rhinoとenv.rhino.jsでjs関数を実行するには？

Question

Scriptable envGlobals; 

     InputStreamReader envReader = new InputStreamReader(getClass() 
       .getResourceAsStream("env.rhino.js")); 
//  InputStreamReader jqueryReader = new InputStreamReader(getClass() 
//    .getResourceAsStream("jquery-1.6.2.js")); 
     try { 
      Context cx = ContextFactory.getGlobal().enterContext(); 
      try { 
       Global global = new Global(); 
       global.init(cx); 
       cx.setOptimizationLevel(-1); 
       cx.setLanguageVersion(Context.VERSION_1_7); 

       envGlobals = cx.initStandardObjects(global); 
       try { 
        cx.evaluateReader(envGlobals, envReader, 
          "env.rhino.js", 1, null); 
//     cx.evaluateReader(envGlobals, jqueryReader, 
//       "jquery-1.6.2.js", 1, null); 
       } catch (IOException e) { 

       } 
      } finally { 
       Context.exit(); 
      } 
     } finally { 
      try { 
       envReader.close(); 
      } catch (IOException e) { 

      } 
     } 

     /** 
     * the above code nicely evaluates env.rhino.js and provides a scope 
     * object (envGlobals). Then for each script I want to evaluate 
     * against env.rhino.js's global scope: 
     */ 

     Context scriptContext = ContextFactory.getGlobal().enterContext(); 
     try { 
      // Create a global scope for the dependency we're processing 
      // and assign our prototype to the environment globals 
      // (env.js defined globals, the console globals etc.). This 
      // then allows us to (a) not have to re-establish commonly 
      // used globals i.e. we can re-use them in our loop; and (b) 
      // any global assignments are guaranteed to have come from 
      // the dependency itself (which is what we're trying to 
      // determine here). 
      Scriptable globalScope = scriptContext.newObject(envGlobals); 
      globalScope.setPrototype(envGlobals); 
      globalScope.setParentScope(null); 

      scriptContext.setOptimizationLevel(-1); 
      scriptContext.setLanguageVersion(Context.VERSION_1_7); 

      try { 
       //scriptContext.evaluateString(globalScope, "window.location='http://www.amazon.com'", "location", 1, null); 
       scriptContext.evaluateString(globalScope, tree.toSource(), "script document", 1, null); 
       System.out.println(scriptContext.toString()); 

       // TODO: Do something useful with the globals. 


      } finally { 
       Context.exit(); 
      } 
.... 

Function f = (Function)fObj; 
Object result = f.call(scriptContext, globalScope, globalScope, params); 

throught this format,i always get the Exception info: 
    Exception in thread "main" java.lang.NullPointerException 
    at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:849) 
    at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:164) 
    at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:426) 
    at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3178) 
    at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:162) 
    at org.sdc.food.parse.util.JavaScriptParser.getExecutableJS(JavaScriptParser.java:244) 
    at org.sdc.food.parse.util.JavaScriptParser.main(JavaScriptParser.java:349) 

pls、someone help me !!

Answer 1

私はこれを解決しました。その理由は、呼び出された関数に渡されたパラメータが間違っているためです。