/*
* 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.ode.bpel.o;
import javax.xml.namespace.QName;
import java.io.*;
import java.util.Arrays;
/**
* Header written at the beginning of every compiled BPEL object file.
*/
public class Serializer {
public static final byte[] MAGIC_NUMBER_OFH_20040908 =
new byte[] { 0x55, '5', 'S', 0x00, 'O', 'F', 'H', 0x20, 0x04, 0x09, 0x08 };
public static final byte[] MAGIC_NUMBER_OFH_20061101 =
new byte[] { 0x55, '5', 'S', 0x00, 'O', 'F', 'H', 0x20, 0x06, 0x11, 0x01 };
public static final byte[] MAGIC_NUMBER = MAGIC_NUMBER_OFH_20061101;
public static final short FORMAT_SERIALIZED_JAVA14 = 0x01;
// START PERSISTED FIELDS
public final byte[] magic = new byte[MAGIC_NUMBER.length];
/** Compiled Process representation format. */
public short format;
/** Time of compilation (system local time). */
public long compileTime;
/** Deprecated, only one process per file. */
public final int numProcesses = 1;
public InputStream _inputStream;
public String guid;
// public OProcess _oprocess;
public QName type;
// END PERSISTED FIELDS
public Serializer(long compileTime) {
System.arraycopy(MAGIC_NUMBER, 0, magic, 0, MAGIC_NUMBER.length);
this.format = FORMAT_SERIALIZED_JAVA14;
this.compileTime = compileTime;
}
public Serializer() {}
public Serializer(InputStream inputStream) throws IOException {
_inputStream = inputStream;
read(inputStream);
}
public void read(InputStream is) throws IOException {
DataInputStream oin = new DataInputStream(is);
byte[] magic = new byte[MAGIC_NUMBER.length];
oin.read(magic, 0, magic.length);
if (Arrays.equals(MAGIC_NUMBER_OFH_20040908, magic)) {
// Old format requires us to read the OModel to get the type and guid.
this.format = oin.readShort();
this.compileTime = oin.readLong();
oin.readInt();
ObjectInputStream ois = new CustomObjectInputStream(_inputStream);
OProcess oprocess;
try {
oprocess = (OProcess) ois.readObject();
} catch (ClassNotFoundException e) {
throw new IOException("DataStream Error");
}
this.type = new QName(oprocess.targetNamespace, oprocess.processName);
this.guid = "OLD-FORMAT-NO-GUID";
return;
}
// The current (most recent) scheme
if (Arrays.equals(MAGIC_NUMBER, magic)) {
this.format = oin.readShort();
this.compileTime = oin.readLong();
this.guid = oin.readUTF();
String tns = oin.readUTF();
String name = oin.readUTF();
this.type = new QName(tns, name);
return;
}
throw new IOException("Unrecognized file format (bad magic number).");
}
public void writeOProcess(OProcess process, OutputStream os) throws IOException {
DataOutputStream out = new DataOutputStream(os);
out.write(MAGIC_NUMBER);
out.writeShort(format);
out.writeLong(compileTime);
out.writeUTF(process.guid);
out.writeUTF(process.targetNamespace);
out.writeUTF(process.processName);
out.flush();
ObjectOutputStream oos = new CustomObjectOutputStream(os);
oos.writeObject(process);
oos.flush();
}
public OProcess readOProcess() throws IOException, ClassNotFoundException {
// if (_oprocess != null)
// return _oprocess;
ObjectInputStream ois = new CustomObjectInputStream(_inputStream);
OProcess oprocess;
try {
oprocess = (OProcess) ois.readObject();
} catch (ClassNotFoundException e) {
throw new IOException("DataStream Error");
}
return oprocess;
}
static class CustomObjectOutputStream extends ObjectOutputStream {
/**
* @param out
* @throws IOException
*/
public CustomObjectOutputStream(OutputStream out) throws IOException {
super(out);
enableReplaceObject(true);
}
protected Object replaceObject(Object obj) throws IOException{
if(obj instanceof QName){
QName q = (QName)obj;
return new OQName(q.getNamespaceURI(), q.getLocalPart(), q.getPrefix());
}
return super.replaceObject(obj);
}
}
static class CustomObjectInputStream extends ObjectInputStream {
/**
* @param in
* @throws IOException
*/
public CustomObjectInputStream(InputStream in) throws IOException {
super(in);
enableResolveObject(true);
}
protected Object resolveObject(Object obj) throws IOException {
if(obj instanceof OQName){
OQName q = (OQName)obj;
return new QName(q.uri, q.local, q.prefix);
}
return super.resolveObject(obj);
}
/**
* Override coverts old class names into new class names to preserve compatibility with
* pre-Apache namespaces.
*/
@Override
protected ObjectStreamClass readClassDescriptor() throws IOException, ClassNotFoundException {
ObjectStreamClass read = super.readClassDescriptor();
if (read.getName().startsWith("com.fs.pxe.")) {
return ObjectStreamClass.lookup(Class.forName(read.getName().replace("com.fs.pxe.", "org.apache.ode.")));
}
if (read.getName().startsWith("com.fs.utils.")) {
return ObjectStreamClass.lookup(Class.forName(read.getName().replace("com.fs.utils.", "org.apache.ode.utils.")));
}
return read;
}
}
static class OQName implements Serializable{
private static final long serialVersionUID = 1L;
final String local;
final String uri;
final String prefix;
OQName(String uri, String local, String prefix){
this.uri = uri;
this.local = local;
this.prefix = prefix;
}
}
}