injecting a custom bean into a metadata filter

[Tom Scavo]

For Rod mainly---

I have two questions about the regex example you added to the
Predicate [1] metadata filter topic:

<bean id="the.Metadata.regexp.Pred"
class="net.shibboleth.utilities.java.support.logic.RegexPredicate"
c:_0="^.*sp1.*" />
<bean id="the.Metadata.Pred"
class="net.shibboleth.ext.spring.util.SpringExpressionPredicate"
        p:customObject-ref="the.Metadata.regexp.Pred"
        c:expression="#custom.apply(#input.getEntityID())" />

1. Where should I put the beans? Inside a metadata provider like any
other metadata filter?

2. Assuming the answer to the previous question is yes, why not
replace the second bean with

<MetadataFilter xsi:type="Predicate" direction="include"
removeEmptyEntitiesDescriptors="true">
    <ConditionScript customObjectRef="the.Metadata.regexp.Pred">
        <Script>
        <![CDATA[
            custom.apply(input.getEntityID());
        ]]>
        </Script>
    </ConditionScript>
</MetadataFilter>

Thanks,

Tom

[1] Predicate https://wiki.shibboleth.net/confluence/x/aAAzAQ