org.I0Itec.zkclient.serialize.TcclAwareObjectIputStream Maven / Gradle / Ivy
/**
* Copyright 2010 the original author or authors.
*
* Licensed 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.I0Itec.zkclient.serialize;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectStreamClass;
import java.lang.reflect.Proxy;
/**
* An ObjectInputStream that is aware of the TCCL.
*/
public class TcclAwareObjectIputStream extends ObjectInputStream {
public TcclAwareObjectIputStream(InputStream in) throws IOException {
super(in);
}
/**
* Load the local class equivalent of the specified stream class
* description.
* Uses the current class {@link ClassLoader} and falls back to the {@link Thread} context {@link ClassLoader}.
*/
protected Class resolveClass(ObjectStreamClass classDesc) throws IOException, ClassNotFoundException {
try {
return getClass().getClassLoader().loadClass(classDesc.getName());
} catch (ClassNotFoundException ex) {
ClassLoader tccl = Thread.currentThread().getContextClassLoader();
if (tccl != null) {
return tccl.loadClass(classDesc.getName());
} else {
throw ex;
}
}
}
/**
* Returns a proxy class that implements the interfaces named in a proxy
* class descriptor; subclasses may implement this method to read custom
* data from the stream along with the descriptors for dynamic proxy
* classes, allowing them to use an alternate loading mechanism for the
* interfaces and the proxy class.
*
* For each interface uses the current class {@link ClassLoader} and falls back to the {@link Thread} context {@link ClassLoader}.
*/
protected Class resolveProxyClass(String[] interfaces) throws IOException, ClassNotFoundException {
ClassLoader cl = getClass().getClassLoader();
Class[] cinterfaces = new Class[interfaces.length];
for (int i = 0; i < interfaces.length; i++) {
try {
cinterfaces[i] = cl.loadClass(interfaces[i]);
} catch (ClassNotFoundException ex) {
ClassLoader tccl = Thread.currentThread().getContextClassLoader();
if (tccl != null) {
return tccl.loadClass(interfaces[i]);
} else {
throw ex;
}
}
}
try {
return Proxy.getProxyClass(cinterfaces[0].getClassLoader(), cinterfaces);
} catch (IllegalArgumentException e) {
throw new ClassNotFoundException(null, e);
}
}
}