edu.cmu.tetradapp.app.DecompressibleInputStream Maven / Gradle / Ivy
/*
* Copyright (C) 2017 University of Pittsburgh.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
package edu.cmu.tetradapp.app;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectStreamClass;
/**
* This class was embedded in the LoadSessionAction class. Had to make it its own class for reusability.
*
* Dec 6, 2017 11:10:24 AM
*
* @author josephramsey
* @author Kevin V. Bui ([email protected])
*/
public class DecompressibleInputStream extends ObjectInputStream {
// private static final Logger LOGGER = LoggerFactory.getLogger(DecompressibleInputStream.class);
public DecompressibleInputStream(InputStream in) throws IOException {
super(in);
}
@Override
protected ObjectStreamClass readClassDescriptor() throws IOException, ClassNotFoundException {
ObjectStreamClass resultClassDescriptor = super.readClassDescriptor(); // initially streams descriptor
Class localClass; // the class in the local JVM that this descriptor represents.
try {
localClass = Class.forName(resultClassDescriptor.getName());
} catch (ClassNotFoundException e) {
// DecompressibleInputStream.LOGGER.error("No local class for " + resultClassDescriptor.getName(), e);
return resultClassDescriptor;
}
ObjectStreamClass localClassDescriptor = ObjectStreamClass.lookup(localClass);
if (localClassDescriptor != null) { // only if class implements serializable
long localSUID = localClassDescriptor.getSerialVersionUID();
long streamSUID = resultClassDescriptor.getSerialVersionUID();
if (streamSUID != localSUID) { // check for serialVersionUID mismatch.
resultClassDescriptor = localClassDescriptor; // Use local class descriptor for deserialization
}
}
return resultClassDescriptor;
}
}