/**
* 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.cassandra.db;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import org.apache.cassandra.io.DataOutputBuffer;
/*
* This is the abstraction that pre-processes calls to implmentations
* of the ICompactSerializer2 serialize() via dynamic proxies.
* Author : Avinash Lakshman ( alakshman@facebook.com) & Prashant Malik ( pmalik@facebook.com )
*/
public class CompactSerializerInvocationHandler<T> implements InvocationHandler
{
private ICompactSerializer2<T> serializer_;
public CompactSerializerInvocationHandler(ICompactSerializer2<T> serializer)
{
serializer_ = serializer;
}
/*
* This dynamic runtime proxy adds the indexes before the actual coumns are serialized.
*/
public Object invoke(Object proxy, Method m, Object[] args) throws Throwable
{
/* Do the preprocessing here. */
ColumnFamily cf = (ColumnFamily)args[0];
DataOutputBuffer bufOut = (DataOutputBuffer)args[1];
ColumnIndexer.serialize(cf, bufOut);
return m.invoke(serializer_, args);
}
}