    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.tags;
    020
    021import org.apache.wiki.api.core.Engine;
    022import org.apache.wiki.api.core.Page;
    023import org.apache.wiki.api.exceptions.ProviderException;
    024import org.apache.wiki.pages.PageManager;
    025
    026import java.io.IOException;
    027
    028/**
    029 *  Includes the body in case there is no such page available.
    030 *
    031 *  @since 2.0
    032 */
    033public class NoSuchPageTag extends WikiTagBase {
    034
    035    private static final long serialVersionUID = 0L;
    036
    037    private String m_pageName;
    038
    039    @Override
    040    public void initTag() {
    041        super.initTag();
    042        m_pageName = null;
    043    }
    044
    045    public void setPage( final String name )
    046    {
    047        m_pageName = name;
    048    }
    049
    050    public String getPage()
    051    {
    052        return m_pageName;
    053    }
    054
    055    @Override
    056    public int doWikiStartTag() throws IOException, ProviderException {
    057        final Engine engine = m_wikiContext.getEngine();
    058        final Page page;
    059
    060        if( m_pageName == null ) {
    061            page = m_wikiContext.getPage();
    062        } else {
    063            page = engine.getManager( PageManager.class ).getPage( m_pageName );
    064        }
    065
    066        if( page != null && engine.getManager( PageManager.class ).wikiPageExists( page.getName(), page.getVersion() ) ) {
    067            return SKIP_BODY;
    068        }
    069
    070        return EVAL_BODY_INCLUDE;
    071    }
    072}