001 /**
002 * Copyright 2005-2014 The Kuali Foundation
003 *
004 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
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 */
016 package org.kuali.rice.edl.impl;
017
018 import org.kuali.rice.core.api.util.RiceUtilities;
019 import org.w3c.dom.Document;
020 import org.w3c.dom.Element;
021 import org.w3c.dom.NodeList;
022
023 import javax.xml.parsers.DocumentBuilderFactory;
024 import javax.xml.xpath.XPath;
025 import javax.xml.xpath.XPathConstants;
026 import javax.xml.xpath.XPathFactory;
027 import java.io.InputStream;
028 import java.util.LinkedHashMap;
029 import java.util.Map;
030
031 /**
032 * Builds a EDLGlobalConfig.
033 *
034 * @author Kuali Rice Team (rice.collab@kuali.org)
035 */
036 public class EDLGlobalConfigFactory {
037
038 private static final String CONFIG_PROCESSOR_XPATH_XPRSN = "xpathExp";
039 private static final String CONFIG_PROCESSOR_CLASS_NAME = "className";
040
041
042 public static EDLGlobalConfig createEDLGlobalConfig(String edlConfigLocation) throws Exception {
043 EDLGlobalConfig edlConfig = new EDLGlobalConfig();
044 InputStream configStream = RiceUtilities.getResourceAsStream(edlConfigLocation);
045 Document configXml = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(configStream);
046
047 edlConfig.setPreProcessors(createProcessorMap("//preProcessors/preProcessor", configXml));
048 edlConfig.setPostProcessors(createProcessorMap("//postProcessors/postProcessor", configXml));
049 edlConfig.setStateComponents(createProcessorMap("//stateComponents/stateComponent", configXml));
050 edlConfig.setConfigProcessors(createConfigProcessorMap("//configProcessors/configProcessor", configXml));
051
052 return edlConfig;
053 }
054
055 private static Map createProcessorMap(String xpathExpression, Document doc) throws Exception {
056 Map processors = new LinkedHashMap();//preserve parsing order
057 XPath xpath = XPathFactory.newInstance().newXPath();
058 NodeList globalProcessorDeclarations = (NodeList)xpath.evaluate(xpathExpression, doc, XPathConstants.NODESET);
059 for (int i = 0; i < globalProcessorDeclarations.getLength(); i++) {
060 Element globalProcessorDeclaraion = (Element)globalProcessorDeclarations.item(i);
061 processors.put(globalProcessorDeclaraion, Class.forName(globalProcessorDeclaraion.getFirstChild().getNodeValue()));
062 }
063 return processors;
064 }
065
066 private static Map createConfigProcessorMap(String xpathExpression, Document doc) throws Exception {
067 Map configProcessors = new LinkedHashMap();//preserve parsing order
068 XPath xpath = XPathFactory.newInstance().newXPath();
069 NodeList globalConfigProcessorDeclarations = (NodeList)xpath.evaluate(xpathExpression, doc, XPathConstants.NODESET);
070 for (int i = 0; i < globalConfigProcessorDeclarations.getLength(); i++) {
071 Element globalProcessorDeclaraion = (Element)globalConfigProcessorDeclarations.item(i);
072 String xpathEx = (String)xpath.evaluate(CONFIG_PROCESSOR_XPATH_XPRSN, globalProcessorDeclaraion, XPathConstants.STRING);
073 String className = (String)xpath.evaluate(CONFIG_PROCESSOR_CLASS_NAME, globalProcessorDeclaraion, XPathConstants.STRING);
074 configProcessors.put(xpathEx, Class.forName(className));
075 }
076 return configProcessors;
077 }
078 }