I am having trouble matching a digester pattern.. Here is my input xml file..
<catalog>
<book>
<name>Design Patterns in Digester</name>
<isbn>342342234</isbn>
<author>xxx</author>
<specialElem>xxxx <specialElem>
</book>
<catalog>
My object structure has
1) Element class which is basically a name value pair.. So the above xml will create
an element instance when it encounters "Name","ISBN" and "Author".. (I know its a bad
way to represent input xml but I am stuck with this format:()..
2) SpecialElement class which holds the attributes for specialElem
3) Book class which contains a list of elements..
4) Catalog class which holds a list of books.
Here's what I need to do,
1) for every catalog create a catalog
2) for every catalog/book create a new book
3) for every catalog/book/specialElem -> create a new SpecialElement object and add it
to the book
4) for every catalog/book/*-> (elements other than special element) -> create a new
Element object with the name & value of the tag, and add it to the book
Steps 1, 2 and 3 are trivial to do with digester using the following rules.xml
<digester-rules>
<object-create-rule pattern="catalog" classname="Catalog" />
<pattern value="catalog/book">
<object-create-rule classname="Book" />
<pattern value="specialElem">
<object-create-rule classname="SpecialElement" />
<call-method-rule methodname="setSpecial" paramcount="0"/>
<set-next-rule methodname="addSpecialElement" />
</pattern>
<set-next-rule methodname="addBook" />
</pattern>
</digester-rules>
However I donot know how to match wild cards like catalog/book/* .. Does the
'<pattern value="%pattern%">' take regular expressions? What is a good way of solving
this problem (other than fixing the xml :()? Should I create a new rule?
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