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.kernel.util.ArrayUtil;
024    import com.liferay.portal.util.ClassLoaderUtil;
025    
026    import java.util.HashMap;
027    import java.util.Map;
028    import java.util.Set;
029    
030    /**
031     * @author Shuyang Zhou
032     */
033    public class BeanShellExecutor extends BaseScriptingExecutor {
034    
035            public static final String LANGUAGE = "beanshell";
036    
037            @Override
038            public Map<String, Object> eval(
039                            Set<String> allowedClasses, Map<String, Object> inputObjects,
040                            Set<String> outputNames, String script, ClassLoader... classLoaders)
041                    throws ScriptingException {
042    
043                    if (allowedClasses != null) {
044                            throw new ExecutionException(
045                                    "Constrained execution not supported for BeanShell");
046                    }
047    
048                    try {
049                            Interpreter interpreter = new Interpreter();
050    
051                            for (Map.Entry<String, Object> entry : inputObjects.entrySet()) {
052                                    interpreter.set(entry.getKey(), entry.getValue());
053                            }
054    
055                            if (ArrayUtil.isNotEmpty(classLoaders)) {
056                                    ClassLoader aggregateClassLoader =
057                                            AggregateClassLoader.getAggregateClassLoader(
058                                                    ClassLoaderUtil.getPortalClassLoader(), classLoaders);
059    
060                                    interpreter.setClassLoader(aggregateClassLoader);
061                            }
062    
063                            interpreter.eval(script);
064    
065                            if (outputNames == null) {
066                                    return null;
067                            }
068    
069                            Map<String, Object> outputObjects = new HashMap<String, Object>();
070    
071                            for (String outputName : outputNames) {
072                                    outputObjects.put(outputName, interpreter.get(outputName));
073                            }
074    
075                            return outputObjects;
076                    }
077                    catch (Exception e) {
078                            throw new ScriptingException(e.getMessage(), e);
079                    }
080            }
081    
082            @Override
083            public String getLanguage() {
084                    return LANGUAGE;
085            }
086    
087    }