/*
* 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.directory.server.changepw.io;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.apache.directory.server.changepw.messages.ChangePasswordError;
import org.apache.directory.server.changepw.messages.ChangePasswordErrorModifier;
import org.apache.directory.server.kerberos.shared.io.decoder.ErrorMessageDecoder;
import org.apache.directory.server.kerberos.shared.messages.ErrorMessage;
/**
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
* @version $Rev$, $Date$
*/
public class ChangePasswordErrorDecoder
{
private static final int HEADER_LENGTH = 6;
/**
* Decodes a {@link ByteBuffer} into a {@link ChangePasswordError}.
*
* @param buf
* @return The {@link ChangePasswordError}.
* @throws IOException
*/
public ChangePasswordError decode( ByteBuffer buf ) throws IOException
{
ChangePasswordErrorModifier modifier = new ChangePasswordErrorModifier();
short messageLength = buf.getShort();
modifier.setProtocolVersionNumber( buf.getShort() );
// AP_REQ length will be 0 for error messages
buf.getShort(); // authHeader length
int errorLength = messageLength - HEADER_LENGTH;
byte[] errorBytes = new byte[errorLength];
buf.get( errorBytes );
ByteBuffer errorBuffer = ByteBuffer.wrap( errorBytes );
ErrorMessageDecoder errorDecoder = new ErrorMessageDecoder();
ErrorMessage errorMessage = errorDecoder.decode( errorBuffer );
modifier.setErrorMessage( errorMessage );
return modifier.getChangePasswordError();
}
}