[digester] Pass a static value to a CallParam rule?

[Christopher Schultz <ch...@christopherschultz.net>]

All,

I'd like to invoke a method on the current top-of-the-stack object and 
pass a static string value to it, like this:


digester.push(new MyBean());
digester.addCallMethod("/Foo/Bar", "setAttribute", 2, new Class<?>[] { 
String.class });
digester.addCallParam("/Foo/Bar", 0, "MyStaticString");
digester.addCallParam("/Foo/Bar", 1, "attrName");
digester.parse(...);

When encountering /Foo/Bar, I'd like this to be called:

myBean.setAttribute("MyStaticString", [value of attribute "attrName"])

Is that kind of thing possible?

I thought I might pull a fast one and push the value "MyStaicString" 
onto the stack and call:

digester.addCallParam("/Foo/Bar", 0, true);

But I it seems I can't push a value onto the stack when a specific path 
is seen: only statically at some specific point (like before parsing 
begins).

Thanks,
-chris

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Re: [digester] Pass a static value to a CallParam rule?

[Christopher Schultz <ch...@christopherschultz.net>]

All,

On 2/16/21 15:31, Christopher Schultz wrote:
> All,
> 
> I'd like to invoke a method on the current top-of-the-stack object and 
> pass a static string value to it, like this:
> 
> 
> digester.push(new MyBean());
> digester.addCallMethod("/Foo/Bar", "setAttribute", 2, new Class<?>[] { 
> String.class });
> digester.addCallParam("/Foo/Bar", 0, "MyStaticString");
> digester.addCallParam("/Foo/Bar", 1, "attrName");
> digester.parse(...);
> 
> When encountering /Foo/Bar, I'd like this to be called:
> 
> myBean.setAttribute("MyStaticString", [value of attribute "attrName"])
> 
> Is that kind of thing possible?
> 
> I thought I might pull a fast one and push the value "MyStaicString" 
> onto the stack and call:
> 
> digester.addCallParam("/Foo/Bar", 0, true);
> 
> But I it seems I can't push a value onto the stack when a specific path 
> is seen: only statically at some specific point (like before parsing 
> begins).

Konstanin Kolinko in the Tomcat-user list pointed me toward:

digester.addObjectParam("/Foo/Bar", 0, "MyStaticString");
digester.addCallParam("/Foo/Bar", 1, "attrName");

This will accomplish what I'm trying to do.

Thanks!
-chris

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