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 edu.sampleu.travel.bo.TravelAccount;
019import org.kuali.rice.kew.api.identity.Id;
020import org.kuali.rice.kew.api.identity.PrincipalName;
021import org.kuali.rice.kew.api.rule.RoleName;
022import org.kuali.rice.kew.engine.RouteContext;
023import org.kuali.rice.kew.routeheader.DocumentContent;
024import org.kuali.rice.kew.rule.AbstractRoleAttribute;
025import org.kuali.rice.kew.rule.ResolvedQualifiedRole;
026import org.kuali.rice.kns.service.KNSServiceLocator;
027import org.kuali.rice.krad.service.KRADServiceLocator;
028import org.kuali.rice.kns.workflow.WorkflowUtils;
029import org.w3c.dom.Node;
030import org.w3c.dom.NodeList;
031
032import javax.xml.namespace.QName;
033import javax.xml.xpath.XPath;
034import javax.xml.xpath.XPathConstants;
035import javax.xml.xpath.XPathExpressionException;
036import java.util.ArrayList;
037import java.util.Collections;
038import java.util.List;
039
040/**
041 * Resolves FO's using the accounts associated with the document XPath xpath =
042 * KualiWorkflowUtils.getXPath(documentContent.getDocument()); List<String> qualifiers = new ArrayList<String>(); NodeList
043 * accountNums = (NodeList)xstreamSafeEval(xpath, "//edu.sampleu.travel.workflow.bo.TravelAccount/number",
044 * documentContent.getDocument(), XPathConstants.NODESET); for (int i = 0; i < accountNums.getLength(); i++) { Node accountNum =
045 * accountNums.item(i); String accuntNumVal = accountNum.getNodeValue(); }
046 */
047public class AccountAttribute extends AbstractRoleAttribute {
048    private static final RoleName FISCAL_OFFICER_ROLE = new RoleName(AccountAttribute.class.getName(), "FO", "Fiscal Officer");
049    private static final List<RoleName> ROLES;
050    static {
051        List<RoleName> tmp = new ArrayList<RoleName>(1);
052        tmp.add(FISCAL_OFFICER_ROLE);
053        ROLES = Collections.unmodifiableList(tmp);
054    }
055
056
057    public List<String> getQualifiedRoleNames(String roleName, DocumentContent documentContent) {
058        List<String> qualifiedRoleNames = new ArrayList<String>();
059        XPath xpath = WorkflowUtils.getXPath(documentContent.getDocument());
060        // This xpath stream needs updating when the TravelAccount is being updated
061        NodeList accountNums = (NodeList) xstreamSafeEval(xpath, "/documentContent/applicationContent/org.kuali.rice.krad.workflow.KualiDocumentXmlMaterializer/document/travelAccounts/vector/default/elementData/edu.sampleu.travel.bo.TravelAccount/number", documentContent.getDocument(), XPathConstants.NODESET);
062        for (int i = 0; i < accountNums.getLength(); i++) {
063            Node accountNum = accountNums.item(i);
064            String accuntNumVal = accountNum.getTextContent();
065            qualifiedRoleNames.add(accuntNumVal);
066        }
067        return qualifiedRoleNames;
068    }
069
070
071    public List<RoleName> getRoleNames() {
072        return ROLES;
073    }
074
075
076    public ResolvedQualifiedRole resolveQualifiedRole(RouteContext routeContext, String roleName, String qualifiedRole) {
077        String accountNum = qualifiedRole;
078        TravelAccount account = new TravelAccount();
079        account.setNumber(accountNum);
080        account = (TravelAccount) KNSServiceLocator.getBusinessObjectService().retrieve(account);
081        if (account == null) {
082            throw new RuntimeException("Account " + accountNum + " does not exist!");
083        }
084        ResolvedQualifiedRole qualRole = new ResolvedQualifiedRole();
085        qualRole.setAnnotation("Account " + accountNum + " FO");
086        qualRole.setQualifiedRoleLabel("Fiscal Officer Account " + accountNum);
087        List<Id> ids = new ArrayList<Id>();
088        ids.add(new PrincipalName(account.getFiscalOfficer().getUserName()));
089        qualRole.setRecipients(ids);
090        return qualRole;
091    }
092
093
094    /**
095     * This method will do a simple XPath.evaluate, while wrapping your xpathExpression with the xstreamSafe function. It assumes a
096     * String result, and will return such. If an XPathExpressionException is thrown, this will be re-thrown within a
097     * RuntimeException.
098     * 
099     * @param xpath A correctly initialized XPath instance.
100     * @param xpathExpression Your XPath Expression that needs to be wrapped in an xstreamSafe wrapper and run.
101     * @param item The document contents you will be searching within.
102     * @return The string value of the xpath.evaluate().
103     */
104    public static final Object xstreamSafeEval(XPath xpath, String xpathExpression, Object item, QName returnType) {
105        String xstreamSafeXPath = new StringBuilder(WorkflowUtils.XSTREAM_SAFE_PREFIX).append(xpathExpression).append(WorkflowUtils.XSTREAM_SAFE_SUFFIX).toString();
106        try {
107            return xpath.evaluate(xstreamSafeXPath, item, returnType);
108        }
109        catch (XPathExpressionException e) {
110            throw new RuntimeException("XPathExpressionException occurred on xpath: " + xstreamSafeXPath, e);
111        }
112    }
113    }