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/***************************************************************************
* Copyright (c) 2004 - 2007 Eike Stepper, Germany.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.net4j.util.stream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
/**
* @author Eike Stepper
*/
public class ExtendedDataInputStream extends DataInputStream implements ExtendedDataInput
{
public ExtendedDataInputStream(InputStream in)
{
super(in);
}
public byte[] readByteArray() throws IOException
{
int length = readInt();
if (length < 0)
{
return null;
}
byte[] b;
try
{
b = new byte[length];
}
catch (Throwable t)
{
throw new IOException("Unable to allocate " + length + " bytes");
}
int bytes = read(b);
if (bytes != length)
{
throw new IOException("Unable to read " + length + " bytes (after " + bytes + " bytes)");
}
return b;
}
public String readString() throws IOException
{
byte[] bytes = readByteArray();
if (bytes == null)
{
return null;
}
return new String(bytes);
}
public Object readObject() throws IOException, ClassNotFoundException
{
ObjectInputStream wrapper = new ObjectInputStream(this);
return wrapper.readObject();
}
}
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