[classad-users] A question regarding how to use classad with the Java implementation.

[Gabriele Pierantoni <pierantg@xxxxxxxxx>]

Dear Sir/Madame,

	I'm trying to learn the ClassAd java library (Version 2.2)
for my research and I am having problems in understanding the use of
indented classads.

I have a problem with indented classads.

I have a test classad.

--------------------------------------------
String	p1 = new String(
		"[" +
		"value = 10;" +
		"inner = " +
			"[" +
			"v = root.value;" +
			"];" +
		"];");
--------------------------------------------


I create a RecordExpr with this String:

-----------------------------------------------------------
ClassAdParser	parser	=	new ClassAdParser(p1);
RecordExpr	expr1	=	(RecordExpr) parser.parse();
-----------------------------------------------------------

And I try to evaluate the various expressions:

		
System.out.println("- expr1 : " + expr1.eval());
System.out.println("- expr1.value : " + expr1.lookup("value").eval());
System.out.println("- expr1.inner : " + expr1.lookup("inner").eval());
System.out.println("- expr1.inner.v : " 
+((RecordExpr)expr1.lookup("inner")).lookup("v").eval());

The problem is that the value of v in the inner classad is undefined
and I cannot understand why. Probably the lookup function is restricting
the scope.

-----------------------------------------
- expr1 : [value=10;inner=[v=root.value]]
- expr1.value : 10
- expr1.inner : [v=root.value]
- expr1.inner.v : UNDEFINED
-----------------------------------------

I was wondering if you could give me pointer to any documentation
(expecially regarding the Java implementation) besides the papers
listed in the ClassAd website or put me in contact with anybody
able to help me.

I am very grateful for any help you could provide.

	All the very best,

			Gabriele Pierantoni

--
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