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.log4j.Logger; 022import org.apache.wiki.api.core.Engine; 023import org.apache.wiki.api.core.Page; 024import org.apache.wiki.api.exceptions.ProviderException; 025import org.apache.wiki.attachment.AttachmentManager; 026import org.apache.wiki.pages.PageManager; 027 028 029/** 030 * Includes body if page has attachments. 031 * 032 * @since 2.0 033 */ 034public class HasAttachmentsTag extends WikiTagBase { 035 036 private static final long serialVersionUID = 0L; 037 private static final Logger log = Logger.getLogger( HasAttachmentsTag.class ); 038 039 @Override 040 public final int doWikiStartTag() { 041 final Engine engine = m_wikiContext.getEngine(); 042 final Page page = m_wikiContext.getPage(); 043 final AttachmentManager mgr = engine.getManager( AttachmentManager.class ); 044 045 try { 046 if( page != null && engine.getManager( PageManager.class ).wikiPageExists(page) && mgr.attachmentsEnabled() ) { 047 if( mgr.hasAttachments(page) ) { 048 return EVAL_BODY_INCLUDE; 049 } 050 } 051 } catch( final ProviderException e ) { 052 log.fatal("Provider failed while trying to check for attachements",e); 053 // FIXME: THrow something. 054 } 055 056 return SKIP_BODY; 057 } 058 059}