001/* 002 * Copyright 2010 Anyware Services 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.ametys.plugins.explorer.dublincore; 017 018import java.io.IOException; 019import java.util.Map; 020 021import org.apache.avalon.framework.service.ServiceException; 022import org.apache.avalon.framework.service.ServiceManager; 023import org.apache.cocoon.ProcessingException; 024import org.apache.cocoon.environment.ObjectModelHelper; 025import org.apache.cocoon.environment.Request; 026import org.apache.cocoon.generation.ServiceableGenerator; 027import org.apache.cocoon.xml.AttributesImpl; 028import org.apache.cocoon.xml.XMLUtils; 029import org.xml.sax.SAXException; 030 031import org.ametys.plugins.explorer.resources.actions.ExplorerResourcesDAO; 032 033/** 034 * Generates Dublin Core metadata. 035 */ 036public class DublinCoreMetadataGenerator extends ServiceableGenerator 037{ 038 private ExplorerResourcesDAO _resourceDAO; 039 040 @Override 041 public void service(ServiceManager serviceManager) throws ServiceException 042 { 043 super.service(serviceManager); 044 _resourceDAO = (ExplorerResourcesDAO) serviceManager.lookup(ExplorerResourcesDAO.ROLE); 045 } 046 047 @Override 048 public void generate() throws IOException, SAXException, ProcessingException 049 { 050 Request request = ObjectModelHelper.getRequest(objectModel); 051 String id = parameters.getParameter("id", request.getParameter("id")); 052 053 Map<String, Object> dcMetadata = _resourceDAO.getDCMetadata(id); 054 055 contentHandler.startDocument(); 056 057 AttributesImpl atts = new AttributesImpl(); 058 atts.addCDATAAttribute("id", id); 059 060 XMLUtils.startElement(contentHandler, "object", atts); 061 062 XMLUtils.startElement(contentHandler, "dublin-core-metadata"); 063 for (String metadataName : dcMetadata.keySet()) 064 { 065 _saxIfNotNull(metadataName, dcMetadata.get(metadataName)); 066 } 067 XMLUtils.endElement(contentHandler, "dublin-core-metadata"); 068 069 XMLUtils.endElement(contentHandler, "object"); 070 071 contentHandler.endDocument(); 072 073 } 074 075 076 /** 077 * SAX string Dublin Core metadata. 078 * @param name the metadata name. 079 * @param value the metadata value. 080 * @throws SAXException if an error occurs while SAXing. 081 */ 082 protected void _saxIfNotNull(String name, Object value) throws SAXException 083 { 084 if (value != null) 085 { 086 if (value instanceof String[]) 087 { 088 for (String val : (String[]) value) 089 { 090 XMLUtils.createElement(contentHandler, name, val); 091 } 092 } 093 else if (value instanceof String) 094 { 095 XMLUtils.createElement(contentHandler, name, (String) value); 096 } 097 else 098 { 099 XMLUtils.createElement(contentHandler, name, String.valueOf(value)); 100 } 101 102 } 103 } 104}