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 */
016package edu.sampleu.travel.workflow;
017
018import org.apache.commons.lang.StringUtils;
019import org.kuali.rice.core.api.exception.RiceRuntimeException;
020import org.kuali.rice.core.api.util.xml.XmlHelper;
021import org.kuali.rice.kew.engine.RouteContext;
022import org.kuali.rice.kew.framework.support.krms.RulesEngineExecutor;
023import org.kuali.rice.kew.rule.xmlrouting.XPathHelper;
024import org.kuali.rice.krms.api.engine.Engine;
025import org.kuali.rice.krms.api.engine.EngineResults;
026import org.kuali.rice.krms.api.engine.Facts;
027import org.kuali.rice.krms.api.engine.SelectionCriteria;
028import org.w3c.dom.Document;
029
030import javax.xml.xpath.XPath;
031import javax.xml.xpath.XPathConstants;
032import java.io.ByteArrayInputStream;
033import java.util.Collections;
034import java.util.HashMap;
035import 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 */
044public 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}