/* * Copyright (c) 2002-2003 by OpenSymphony * All rights reserved. */package com.opensymphony.workflow.util;import com.opensymphony.module.propertyset.PropertySet;import com.opensymphony.util.TextUtils;import com.opensymphony.workflow.*;import com.opensymphony.workflow.spi.Step;import com.opensymphony.workflow.spi.WorkflowEntry;import com.opensymphony.workflow.spi.WorkflowStore;import java.util.*;/** * Sets the transient variable "mostRecentOwner" to the owner of the most * recent step that had an id equal to one of the values in the stepId list. If there is * none found, the variable is unset. This function accepts the following * arguments: * * <ul> *  <li>stepId - a comma-seperated list of the most recent steps to look for (required)</li> * </ul> * * @author <a href="mailto:plightbo@hotmail.com">Pat Lightbody</a> * @author <a href="mailto:mischwar@cisco.com">Mike Schwartz</a> * @version $Revision: 1.3 $ */public class MostRecentOwner implements FunctionProvider {    //~ Methods ////////////////////////////////////////////////////////////////    public void execute(Map transientVars, Map args, PropertySet ps) throws WorkflowException {        // expects a stepId name/value pair        String stepIdString = (String) args.get("stepId");        WorkflowEntry entry = (WorkflowEntry) transientVars.get("entry");        if (stepIdString == null) {            throw new WorkflowException("This function expects a stepId!");        }        StringTokenizer st = new StringTokenizer(stepIdString, ",");        List stepIds = new LinkedList();        while (st.hasMoreTokens()) {            stepIds.add(st.nextToken().trim());        }        WorkflowStore store = (WorkflowStore) transientVars.get("store");        List historySteps = store.findHistorySteps(entry.getId());        for (Iterator iterator = historySteps.iterator(); iterator.hasNext();) {            Step step = (Step) iterator.next();            if (stepIds.contains(String.valueOf(step.getStepId())) && TextUtils.stringSet(step.getOwner())) {                transientVars.put("mostRecentOwner", step.getOwner());                break;            }        }    }}