized config, fallback to the xstream marshaler 044 if (SERIALIZED_MAGIC[0] != streamHeader[0] || SERIALIZED_MAGIC[1] != streamHeader[1]) { 045 ConfigurationMarshaler marshaler; 046 try { 047 marshaler = ConfigurationUtil.createConfigurationMarshaler("org.apache.geronimo.kernel.config.xstream.XStreamConfigurationMarshaler"); 048 } catch (Throwable ignored) { 049 throw (IOException)new IOException("Input does not contain a Java Object Serialization stream").initCause(ignored); 050 } 051 return marshaler.readConfigurationData(pushbackInputStream); 052 053 } 054 055 ObjectInputStream oin = new ObjectInputStream(pushbackInputStream); 056 try { 057 return (ConfigurationData) oin.readObject(); 058 } finally { 059 oin.close(); 060 } 061 } 062 063 public void writeConfigurationData(ConfigurationData configurationData, OutputStream out) throws IOException { 064 ObjectOutputStream oout = new ObjectOutputStream(out); 065 try { 066 oout.writeObject(configurationData); 067 } finally { 068 if (oout != null) { 069 try { 070 oout.flush(); 071 } catch (IOException ignored) { 072 } 073 } 074 } 075 } 076 077 public GBeanState newGBeanState(Collection gbeans) { 078 return new SerializedGBeanState(gbeans); 079 } 080 }