org.springframework.expression.spel.support

Class DataBindingMethodResolver

java.lang.Object

org.springframework.expression.spel.support.ReflectiveMethodResolver

org.springframework.expression.spel.support.DataBindingMethodResolver

All Implemented Interfaces:

MethodResolver

public class DataBindingMethodResolver
extends ReflectiveMethodResolver

A MethodResolver variant for data binding purposes, using reflection to access instance methods on a given target object.

This accessor does not resolve static methods and also no technical methods on java.lang.Object or java.lang.Class. For unrestricted resolution, choose ReflectiveMethodResolver instead.

Since:

4.3.15

Author:

Juergen Hoeller

See Also:

forInstanceMethodInvocation(), DataBindingPropertyAccessor

Method Summary

Modifier and Type	Method and Description
static DataBindingMethodResolver	forInstanceMethodInvocation() Create a new data-binding method resolver for instance method resolution.
protected boolean	isCandidateForInvocation(Method method, Class<?> targetClass) Determine whether the given Method is a candidate for method resolution on an instance of the given target class.
MethodExecutor	resolve(EvaluationContext context, Object targetObject, String name, List<TypeDescriptor> argumentTypes) Locate a method on a type.

Methods inherited from class org.springframework.expression.spel.support.ReflectiveMethodResolver

getMethods, registerMethodFilter

Methods inherited from class java.lang.Object

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

Method Detail

resolve

public MethodExecutor resolve(EvaluationContext context,
                              Object targetObject,
                              String name,
                              List<TypeDescriptor> argumentTypes)
                       throws AccessException

Description copied from class: ReflectiveMethodResolver

Locate a method on a type. There are three kinds of match that might occur:

1. an exact match where the types of the arguments match the types of the constructor
2. an in-exact match where the types we are looking for are subtypes of those defined on the constructor
3. a match where we are able to convert the arguments into those expected by the constructor, according to the registered type converter

Specified by:

resolve in interface MethodResolver

Overrides:

resolve in class ReflectiveMethodResolver

Parameters:

context - the current evaluation context

targetObject - the object upon which the method is being called

argumentTypes - the arguments that the constructor must be able to handle

Returns:

a MethodExecutor that can invoke the method, or null if the method cannot be found

Throws:

AccessException

isCandidateForInvocation

protected boolean isCandidateForInvocation(Method method,
                                           Class<?> targetClass)

Description copied from class: ReflectiveMethodResolver

Determine whether the given Method is a candidate for method resolution on an instance of the given target class.

The default implementation considers any method as a candidate, even for static methods sand non-user-declared methods on the Object base class.

Overrides:

isCandidateForInvocation in class ReflectiveMethodResolver

Parameters:

method - the Method to evaluate

targetClass - the concrete target class that is being introspected

forInstanceMethodInvocation

public static DataBindingMethodResolver forInstanceMethodInvocation()

Create a new data-binding method resolver for instance method resolution.