Subj : JavaScript vs Java Date
To   : netscape.public.mozilla.jseng
From : Tarek Hammoud
Date : Sat Oct 30 2004 05:58 pm

Hello,

I have this test program which I exepcted to return true. I construct a 
Java date to be 10/30/2004 and an equivalent JS date. However, when I 
compare them by calling getTime(), the result is always false.

Thanks for any pointers.

T Hammoud

> import java.util.Date;
> 
> import org.mozilla.javascript.Context;
> import org.mozilla.javascript.Function;
> import org.mozilla.javascript.Scriptable;
> import org.mozilla.javascript.ScriptableObject;
> import org.mozilla.javascript.WrapFactory;
> 
> public class JavaDate {
>             
>     public void runJavaScriptTest(int n) {
>         
>         Context cx = Context.enter();
>         
>         try {                                    
>             ScriptableObject scope = cx.initStandardObjects();
>             
>             cx.setWrapFactory(new MyWrapFactory());
>             
>             String   s = "function foo(javaConvertedDate) {return new Date(2004, 10, 30).getTime() == javaConvertedDate.getTime()} ";
>             Function f = cx.compileFunction(scope, s, "<cmd>", 1, null);
>             
>             Object args[] = {new Date("10/30/2004")};            
>             Object rc = f.call(cx, scope, f, args);   <================================= It is always false.
>             System.out.println("Test1 Call result " + rc + "  :" + rc.getClass());
> 
>         } catch (Exception e) {
>             e.printStackTrace();
>         }
>         finally {
>         	// Exit from the context.
>         	Context.exit();
>         }    
>     }
>     
>     static class MyWrapFactory extends WrapFactory {
>         public Scriptable wrapAsJavaObject(Context cx,
>         		                           Scriptable scope,
>                                            java.lang.Object javaObject,
>                                            java.lang.Class staticType) {
>             
>             if (javaObject instanceof java.util.Date) {
>                    long time=((java.util.Date) javaObject).getTime();
>                    return cx.newObject(scope, "Date", new Object[] { new Double(time) });
>             }            
>             return super.wrapAsJavaObject(cx, scope, javaObject, staticType);            
>         }
>     }
> 
> 	public static void main(String[] args) {		
> 		JavaDate myTest = new JavaDate();
>         myTest.runJavaScriptTest(1);
> 	}	
> }

.