As usual, a new day, a new Mt. Dew, and a re-read of the documentation
fixed my problem. What I actually needed was a betwixt-config file as
described in the derived beans mixed collection example.
Matt
On 5/22/07, Matt Kendall <[EMAIL PROTECTED]> wrote:
OK, so I have a really stupid question, but I've been banging my head
against it all day, so it's time to ask for some help. I have two
mixed content lists, one is a list of Matcher objects and each Matcher
list contains a list of Selector objects. Both Matcher and Selector
are abstract types. Matchers are contained in a Transform object. The
whole thing would look something like this:
public class Transform {
private List<Matcher> matchers = new ArrayList<Matcher>();
public void addMatcher(Matcher matcher) {
matchers.add(matcher);
}
public List<Matcher> getMatchers() {
return matchers;
}
}
public abstract class Matcher {
private List<Selector> selectors = new ArrayList<Selector>();
protected abstract Set<Long> doSomething();
public void addSelector(Selector selector) {
selectors.add(selector);
}
public List<Selector> getSelectors() {
return selectors;
}
}
public abstract class Selector {
public abstract void doSomething();
}
Now, reading the documentation, I found this little gem:
Transformer.betwixt
<info>
<element name="transform">
<element name="matchers">
<element property="matchers" adder="addMatcher"/>
</element>
<addDefaults add-adders="false"/>
</element>
</info>
And, naively, I also created:
AnInstanceOfMatcher.betwixt
<info>
<element name="matcher">
<element name="selectors">
<element property="selectors" adder="addSelector"/>
</element>
<addDefaults add-adders="false"/>
</element>
</info>
Using the latest betwixt 0.8 release this does not, sadly, give me
what I want. Just guessing, it looks like the name="matcher" attribute
from my AnInstanceOfMatcher.betwixt overrides the Transform.betwixt's
naming instructions. Here's my output:
<transform id="3">
<matchers>
<matcher id="4">
<selectors>
<PathFieldSelector id="5">
<path>table.*</path>
</PathFieldSelector>
<NamedFieldSelector id="6">
<name>table</name>
</NamedFieldSelector>
</selectors>
<clazzName>java.util.HashMap</clazzName>
</matcher>
</matchers>
<name>default</name>
</transform>
As you can see, the Selectors are named properly, but the type of the
Matcher remains a mystery. What is the proper way to map this?
Please note that I would prefer a strategy that doesn't require a lot
of extra attributes and elements. Once I get the actual mapping
working, I'll be toning down the complexity of the file so that it can
be easily edited by hand.
Thanks!
Matt
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