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/*
*
* 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 org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.qpid.transport.codec.Decoder;
import org.apache.qpid.transport.codec.Encoder;
/**
* Binding information from a java enum to a QMF schema
*/
public class EnumBinding extends ClassBinding
{
private static Log log = LogFactory.getLog(EnumBinding.class);
public EnumBinding(String pkg, String name, Class cls,
boolean exposeBehaviour, BindingContext bctx)
{
super(pkg, name, cls, exposeBehaviour, bctx);
}
@Override
public void encode(Encoder enc)
{
enc.writeUint8((short) 1); // kind
enc.writeStr8(pkg);
enc.writeStr8(name);
enc.writeBin128(new byte[16]); // schema hash
// FIXME Is there a way to send the valid types?
}
@Override
public void encode(Encoder enc, Object value)
{
if (value != null)
{
enc.writeStr16(value.toString());
} else
{
enc.writeStr16("");
}
}
@Override
public Object decode(Decoder dec)
{
// FIXME This only works with POJOs
Object instance = null;
String value = null;
try
{
value = dec.readStr16();
if ((value != null) && (!value.isEmpty()))
{
instance = Enum.valueOf((Class<Enum>) this.getJavaClass(),
value);
}
} catch (Exception e)
{
log.error(String.format(
"Could not create an enum of type %s with value %s",
this.javaClass.getName(), value));
throw new BindingException(e);
}
return instance;
}
// Make this look like a String
@Override
public short getCode()
{
return (short) 7;
}
@Override
public EnumBinding parse()
{
log.debug(String.format(
"Parsing enum binding '%s' for package '%s' from class %s",
name, pkg, javaClass.getName()));
return this;
}
@Override
public boolean optionalDefault()
{
return false;
}
}
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