org.apache.mina.filter.codec.serialization.ObjectSerializationDecoder Maven / Gradle / Ivy
/**
* Copyright 2007-2015, Kaazing Corporation. All rights reserved.
*
* 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.apache.mina.filter.codec.serialization;
import java.io.Serializable;
import org.apache.mina.core.buffer.BufferDataException;
import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.CumulativeProtocolDecoder;
import org.apache.mina.filter.codec.ProtocolDecoder;
import org.apache.mina.filter.codec.ProtocolDecoderOutput;
/**
* A {@link ProtocolDecoder} which deserializes {@link Serializable} Java
* objects using {@link IoBuffer#getObject(ClassLoader)}.
*
* @author Apache MINA Project
*/
public class ObjectSerializationDecoder extends CumulativeProtocolDecoder {
private final ClassLoader classLoader;
private int maxObjectSize = 1048576; // 1MB
/**
* Creates a new instance with the {@link ClassLoader} of
* the current thread.
*/
public ObjectSerializationDecoder() {
this(Thread.currentThread().getContextClassLoader());
}
/**
* Creates a new instance with the specified {@link ClassLoader}.
*/
public ObjectSerializationDecoder(ClassLoader classLoader) {
if (classLoader == null) {
throw new NullPointerException("classLoader");
}
this.classLoader = classLoader;
}
/**
* Returns the allowed maximum size of the object to be decoded.
* If the size of the object to be decoded exceeds this value, this
* decoder will throw a {@link BufferDataException}. The default
* value is 1048576 (1MB).
*/
public int getMaxObjectSize() {
return maxObjectSize;
}
/**
* Sets the allowed maximum size of the object to be decoded.
* If the size of the object to be decoded exceeds this value, this
* decoder will throw a {@link BufferDataException}. The default
* value is 1048576 (1MB).
*/
public void setMaxObjectSize(int maxObjectSize) {
if (maxObjectSize <= 0) {
throw new IllegalArgumentException("maxObjectSize: "
+ maxObjectSize);
}
this.maxObjectSize = maxObjectSize;
}
@Override
protected boolean doDecode(IoSession session, IoBuffer in,
ProtocolDecoderOutput out) throws Exception {
if (!in.prefixedDataAvailable(4, maxObjectSize)) {
return false;
}
out.write(in.getObject(classLoader));
return true;
}
}