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 edu.sampleu.travel.workflow;
017
018 import org.apache.commons.lang.StringUtils;
019 import org.kuali.rice.core.api.exception.RiceRuntimeException;
020 import org.kuali.rice.core.api.util.xml.XmlHelper;
021 import org.kuali.rice.kew.engine.RouteContext;
022 import org.kuali.rice.kew.framework.support.krms.RulesEngineExecutor;
023 import org.kuali.rice.kew.rule.xmlrouting.XPathHelper;
024 import org.kuali.rice.krms.api.engine.Engine;
025 import org.kuali.rice.krms.api.engine.EngineResults;
026 import org.kuali.rice.krms.api.engine.Facts;
027 import org.kuali.rice.krms.api.engine.SelectionCriteria;
028 import org.w3c.dom.Document;
029
030 import javax.xml.xpath.XPath;
031 import javax.xml.xpath.XPathConstants;
032 import java.io.ByteArrayInputStream;
033 import java.util.Collections;
034 import java.util.HashMap;
035 import java.util.Map;
036
037 /**
038 * A simple sample RulesEngineExecutor usable in the sample app which is hard-coded to select a context with
039 * namespaceCode="KR-SAP" and name="Travel Account ". It also is hardcoded to select an agenda from the context with an
040 * event name of "workflow".
041 *
042 * @author Kuali Rice Team (rice.collab@kuali.org)
043 */
044 public class TravelAccountRulesEngineExecutor implements RulesEngineExecutor {
045
046 private static final String CONTEXT_NAMESPACE_CODE = "KR-SAP";
047 private static final String CONTEXT_NAME = "Travel Account";
048
049 @Override
050 public EngineResults execute(RouteContext routeContext, Engine engine) {
051 Map<String, String> contextQualifiers = new HashMap<String, String>();
052 contextQualifiers.put("namespaceCode", CONTEXT_NAMESPACE_CODE);
053 contextQualifiers.put("name", CONTEXT_NAME);
054 SelectionCriteria sectionCriteria = SelectionCriteria.createCriteria(null, contextQualifiers,
055 Collections.singletonMap("Campus", "BL"));
056
057 // extract facts from routeContext
058 String docContent = routeContext.getDocument().getDocContent();
059
060 String subsidizedPercentStr = getElementValue(docContent, "//newMaintainableObject//subsidizedPercent");
061 String accountTypeCode =
062 getElementValue(docContent, "//newMaintainableObject/dataObject/extension/accountTypeCode");
063 String initiator = getElementValue(docContent, "//documentInitiator//principalId");
064
065 Facts.Builder factsBuilder = Facts.Builder.create();
066
067 if(StringUtils.isNotEmpty(subsidizedPercentStr)) {
068 factsBuilder.addFact("Subsidized Percent", Double.valueOf(subsidizedPercentStr));
069 }
070 factsBuilder.addFact("Account Type Code", accountTypeCode);
071 factsBuilder.addFact("Initiator Principal ID", initiator);
072
073 return engine.execute(sectionCriteria, factsBuilder.build(), null);
074 }
075
076 private String getElementValue(String docContent, String xpathExpression) {
077 try {
078 Document document = XmlHelper.trimXml(new ByteArrayInputStream(docContent.getBytes()));
079
080 XPath xpath = XPathHelper.newXPath();
081 String value = (String)xpath.evaluate(xpathExpression, document, XPathConstants.STRING);
082
083 return value;
084
085 } catch (Exception e) {
086 throw new RiceRuntimeException();
087 }
088 }
089
090 // public static void main(String [] args) throws Exception {
091 //
092 // String sampleDocContent = FileUtils.readFileToString(new File("/home/gilesp/tmp/SampleDocContent.txt"));
093 //
094 // RouteContext rc = new RouteContext();
095 // DocumentRouteHeaderValue document = new DocumentRouteHeaderValue();
096 // DocumentRouteHeaderValueContent content = new DocumentRouteHeaderValueContent();
097 // content.setDocumentContent(sampleDocContent);
098 // document.setDocumentContent(content);
099 // rc.setDocument(document);
100 //
101 // new TravelAccountRulesEngineExecutor().execute(rc, null);
102 // }
103 }