001/* 
002    Licensed to the Apache Software Foundation (ASF) under one
003    or more contributor license agreements.  See the NOTICE file
004    distributed with this work for additional information
005    regarding copyright ownership.  The ASF licenses this file
006    to you under the Apache License, Version 2.0 (the
007    "License"); you may not use this file except in compliance
008    with the License.  You may obtain a copy of the License at
009
010       http://www.apache.org/licenses/LICENSE-2.0
011
012    Unless required by applicable law or agreed to in writing,
013    software distributed under the License is distributed on an
014    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015    KIND, either express or implied.  See the License for the
016    specific language governing permissions and limitations
017    under the License.  
018 */
019package org.apache.wiki.providers;
020
021/**
022 *  This is a provider interface which providers can implement, if they
023 *  support fast checks of versions.
024 *  <p>
025 *  Note that this interface is pretty much a hack to support certain functionality
026 *  before a complete refactoring of the complete provider interface.  Please
027 *  don't bug me too much about it...
028 *  
029 *
030 *  @since 2.3.29
031 */
032public interface VersioningProvider
033{
034    /**
035     *  Return true, if page with a particular version exists.
036     *  
037     *  @param page The page name to check for
038     *  @param version The version to check
039     *  @return True, if page exists; false otherwise.
040     */
041    boolean pageExists( String page, int version );
042}