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:

org.mule.runtime.api.lifecycle.Initialisable, ValueResolver<T>

public class TypeSafeExpressionValueResolver<T>
extends Object
implements ValueResolver<T>, org.mule.runtime.api.lifecycle.Initialisable

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

If the 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

Field Summary

Fields inherited from interface org.mule.runtime.api.lifecycle.Initialisable

PHASE_NAME

Constructor Summary

Constructors

Constructor and Description
TypeSafeExpressionValueResolver(String expression, Class<T> expectedType, org.mule.runtime.api.metadata.DataType expectedDataType)

Method Summary

Modifier and Type	Method and Description
void	initialise()
boolean	isDynamic() Returns false if subsequent invocations to ValueResolver.resolve(ValueResolvingContext) will return the same value.
T	resolve(ValueResolvingContext context) Resolves a value from the given event
void	setExtendedExpressionManager(ExtendedExpressionManager extendedExpressionManager)
void	setMelAvailable(Boolean melAvailable)
void	setMelDefault(Boolean melDefault)
void	setMuleContext(MuleContext muleContext)
void	setTransformationService(org.mule.runtime.api.transformation.TransformationService transformationService)

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,
                                       org.mule.runtime.api.metadata.DataType expectedDataType)

Method Detail

resolve

public T resolve(ValueResolvingContext context)
          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:

context - the context for the current resolution attempt

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(ValueResolvingContext) 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

initialise

public void initialise()
                throws org.mule.runtime.api.lifecycle.InitialisationException

Specified by:

initialise in interface org.mule.runtime.api.lifecycle.Initialisable

Throws:

org.mule.runtime.api.lifecycle.InitialisationException

setTransformationService

public void setTransformationService(org.mule.runtime.api.transformation.TransformationService transformationService)

setExtendedExpressionManager

public void setExtendedExpressionManager(ExtendedExpressionManager extendedExpressionManager)

setMuleContext

public void setMuleContext(MuleContext muleContext)

setMelDefault

public void setMelDefault(Boolean melDefault)

setMelAvailable

public void setMelAvailable(Boolean melAvailable)