Best way to evaluate several expressions at once?

[David M. Karr]

In my derived Struts-EL tags, I evaluate all of the attributes of a tag in the
same way, all at the same time.  Following this are some examples:

---------------
        try {
            setAltKey((String)ExpressionUtil.
                      evalNotNull("checkbox", "altKey", getAltKey(), 
                                  String.class, this, pageContext));
        } catch (NullAttributeException ex) {
            setAltKey(null);
        }

        try {
            setDisabled(((Boolean)ExpressionUtil.
                         evalNotNull("checkbox", "disabled", getDisabled() + "", 
                                     Boolean.class, this, pageContext)).
                        booleanValue());
        } catch (NullAttributeException ex) {
            setDisabled(false);
        }

        try {
            setCollection(ExpressionUtil.
                          evalNotNull("size", "collection",
                                      getCollectionExpr(), 
                                      Object.class, this, pageContext));
        } catch (NullAttributeException ex) {
            setCollection(null);
        }
---------------

The first two are from the same class, and the third one is from a different
class.  The first attribute is just a string type.  The second one is a
boolean, and the third is a Collection type (Collection or Array).

Every attribute is handled exactly this way (with a little more thought, the
derived classes could be generated from the XML files used to contain the TLD
information and the documentation).

My question to you is, is there a better and/or more efficient way to process a
bunch of EL expressions in a block?  What I have is straightforward, but I'm
wondering if there is a better way to do this.

-- 
===================================================================
David M. Karr          ; Java/J2EE/XML/Unix/C++
[EMAIL PROTECTED]


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