/*
* 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.jena.tdb.base.objectfile;
/**
* An ObjectFile is an append-read file, that is you can append data
* to the stream or read any block.
*/
public class ObjectFileSwitcher extends ObjectFileWrapper
{
protected final ObjectFile objFile1 ;
protected final ObjectFile objFile2 ;
public ObjectFileSwitcher(ObjectFile objFile1, ObjectFile objFile2)
{
super(objFile1) ;
this.objFile1 = objFile1 ;
this.objFile2 = objFile2 ;
}
public final void switchover()
{
if ( super.other == objFile1 )
super.other = objFile2 ;
else
super.other = objFile1 ;
}
}