/*
*
* 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.qpid.agent.binding;
import java.nio.ByteBuffer;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.qpid.transport.codec.BBDecoder;
import org.apache.qpid.transport.codec.BBEncoder;
import org.apache.qpid.transport.codec.Decoder;
import org.apache.qpid.transport.codec.Encoder;
/**
* Binding information from a java list to a QMF schema.
*/
public class ListBinding implements TypeBinding
{
private static Log log = LogFactory.getLog(ListBinding.class);
protected BindingContext bctx;
protected Class javaClass;
public ListBinding(BindingContext bctx, Class javaClass)
{
this.bctx = bctx;
this.javaClass = javaClass;
}
public void encode(Encoder enc, Object value)
{
List list = (List) value;
BBEncoder newEncoder = new BBEncoder(10);
if (list != null)
{
newEncoder.writeUint32(list.size());
for (Object obj : list)
{
TypeBinding type = bctx.getTypeBinding(obj.getClass());
newEncoder.writeUint8(type.getCode());
type.encode(newEncoder, obj);
}
} else
{
newEncoder.writeUint32(0);
}
enc.writeVbin32(newEncoder.buffer().array());
}
public Object decode(Decoder dec)
{
List list = null;
try
{
list = (List) javaClass.newInstance();
} catch (Exception e)
{
throw new BindingException(
"Could not create a List implementation for "
+ javaClass.getName(), e);
}
BBDecoder newDecoder = new BBDecoder();
newDecoder.init(ByteBuffer.wrap(dec.readVbin32()));
long count = newDecoder.readUint32();
while (count > 0)
{
short typeCode = newDecoder.readUint8();
TypeBinding type = QMFTypeBinding.getType(typeCode);
if (type == null)
{
type = bctx.getTypeBinding(Object.class);
}
list.add(type.decode(newDecoder));
count -= 1;
}
return list;
}
// QMF List Type
public short getCode()
{
return (short) 21;
}
@Override
public Class<?> getJavaClass()
{
return javaClass;
}
@Override
public String getRefClass()
{
return null;
}
@Override
public String getRefPackage()
{
return null;
}
@Override
public boolean isNative()
{
return true;
}
public boolean optionalDefault()
{
return false;
}
}