/* * Copyright (c) 2002-2003 by OpenSymphony * All rights reserved. */package com.opensymphony.workflow.util.bsf;import com.opensymphony.module.propertyset.PropertySet;import com.opensymphony.util.TextUtils;import com.opensymphony.workflow.*;import com.opensymphony.workflow.spi.WorkflowEntry;import org.apache.bsf.BSFEngine;import org.apache.bsf.BSFException;import org.apache.bsf.BSFManager;import java.util.Map;/** * Register that invokes a BSF script. * args parameter is expected to contain the follow arguments: * * <li>{@link AbstractWorkflow#BSF_LANGUAGE}: The language of the script * <li>{@link AbstractWorkflow#BSF_SOURCE}: The source of the script * <li>{@link AbstractWorkflow#BSF_ROW}: The row of the script * <li>{@link AbstractWorkflow#BSF_COL}: The column of the script * * @author $Author: hani $ * @version $Revision: 1.4 $ */public class BSFRegister implements Register {    //~ Methods ////////////////////////////////////////////////////////////////    public Object registerVariable(WorkflowContext context, WorkflowEntry entry, Map args, PropertySet ps) throws WorkflowException {        String language = (String) args.get(AbstractWorkflow.BSF_LANGUAGE);        String source = (String) args.get(AbstractWorkflow.BSF_SOURCE);        int row = TextUtils.parseInt((String) args.get(AbstractWorkflow.BSF_ROW));        int col = TextUtils.parseInt((String) args.get(AbstractWorkflow.BSF_COL));        String script = (String) args.get(AbstractWorkflow.BSF_SCRIPT);        BSFManager mgr = new BSFManager();        ClassLoader loader = Thread.currentThread().getContextClassLoader();        if (loader != null) {            mgr.setClassLoader(loader);        }        mgr.registerBean("propertySet", ps);        mgr.registerBean("entry", entry);        mgr.registerBean("context", context);        try {            BSFEngine engine = mgr.loadScriptingEngine(language);            return engine.eval(source, row, col, script);        } catch (BSFException e) {            String message = "Could not get object registered in to variable map";            throw new WorkflowException(message, e);        }    }}