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From: Lew <noone@lewscanon.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: JSObject.call(method, ARGS) with Safari
Date: Sat, 21 Apr 2012 13:07:06 -0700
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Richard Maher wrote:
> Arved Sandstrom wrote ..
>> Lew wrote:
>>> ... SSCCE ... [context restored]
>> I agree that an SSCCE is called for in any case.
>>
>
> Thanks for the replies. I'll cut it down to just the jsobject.call(m, ARGS)
> test tomorrow, but for now: -

Thanks for this fragment of your problem. The missing fragment is what went 
wrong. Please copy and paste the actual output or errors and describe what you 
expect instead. You haven't even told us what the error is!

> import java.applet.Applet;
> import netscape.javascript.JSObject;
> import netscape.javascript.JSException;
>
>      public class JavaJSTest extends Applet {
>
>          JSObject              laundry;
>          Object                rinseArgs[]   = new Object[1];
>
>          public synchronized void init() {
>
>              System.out.println("Starting Tests. . .");
>
>              JSObject window = JSObject.getWindow(this);
>
>              final String createLaundry =
>                    "(function(){" +
>                        "function Laundry(){" +
>                            "this.launder = function(JSObject){" +
>                                              "alert('In Laundry');" +
>                                              "return JSObject;}}" +
>                        "return new Laundry();" +
>                        "})();";
>
>              laundry = (JSObject)window.eval(createLaundry);
>
>              // Test function calls
>              String str = (String) window.eval("getString();");
>              if (!str.equals("Hello, world!")) {
>                  throw new RuntimeException(); // test failed
>              }
>              Number num = (Number) window.eval("getNumber()");
>              if (num.intValue() != 5) {
>                  throw new RuntimeException(); // test failed
>              }
>              // Test field access
>              JSObject res = (JSObject) window.eval("new cities();");
>              if (!((String) res.getMember("b")).equals("Belgrade")) {
>                  throw new RuntimeException(); // test failed
>              }
>              res.setMember("b", "Belfast");
>              if (!res.getMember("b").equals("Belfast")) {
>                  throw new RuntimeException(); // test failed
>              }
>              // Test CALL
>              Boolean ans = (Boolean)res.call("d", null);

Could this possibly be where the error occurs?

>              System.out.println("ans is " + ans.booleanValue());

Really, 'System.out.println()'?

Check out java.util.logger or log4j.

>              // Test CALL with param
>              rinseArgs[0] = new String("A param");
>              Boolean pans = (Boolean)res.call("e", rinseArgs);
>              System.out.println("param ans is " + pans.booleanValue());
>
>              // Test array access
>              res = (JSObject) window.eval("getTestArray();");
>              if (!((String) res.getSlot(0)).equals("foo") ||
>                  !((String) res.getSlot(1)).equals("bar")) {
>                  throw new RuntimeException(); // test failed
>              }

Could this possibly be where the error occurs?

>              res.setSlot(1, "baz");
>              if (!((String) res.getSlot(1)).equals("baz")) {
>                  throw new RuntimeException(); // test failed
>              }
>              res.setSlot(2, "qux"); // Define new array element
>              if (!((String) res.getSlot(2)).equals("qux")) {
>                  throw new RuntimeException(); // test failed
>              }
>              res.removeMember("b");
>              try {
>                  res.getMember("b");
> //                throw new RuntimeException(); // test failed

For this sort of thing, 'IllegalStateException' is a good match.

>                  System.out.println("This browser does not support
> removeMember");  // test failed
>              } catch (JSException e) {
>                  // Member should not be present any more
>              }
>
>              System.out.println(". . .Tests complete");
>          }
>
>          public void hello() {
>              System.out.println("Hello");
>          }
>
>          public boolean testCall(JSObject blob) {
>              System.out.println("In method - testCall()");
>
>              JSObject              cleanBuf;
>              boolean               retVal        = false;
>
>              try {
>                  rinseArgs[0] = blob;
>                  System.out.println("before launder");
>                  try {
>                      cleanBuf = (JSObject)laundry.call("launder", rinseArgs);
>                  }
>                  catch (Exception e) {
>                      throw e;
>                  }
>                  System.out.println("after launder");
> //                System.out.println("ans is " + abc.booleanValue());
>
>                  System.out.println("blob.call()");
>                  Boolean resp = (Boolean)cleanBuf.call("e",null);

Could this possibly be where the error occurs?

>                  System.out.println("Setting retVal");
>                  retVal = resp.booleanValue();
>                  } catch (JSException ex) {
>                      Exception ex2 = (Exception)ex.getWrappedException();
>                      if(ex2 != null) {
>                          System.out.println(ex2.getClass().getName() + " " +
> ex2.getMessage());
>                      } else {
>                          System.out.println(ex.getClass().getName() + " " +
> ex.getMessage());
>                      }
>                  } catch (Exception ex) {
>                      System.out.println(ex.getClass().getName() + " " +
> ex.getMessage());
>                  }
>              return retVal;
>          }
>
>      }
>
>
> And the HTML: _
>
> <html>
> <head>
>      <script language="javascript">
>      var app;
>
>      function load() {
>        var objectTag = "<object ";
>
>        if (/Internet Explorer/.test(navigator.appName)) {
>          objectTag = objectTag +
>              'classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" ';
>        } else {
>          objectTag = objectTag +
>              'type="application/x-java-applet" ';
>        }
>
>        objectTag = objectTag +
>            'width= "0" height= "0" id="app">' +
>            '<param name="codebase"        value="http://127.0.0.1">' +
>            '<param name="code"            value="JavaJSTest">' +
>            '<param name="java_version"    value="1.6+">' +
>            '<param name="mayscript"       value="true">' +
>            '<param name="scriptable"      value="true">' +
>       '</object>';
>
>        var appletDiv              = document.createElement("div");
>        appletDiv.innerHTML        = objectTag;
>
>        try {
>          document.body.appendChild(appletDiv);
>          chanG = document.getElementById("app");
>        }
>        catch(err) {
>            alert("Unable to append applet: -\n" +
>                (err.description||err.message));
>            chanG = null;
>        };
>
>        if (chanG == null) {
>          throw new Error("Was unable to initialize the applet");
>        };
>
>        var x = new cities();
>        var y = x.e();
>        alert("X = "+y);
>      }
>
>      // Return a string value to Java
>      function getString() {
>         return "Hello, world!";
>      }
>
>      function getNumber() {
>         return 5;
>      }
>
>      // Make an object with city names and an index letter.
>      function cities() {
>         var msg = "Good Bye";
>         this.a = "Athens";
>         this.b = "Belgrade";
>         this.c = "Cairo";
> //       this.e = function(){alert(msg); return true;};
> //       this.e = function(){if (window.console) {console.log("Message is "
> + msg)};return true;};
> //       this.e = function(){throw("A Wobbly");return true;};
>       }
>
>       cities.prototype = {
>         d : function(){alert("hello"); return true;}
>        ,e : function(){alert("good-Bye"); return true;}
>        ,f : function(param){alert("Param = " + param); return true;}
>       };
>
>       function getTestArray() {
>          return [ "foo", "bar" ];
>       }
>
>       function doIt() {
>        var list = new cities();
>        var reply = chanG.testCall(list);
>        alert("Reply = "+reply);
>       }
>
>      </script>
> </head>
> <body onload="load();">
>
> STUFF
>
> <input type="Button" id="btn1" value="HitMe" onclick="doIt();"/>
>
> </body>
> </html>

-- 
Lew
Honi soit qui mal y pense.
http://upload.wikimedia.org/wikipedia/commons/c/cf/Friz.jpg