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https://issues.apache.org/activemq/browse/CAMEL-772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44634#action_44634
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Claus Ibsen commented on CAMEL-772:
-----------------------------------
Here is a snippet how I have prototyped the constains() predicate (a bit quick
and dirty) but good for show and tell:
{code}
public static <E extends Exchange> Predicate<E> contains(final
Expression<E> left,
final
Expression<E> right) {
return new BinaryPredicateSupport<E>(left, right) {
protected boolean matches(E exchange, Object leftValue, Object
rightValue) {
Object castedValue =
exchange.getContext().getTypeConverter().convertTo(rightValue.getClass(),
leftValue);
if (castedValue != null) {
return ObjectHelper.contains(castedValue, rightValue);
} else {
return ObjectHelper.contains(leftValue, rightValue);
}
}
protected String getOperationText() {
return "contains";
}
};
}
{code}
> Predicates with two types should consider casting to desired type before
> evaluating
> -----------------------------------------------------------------------------------
>
> Key: CAMEL-772
> URL: https://issues.apache.org/activemq/browse/CAMEL-772
> Project: Apache Camel
> Issue Type: Improvement
> Components: camel-core
> Affects Versions: 1.4.0
> Reporter: Claus Ibsen
>
> I had this unit test where I want to assert that the message body contains
> this string part
> {code}
> MockEndpoint error = getMockEndpoint("mock:errorQueue");
> error.expectedMessageCount(1);
>
> error.message(0).body().contains("<patientCpr>0101701234</patientCpr>");
> {code}
> But the expression fails because the body is byte array and is not casted to
> String as the contains type is.
> If I change the code to:
> {code}
>
> error.message(0).body().convertTo(String.class).contains("<patientCpr>0101701234</patientCpr>");
> {code}
> Then it of course works. But what if there already is a type convert in Camel
> that could have done the cast for me?
> But is it dangerous to add such automatic type casting behind the end-users
> back? Any thoughts?
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