Examples of org.mule.expression.transformers.ExpressionTransformer

org.mule.expression.transformers.ExpressionTransformer

This transformer will evaluate one or more expressions on the current message and return the results as an Array. If only one expression is defined it will return the object returned from the expression.

You can use expressions to extract

headers (single, map or list)
attachments (single, map or list)
payload
xpath
groovy
bean

and more.

This transformer provides a very powerful way to pull different bits of information from the message and pass them to the service.

{
    protected static Log logger = LogFactory.getLog(ExpressionAnnotationsHelper.class);


    public static ExpressionTransformer getTransformerForMethodWithAnnotations(Method method, MuleContext context) throws TransformerException, InitialisationException
    {
        ExpressionTransformer trans = new ExpressionTransformer();
        trans.setMuleContext(context);


        Annotation[][] annotations = method.getParameterAnnotations();


        for (int i = 0; i < annotations.length; i++)
        {
            Annotation[] annotation = annotations[i];
            for (int j = 0; j < annotation.length; j++)
            {
                Annotation ann = annotation[j];
                ExpressionArgument arg = parseAnnotation(ann, method.getParameterTypes()[i], context);


                if (arg != null)
                {
                    trans.addArgument(arg);
                }
            }
        }
        trans.initialise();
        return trans;
    }

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Examples of org.mule.expression.transformers.ExpressionTransformer

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