001/**
002 * Copyright 2005-2012 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.kuali.rice.core.api.exception.RiceRuntimeException;
019import org.kuali.rice.core.api.util.xml.XmlHelper;
020import org.kuali.rice.kew.engine.RouteContext;
021import org.kuali.rice.kew.framework.support.krms.RulesEngineExecutor;
022import org.kuali.rice.kew.rule.xmlrouting.XPathHelper;
023import org.kuali.rice.krms.api.engine.Engine;
024import org.kuali.rice.krms.api.engine.EngineResults;
025import org.kuali.rice.krms.api.engine.Facts;
026import org.kuali.rice.krms.api.engine.SelectionCriteria;
027import org.w3c.dom.Document;
028
029import javax.xml.xpath.XPath;
030import javax.xml.xpath.XPathConstants;
031import java.io.ByteArrayInputStream;
032import java.util.Collections;
033import java.util.HashMap;
034import java.util.Map;
035
036/**
037 * A simple sample RulesEngineExecutor usable in the sample app which is hard-coded to select a context with
038 * namespaceCode="KR-SAP" and name="Travel Account ".  It also is hardcoded to select an agenda from the context with an
039 * event name of "workflow".
040 *
041 * @author Kuali Rice Team (rice.collab@kuali.org)
042 */
043public class TravelAccountRulesEngineExecutor implements RulesEngineExecutor {
044
045    private static final String CONTEXT_NAMESPACE_CODE = "KR-SAP";
046    private static final String CONTEXT_NAME = "Travel Account";
047
048    @Override
049    public EngineResults execute(RouteContext routeContext, Engine engine) {
050        Map<String, String> contextQualifiers = new HashMap<String, String>();
051        contextQualifiers.put("namespaceCode", CONTEXT_NAMESPACE_CODE);
052        contextQualifiers.put("name", CONTEXT_NAME);
053        SelectionCriteria sectionCriteria = SelectionCriteria.createCriteria(null, contextQualifiers,
054                Collections.singletonMap("Campus", "BL"));
055
056        // extract facts from routeContext
057        String docContent = routeContext.getDocument().getDocContent();
058
059        String subsidizedPercentStr = getElementValue(docContent, "//newMaintainableObject//subsidizedPercent");
060        String accountTypeCode =
061                getElementValue(docContent, "//newMaintainableObject/dataObject/extension/accountTypeCode");
062        String initiator = getElementValue(docContent, "//documentInitiator//principalId");
063
064        Facts.Builder factsBuilder = Facts.Builder.create();
065
066        factsBuilder.addFact("Subsidized Percent", Double.valueOf(subsidizedPercentStr));
067        factsBuilder.addFact("Account Type Code", accountTypeCode);
068        factsBuilder.addFact("Initiator Principal ID", initiator);
069
070        return engine.execute(sectionCriteria, factsBuilder.build(), null);
071    }
072
073    private String getElementValue(String docContent, String xpathExpression) {
074        try {
075            Document document = XmlHelper.trimXml(new ByteArrayInputStream(docContent.getBytes()));
076
077            XPath xpath = XPathHelper.newXPath();
078            String value = (String)xpath.evaluate(xpathExpression, document, XPathConstants.STRING);
079
080            return value;
081
082        } catch (Exception e) {
083            throw new RiceRuntimeException();
084        }
085    }
086
087//    public static void main(String [] args) throws Exception {
088//
089//        String sampleDocContent = FileUtils.readFileToString(new File("/home/gilesp/tmp/SampleDocContent.txt"));
090//
091//        RouteContext rc = new RouteContext();
092//        DocumentRouteHeaderValue document = new DocumentRouteHeaderValue();
093//        DocumentRouteHeaderValueContent content = new DocumentRouteHeaderValueContent();
094//        content.setDocumentContent(sampleDocContent);
095//        document.setDocumentContent(content);
096//        rc.setDocument(document);
097//
098//        new TravelAccountRulesEngineExecutor().execute(rc, null);
099//    }
100}