org.mule.runtime.module.extension.internal.runtime.resolver

Class TypeSafeExpressionValueResolver<T>

java.lang.Object

org.mule.runtime.module.extension.internal.runtime.resolver.TypeSafeExpressionValueResolver<T>

Type Parameters:

T -

All Implemented Interfaces:

ValueResolver<T>

public class TypeSafeExpressionValueResolver<T>
extends Object
implements ValueResolver<T>

A ValueResolver which evaluates a MEL expressions and tries to ensure that the output is always of a certain type.

If the MEL expression does not return a value of that type, then it tries to locate a Transformer which can do the transformation from the obtained type to the expected one.

It resolves the expressions by making use of the AttributeEvaluator so that it's compatible with simple expressions and templates alike

Since:

3.7.0

Constructor Summary

Constructors

Constructor and Description
TypeSafeExpressionValueResolver(String expression, Class<T> expectedType, MuleContext muleContext)

Method Summary

Modifier and Type	Method and Description
boolean	isDynamic() returns false if subsequent invocations to ValueResolver.resolve(Event) will return the same value.
T	resolve(Event event) Resolves a value from the given event

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TypeSafeExpressionValueResolver

public TypeSafeExpressionValueResolver(String expression,
                                       Class<T> expectedType,
                                       MuleContext muleContext)

Method Detail

resolve

public T resolve(Event event)
          throws org.mule.runtime.api.exception.MuleException

Description copied from interface: ValueResolver

Resolves a value from the given event

Specified by:

resolve in interface ValueResolver<T>

Parameters:

event - a Event

Returns:

a resolved value

Throws:

org.mule.runtime.api.exception.MuleException - if the resolution of the value fails

isDynamic

public boolean isDynamic()

Description copied from interface: ValueResolver

returns false if subsequent invocations to ValueResolver.resolve(Event) will return the same value. Notice that if it returns true, then it might return different values per invocation but that's not guaranteed.

Specified by:

isDynamic in interface ValueResolver<T>

Returns:

true