Re: What is the correct way to build a Predicate from an Expression?

[Steve973]

Thank you.  That worked well!

Steve

On Mon, Jan 17, 2022 at 12:18 PM Claus Ibsen  wrote:

> Hi
>
> Language lan = context.resolveLanguage("simple")
> Predicate p = lan.createPredicate()
> p.init(context)
>
>
>
> On Mon, Jan 17, 2022 at 5:50 PM Steve973  wrote:
> >
> > Hello.  I am trying to create a Predicate from an Expression.  The
> > Expression is created from a String.  This is what I am trying to do:
> >
> > String language = "simple";
> > String value = "${body} contains 'test'";
> > Expression expression = ExpressionBuilder.languageExpression(language,
> > value);
> > Predicate predicate = PredicateBuilder.toPredicate(expression);
> >
> > My debugging output *looks* like I am creating it properly:
> > predicate: language[simple:${body} contains 'test']
> >
> > But when I try to use this when processing an Exchange, I am getting a
> null
> > pointer exception:
> > java.lang.NullPointerException: null
> > at
> >
> org.apache.camel.support.builder.ExpressionBuilder$22.matches(ExpressionBuilder.java:784)
> > ~[camel-support-3.15.0-SNAPSHOT.jar:3.15.0-SNAPSHOT]
> >
> > Can anyone give me an idea about what I might be missing?
> >
> > Thanks,
> > Steve
>
>
>
> --
> Claus Ibsen
> -
> http://davsclaus.com @davsclaus
> Camel in Action 2: https://www.manning.com/ibsen2
>

Re: What is the correct way to build a Predicate from an Expression?

[Claus Ibsen]

Hi

Language lan = context.resolveLanguage("simple")
Predicate p = lan.createPredicate()
p.init(context)



On Mon, Jan 17, 2022 at 5:50 PM Steve973  wrote:
>
> Hello.  I am trying to create a Predicate from an Expression.  The
> Expression is created from a String.  This is what I am trying to do:
>
> String language = "simple";
> String value = "${body} contains 'test'";
> Expression expression = ExpressionBuilder.languageExpression(language,
> value);
> Predicate predicate = PredicateBuilder.toPredicate(expression);
>
> My debugging output *looks* like I am creating it properly:
> predicate: language[simple:${body} contains 'test']
>
> But when I try to use this when processing an Exchange, I am getting a null
> pointer exception:
> java.lang.NullPointerException: null
> at
> org.apache.camel.support.builder.ExpressionBuilder$22.matches(ExpressionBuilder.java:784)
> ~[camel-support-3.15.0-SNAPSHOT.jar:3.15.0-SNAPSHOT]
>
> Can anyone give me an idea about what I might be missing?
>
> Thanks,
> Steve



-- 
Claus Ibsen
-
http://davsclaus.com @davsclaus
Camel in Action 2: https://www.manning.com/ibsen2

What is the correct way to build a Predicate from an Expression?

[Steve973]

Hello.  I am trying to create a Predicate from an Expression.  The
Expression is created from a String.  This is what I am trying to do:

String language = "simple";
String value = "${body} contains 'test'";
Expression expression = ExpressionBuilder.languageExpression(language,
value);
Predicate predicate = PredicateBuilder.toPredicate(expression);

My debugging output *looks* like I am creating it properly:
predicate: language[simple:${body} contains 'test']

But when I try to use this when processing an Exchange, I am getting a null
pointer exception:
java.lang.NullPointerException: null
at
org.apache.camel.support.builder.ExpressionBuilder$22.matches(ExpressionBuilder.java:784)
~[camel-support-3.15.0-SNAPSHOT.jar:3.15.0-SNAPSHOT]

Can anyone give me an idea about what I might be missing?

Thanks,
Steve