Examples of bsh.Interpreter

bsh.Interpreter
uate statements and expressions bsh.eval("foo=Math.sin(0.5)"); bsh.eval("bar=foo*5; bar=Math.cos(bar);"); bsh.eval("for(i=0; i<10; i++) { print(\"hello\"); }"); // same as above using java syntax and apis only bsh.eval("for(int i=0; i<10; i++) { System.out.println(\"hello\"); }"); // Source from files or streams bsh.source("myscript.bsh"); // or bsh.eval("source(\"myscript.bsh\")"); // Use set() and get() to pass objects in and out of variables bsh.set( "date", new Date() ); Date date = (Date)bsh.get( "date" ); // This would also work: Date date = (Date)bsh.eval( "date" ); bsh.eval("year = date.getYear()"); Integer year = (Integer)bsh.get("year"); // primitives use wrappers // With Java1.3+ scripts can implement arbitrary interfaces... // Script an awt event handler (or source it from a file, more likely) bsh.eval( "actionPerformed( e ) { print( e ); }"); // Get a reference to the script object (implementing the interface) ActionListener scriptedHandler = (ActionListener)bsh.eval("return (ActionListener)this"); // Use the scripted event handler normally... new JButton.addActionListener( script );
In the above examples we showed a single interpreter instance, however you may wish to use many instances, depending on the application and how you structure your scripts. Interpreter instances are very light weight to create, however if you are going to execute the same script repeatedly and require maximum performance you should consider scripting the code as a method and invoking the scripted method each time on the same interpreter instance (using eval()).
See the BeanShell User's Manual for more information.

     */
    public String getStyleAltRowStyle(Map<String, Object> context) {
        String styles = "";
        try {
            // use the same Interpreter (ie with the same context setup) for all evals
            Interpreter bsh = this.getBshInterpreter(context);
            for (AltRowStyle altRowStyle : this.altRowStyles) {
                Object retVal = bsh.eval(StringUtil.convertOperatorSubstitutions(altRowStyle.useWhen));
                // retVal should be a Boolean, if not something weird is up...
                if (retVal instanceof Boolean) {
                    Boolean boolVal = (Boolean) retVal;
                    if (boolVal.booleanValue()) {
                        styles += altRowStyle.style;

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  public BeanShellAssertion()
  {
    String init="";
    try{
      bshInterpreter = new Interpreter();
      init = JMeterUtils.getPropDefault(INIT_FILE,null);
      if (init != null)
      {
        try
        {

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  public BeanShellSampler()
  {
    String init="";
    try{
      bshInterpreter = new Interpreter();
      init = JMeterUtils.getPropDefault(INIT_FILE,null);
      if (init != null)
      {
        try
        {

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        code=new String(buf);


        // create interpreter just-in-time
        if(interpreter == null) {
            interpreter=new Interpreter();


                if(log.isInfoEnabled()) log.info("beanshell interpreter was created");
            try {
                interpreter.set("bsh_prot", this);

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    public static void main(String[] args) throws Exception {
        new BshCommand().execute(args);
    }


    public void execute() throws Exception {
        Interpreter bsh = null;
        Object ret;
        boolean interactive = false;
        InputStream in = getInput().getInputStream();
        OutputStream out = getOutput().getOutputStream();
        OutputStream err = getError().getOutputStream();
        if (FLAG_INTERACTIVE.isSet()) {
            bsh = createInterpreter(in, out, err, true);
            interactive = true;
        }


        if (ARG_CODE.isSet()) {
            if (bsh == null) {
                bsh = createInterpreter(in, out, err, false);
            }
            String code = ARG_CODE.getValue();
            ret = bsh.eval(code);


            if (ret != null) {
                out.write((ret + "\n").getBytes());
            }
        }


        if (ARG_FILE.isSet()) {
            if (bsh == null) {
                bsh = createInterpreter(in, out, err, false);
            }


            String file = ARG_FILE.getValue().toString();
            ret = bsh.source(file);


            if (ret != null) {
                out.write((ret + "\n").getBytes());
            }
        }
        out.flush();


        if (bsh == null) {
            // If no arguments were given, default to interactive mode.
            bsh = createInterpreter(in, out, err, true);
            interactive = true;
        }


        if (interactive) {
            bsh.run();
        }
    }

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    }


    private Interpreter createInterpreter(
            InputStream in, OutputStream out, OutputStream err, boolean interactive)
        throws Exception {
        Interpreter interpreter = new Interpreter(
                new BufferedReader(new InputStreamReader(in)),
                new PrintStream(out),
                new PrintStream(err), interactive);
        if (interactive) {
            interpreter.eval("show();");
        }
        return interpreter;
    }

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    return bshInerp.eval(expression);
  }


  public static synchronized Object getBeanShell() throws Exception {
    if (bshInerp == null) 
      bshInerp = new Interpreter();


    for (Iterator<String> iterator = pageVars.iterator(); iterator.hasNext();)
    {
      String key = iterator.next();
      bshInerp.set(key, Fixture.getSymbol(key));

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      if (useConsole)
      {
         String welcomeMessage = getWelcomeMessage();


         bshConsole = new JConsole();
         Interpreter interpreter = new Interpreter(bshConsole);


         configureInterpreter(interpreter, cacheDelegate);


         interpreter.println(welcomeMessage);
         interpreter.setShowResults(!interpreter.getShowResults());// show() in beanShell
         System.setOut(bshConsole.getOut());
         System.setErr(bshConsole.getErr());
         Thread t = new Thread(interpreter);
         t.start();

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        public boolean shouldUse(Map<String, Object> context) {
            boolean shouldUse = true;
            String useWhen = this.getUseWhen(context);
            if (UtilValidate.isNotEmpty(useWhen)) {
                try {
                    Interpreter bsh = (Interpreter) context.get("bshInterpreter");
                    if (bsh == null) {
                        bsh = BshUtil.makeInterpreter(context);
                        context.put("bshInterpreter", bsh);
                    }


                    Object retVal = bsh.eval(StringUtil.convertOperatorSubstitutions(useWhen));


                    // retVal should be a Boolean, if not something weird is up...
                    if (retVal instanceof Boolean) {
                        Boolean boolVal = (Boolean) retVal;
                        shouldUse = boolVal.booleanValue();

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        String useWhenStr = this.getUseWhen(context);
        if (UtilValidate.isEmpty(useWhenStr)) {
            return true;
        } else {
            try {
                Interpreter bsh = this.modelForm.getBshInterpreter(context);
                Object retVal = bsh.eval(StringUtil.convertOperatorSubstitutions(useWhenStr));
                boolean condTrue = false;
                // retVal should be a Boolean, if not something weird is up...
                if (retVal instanceof Boolean) {
                    Boolean boolVal = (Boolean) retVal;
                    condTrue = boolVal.booleanValue();

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