001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.scripting.beanshell;
016    
017    import bsh.Interpreter;
018    
019    import com.liferay.portal.kernel.scripting.BaseScriptingExecutor;
020    import com.liferay.portal.kernel.scripting.ExecutionException;
021    import com.liferay.portal.kernel.scripting.ScriptingException;
022    import com.liferay.portal.kernel.util.AggregateClassLoader;
023    import com.liferay.portal.util.ClassLoaderUtil;
024    
025    import java.util.HashMap;
026    import java.util.Map;
027    import java.util.Set;
028    
029    /**
030     * @author Shuyang Zhou
031     */
032    public class BeanShellExecutor extends BaseScriptingExecutor {
033    
034            public static final String LANGUAGE = "beanshell";
035    
036            @Override
037            public Map<String, Object> eval(
038                            Set<String> allowedClasses, Map<String, Object> inputObjects,
039                            Set<String> outputNames, String script, ClassLoader... classLoaders)
040                    throws ScriptingException {
041    
042                    if (allowedClasses != null) {
043                            throw new ExecutionException(
044                                    "Constrained execution not supported for BeanShell");
045                    }
046    
047                    try {
048                            Interpreter interpreter = new Interpreter();
049    
050                            for (Map.Entry<String, Object> entry : inputObjects.entrySet()) {
051                                    interpreter.set(entry.getKey(), entry.getValue());
052                            }
053    
054                            if ((classLoaders != null) && (classLoaders.length > 0)) {
055                                    ClassLoader aggregateClassLoader =
056                                            AggregateClassLoader.getAggregateClassLoader(
057                                                    ClassLoaderUtil.getPortalClassLoader(), classLoaders);
058    
059                                    interpreter.setClassLoader(aggregateClassLoader);
060                            }
061    
062                            interpreter.eval(script);
063    
064                            if (outputNames == null) {
065                                    return null;
066                            }
067    
068                            Map<String, Object> outputObjects = new HashMap<String, Object>();
069    
070                            for (String outputName : outputNames) {
071                                    outputObjects.put(outputName, interpreter.get(outputName));
072                            }
073    
074                            return outputObjects;
075                    }
076                    catch (Exception e) {
077                            throw new ScriptingException(e.getMessage(), e);
078                    }
079            }
080    
081            @Override
082            public String getLanguage() {
083                    return LANGUAGE;
084            }
085    
086    }