Here's the solution I was given. I think it would be easier if we could
reference the item on the stack as an argument.
The trick is to create a new object that takes care of populating the
HashMap for you.
E.g.
// Has to be public, although an anonymous inner class would be great
public class HashMapProxy {
HashMap _map;
public Hashmap Proxy() {
_map = new HashMap();
}
public void addProduct( Product p ) {
_map.put( p.getPartNumber(), p );
}
public HashMap getMap() {
return _map;
}
}
Use the following Digester code:
digester.addObjectCreate( "products", HashMapProxy.class );
digester.addObjectCreate( "products/product", Product.class );
... initialize your Product object
digester.addSetNext( "products/product", "addProduct" );
HashMapProxy proxy = (HashMapProxy)digester.parse( XML );
return proxy.getMap();
Hope that helps, hope they find a better way.
K.C.
> -----Original Message-----
> From: Naresh Bhatia [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, January 23, 2003 9:44 PM
> To: [EMAIL PROTECTED]
> Subject: [Digester] How to specify a <call-param-rule> parameter from
> top-of-stack
>
>
> I am trying to parse an XML file similar to the one shown below:
>
> <products>
> <product partNumber="1000">
> ...
> </product>
> <product partNumber="2000">
> ...
> </product>
> </products>
>
> I want Digester to return a HashMap with partNumber as the key and
> product as the value. How do I put the product on to the HashMap? I
> guess I don't know how <call-param-rule> can specify the
> object from top
> of the stack as a parameter. Here's my unsuccessful attempt at this:
>
> <digester-rules>
> <object-create-rule pattern="products"
> classname="java.util.HashMap"/>
>
> <pattern value="products/product">
> <object-create-rule classname="Product"/>
>
> <set-properties-rule>
> <alias attr-name="partNumber" prop-name="partNumber"/>
> </set-properties-rule>
>
> <call-method-rule methodname="put" paramcount="2"
> paramTypes="java.lang.String,Product"/>
> <call-param-rule paramnumber="0" attrname="partNumber"/>
> <call-param-rule paramnumber="1"/> <--- what to do here?
> </pattern>
>
> </digester-rules>
>
> Thanks.
> Naresh Bhatia
>
