JSP tags parameters type

[Justin Chu]

// props is an array of my custom class.
<logic:iterate id="aAttr" collection="<%=props%>">
From the logic:iterate documentation

The collection to be iterated over MUST conform to one of the following requirements in order for iteration to be successful:
-An array of Java objects or primitives.
-An implementation of java.util.Collection, including ArrayList and Vector.
-An implementation of java.util.Enumeration.
-An implementation of java.util.Iterator.
-An implementation of java.util.Map, including HashMap, Hashtable, and TreeMap.

I am wondering how can a parameter accepts all those different type of Classes/Arrays at the same time?
Is it that in the source code, there are many overloaded functions?

public void setCollection(Object[] array){}
public void setCollection(Collection coll){}
public void setCollection(Enumeration enum){}
.. ...

[Bear Bibeault]

Exactly. Why not just try it out for yourself?
bear
[ January 23, 2003: Message edited by: Bear Bibeault ]

[Marty Hall]

I am wondering how can a parameter accepts all those different type of Classes/Arrays at the same time?
Is it that in the source code, there are many overloaded functions?

Well, if I were writing it, I probably would have a single method that takes an argument of type Object, then do reflection inside my method.
Cheers-
- Marty

[David Hibbs]

Originally posted by Chu Tan:
Is it that in the source code, there are many overloaded functions?

If you look at the code, the answer is 'no' -- it simply uses instanceof several times in order to create an iterator of the appropriate type. The beauty of open source is that the source is exactly that--open. Download it and look through it. You might learn something.