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 final 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(java.lang.reflect.Method method, java.lang.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, java.lang.Object targetObject, java.lang.String name, java.util.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

@Nullable
public MethodExecutor resolve(EvaluationContext context,
                                        java.lang.Object targetObject,
                                        java.lang.String name,
                                        java.util.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(java.lang.reflect.Method method,
                                           java.lang.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.