/*
* 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.mina.filter.codec.serialization;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInput;
import java.io.StreamCorruptedException;
import org.apache.mina.common.BufferDataException;
import org.apache.mina.common.IoBuffer;
/**
* An {@link ObjectInput} and {@link InputStream} that can read the objects encoded
* by {@link ObjectSerializationEncoder}.
*
* @author The Apache MINA Project (dev@mina.apache.org)
* @version $Rev: 581234 $, $Date: 2007-10-02 22:39:48 +0900 (화, 02 10월 2007) $
*/
public class ObjectSerializationInputStream extends InputStream implements
ObjectInput {
private final DataInputStream in;
private final ClassLoader classLoader;
private int maxObjectSize = 1048576;
public ObjectSerializationInputStream(InputStream in) {
this(in, null);
}
public ObjectSerializationInputStream(InputStream in,
ClassLoader classLoader) {
if (in == null) {
throw new NullPointerException("in");
}
if (classLoader == null) {
classLoader = Thread.currentThread().getContextClassLoader();
}
if (in instanceof DataInputStream) {
this.in = (DataInputStream) in;
} else {
this.in = new DataInputStream(in);
}
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 <tt>1048576</tt> (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 <tt>1048576</tt> (1MB).
*/
public void setMaxObjectSize(int maxObjectSize) {
if (maxObjectSize <= 0) {
throw new IllegalArgumentException("maxObjectSize: "
+ maxObjectSize);
}
this.maxObjectSize = maxObjectSize;
}
@Override
public int read() throws IOException {
return in.read();
}
public Object readObject() throws ClassNotFoundException, IOException {
int objectSize = in.readInt();
if (objectSize <= 0) {
throw new StreamCorruptedException("Invalid objectSize: "
+ objectSize);
}
if (objectSize > maxObjectSize) {
throw new StreamCorruptedException("ObjectSize too big: "
+ objectSize + " (expected: <= " + maxObjectSize + ')');
}
IoBuffer buf = IoBuffer.allocate(objectSize + 4, false);
buf.putInt(objectSize);
in.readFully(buf.array(), 4, objectSize);
buf.position(0);
buf.limit(objectSize + 4);
return buf.getObject(classLoader);
}
public boolean readBoolean() throws IOException {
return in.readBoolean();
}
public byte readByte() throws IOException {
return in.readByte();
}
public char readChar() throws IOException {
return in.readChar();
}
public double readDouble() throws IOException {
return in.readDouble();
}
public float readFloat() throws IOException {
return in.readFloat();
}
public void readFully(byte[] b) throws IOException {
in.readFully(b);
}
public void readFully(byte[] b, int off, int len) throws IOException {
in.readFully(b, off, len);
}
public int readInt() throws IOException {
return in.readInt();
}
/**
* @see DataInput#readLine()
* @deprecated
*/
@Deprecated
public String readLine() throws IOException {
return in.readLine();
}
public long readLong() throws IOException {
return in.readLong();
}
public short readShort() throws IOException {
return in.readShort();
}
public String readUTF() throws IOException {
return in.readUTF();
}
public int readUnsignedByte() throws IOException {
return in.readUnsignedByte();
}
public int readUnsignedShort() throws IOException {
return in.readUnsignedShort();
}
public int skipBytes(int n) throws IOException {
return in.skipBytes(n);
}
}