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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.tuscany.sca.databinding.javabeans;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamClass;
import java.io.OutputStream;
import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.logging.Logger;
import org.apache.tuscany.sca.databinding.BaseDataBinding;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.Operation;
/**
* DataBinding for JavaBeans
*
* @version $Rev$ $Date$
*/
public class JavaBeansDataBinding extends BaseDataBinding {
private final static Logger logger = Logger.getLogger(JavaBeansDataBinding.class.getName());
/**
* Defining a weight to a very high number so that the transformer won't be picked
* up by other paths unless it's the only available path
*/
public static final int HEAVY_WEIGHT = 10000;
public static final String NAME = "java:complexType";
public JavaBeansDataBinding() {
super(NAME, Object.class);
}
protected JavaBeansDataBinding(String name, Class<?> baseType) {
super(name, baseType);
}
@Override
public Object copy(Object arg, DataType sourceDataType, DataType targetDataType, Operation sourceOperation, Operation targetOperation) {
if (arg == null) {
return null;
}
final Class<?> clazz = arg.getClass();
if (String.class == clazz || clazz.isPrimitive()
|| Number.class.isAssignableFrom(clazz)
|| Boolean.class.isAssignableFrom(clazz)
|| Character.class.isAssignableFrom(clazz)
|| Byte.class.isAssignableFrom(clazz)) {
// Immutable classes
return arg;
}
try {
if (arg instanceof Serializable) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutputStream oos = getObjectOutputStream(bos);
oos.writeObject(arg);
oos.close();
bos.close();
// Work out which ClassLoader to use for deserializing arg
// We want to use:
// * The ClassLoader of the targetDataType if it is not the System ClassLoader
// * The ClassLoader of arg if it is not the System ClassLoader
// * The ThreadContext ClassLoader if the ClassLoader of arg is the System ClassLoader
// because Collection classes are loaded by the System ClassLoader but their contents
// may be loaded from another ClassLoader
//
final DataType fTargetDataType = targetDataType;
ClassLoader classLoaderToUse = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
public ClassLoader run() {
ClassLoader cl = fTargetDataType.getPhysical().getClassLoader();
return cl;
}
});
if (classLoaderToUse == null) {
classLoaderToUse = clazz.getClassLoader();
}
if (classLoaderToUse == null)
{
// ClassLoader of arg is the System ClassLoader so we will use the ThreadContext ClassLoader
// instead
classLoaderToUse = Thread.currentThread().getContextClassLoader();
}
ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
ObjectInputStream ois = getObjectInputStream(bis, classLoaderToUse);
Object objectCopy = ois.readObject();
ois.close();
bis.close();
return objectCopy;
} else if (arg instanceof Cloneable) {
Method clone;
try {
clone = arg.getClass().getMethod("clone");
try {
return clone.invoke(arg, (Object[])null);
} catch (InvocationTargetException e) {
if (e.getTargetException() instanceof CloneNotSupportedException) {
// Ignore
} else {
throw new IllegalArgumentException(e);
}
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
} catch (NoSuchMethodException e) {
// Ignore it
}
}
// return arg;
logger.warning("Argument type '" + arg.getClass().getName()
+ "' is not Serializable or Cloneable. Pass-by-value is skipped.");
return arg;
} catch (Exception e) {
throw new IllegalArgumentException("Pass-by-value is not supported for the given object: " + arg.getClass()
.getName(), e);
}
}
protected ObjectOutputStream getObjectOutputStream(OutputStream os) throws IOException {
return new ObjectOutputStream(os);
}
protected ObjectInputStream getObjectInputStream(InputStream is, final ClassLoader cl) throws IOException {
ObjectInputStream ois = new ObjectInputStream(is) {
@Override
protected Class<?> resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {
try {
return Class.forName(desc.getName(), false, cl);
} catch (ClassNotFoundException e) {
try {
// For OSGi, use context ClassLoader if the bundle ClassLoader cannot load the class
if (cl != Thread.currentThread().getContextClassLoader()) {
return Class.forName(desc.getName(), false, Thread.currentThread().getContextClassLoader());
}
} catch (ClassNotFoundException e1) {
// ignore
} catch (NoClassDefFoundError e1) {
// ignore
}
return super.resolveClass(desc);
}
}
};
return ois;
}
}
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