001
014
015 package com.liferay.portal.scripting.javascript;
016
017 import com.liferay.mozilla.javascript.Context;
018 import com.liferay.mozilla.javascript.Script;
019 import com.liferay.mozilla.javascript.Scriptable;
020 import com.liferay.mozilla.javascript.ScriptableObject;
021 import com.liferay.portal.kernel.cache.SingleVMPoolUtil;
022 import com.liferay.portal.kernel.scripting.ScriptingException;
023 import com.liferay.portal.kernel.scripting.ScriptingExecutor;
024
025 import java.util.HashMap;
026 import java.util.Map;
027 import java.util.Set;
028
029
032 public class JavaScriptExecutor implements ScriptingExecutor {
033
034 public static final String CACHE_NAME = JavaScriptExecutor.class.getName();
035
036 public static final String LANGUAGE = "javascript";
037
038 public void clearCache() {
039 SingleVMPoolUtil.clear(CACHE_NAME);
040 }
041
042 public String getLanguage() {
043 return LANGUAGE;
044 }
045
046 public Map<String, Object> eval(
047 Set<String> allowedClasses, Map<String, Object> inputObjects,
048 Set<String> outputNames, String script)
049 throws ScriptingException {
050
051 Script compiledScript = getCompiledScript(script);
052
053 try {
054 Context context = Context.enter();
055
056 Scriptable scriptable = context.initStandardObjects();
057
058 for (String varName: inputObjects.keySet()) {
059 ScriptableObject.putProperty(
060 scriptable, varName,
061 Context.javaToJS(inputObjects.get(varName), scriptable));
062 }
063
064 if (allowedClasses != null) {
065 context.setClassShutter(
066 new JavaScriptClassVisibilityChecker(allowedClasses));
067 }
068
069 compiledScript.exec(context, scriptable);
070
071 if (outputNames == null) {
072 return null;
073 }
074
075 Map<String, Object> outputObjects = new HashMap<String, Object>();
076
077 for (String outputName : outputNames) {
078 outputObjects.put(
079 outputName,
080 ScriptableObject.getProperty(scriptable, outputName));
081 }
082
083 return outputObjects;
084 }
085 catch (Exception e) {
086 throw new ScriptingException(e.getMessage() + "\n\n", e);
087 }
088 finally {
089 Context.exit();
090 }
091 }
092
093 protected Script getCompiledScript(String script) {
094 String key = String.valueOf(script.hashCode());
095
096 Script compiledScript = (Script)SingleVMPoolUtil.get(CACHE_NAME, key);
097
098 if (compiledScript == null) {
099 try {
100 Context context = Context.enter();
101
102 compiledScript = context.compileString(
103 script, "script", 0, null);
104 }
105 finally {
106 Context.exit();
107 }
108
109 SingleVMPoolUtil.put(CACHE_NAME, key, compiledScript);
110 }
111
112 return compiledScript;
113 }
114
115 }