org.springframework.expression.spel.support

Class ReflectiveMethodExecutor

java.lang.Object

org.springframework.expression.spel.support.ReflectiveMethodExecutor

All Implemented Interfaces:

MethodExecutor

public class ReflectiveMethodExecutor
extends Object
implements MethodExecutor

MethodExecutor that works via reflection.

Since:

3.0

Author:

Andy Clement, Juergen Hoeller

Constructor Summary

Constructors

Constructor and Description
ReflectiveMethodExecutor(Method method) Create a new executor for the given method.
ReflectiveMethodExecutor(Method method, Class<?> targetClass) Create a new executor for the given method.

Method Summary

Modifier and Type	Method and Description
boolean	didArgumentConversionOccur()
TypedValue	execute(EvaluationContext context, Object target, Object... arguments) Execute a command using the specified arguments, and using the specified expression state.
Method	getMethod() Return the original method that this executor has been configured for.
Class<?>	getPublicDeclaringClass() Find the first public class in the methods declaring class hierarchy that declares this method.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReflectiveMethodExecutor

public ReflectiveMethodExecutor(Method method)

Create a new executor for the given method.

Parameters:

method - the method to invoke

ReflectiveMethodExecutor

public ReflectiveMethodExecutor(Method method,
                                @Nullable
                                Class<?> targetClass)

Create a new executor for the given method.

Parameters:

method - the method to invoke

targetClass - the target class to invoke the method on

Since:

5.3.16

Method Detail

getMethod

public final Method getMethod()

Return the original method that this executor has been configured for.

getPublicDeclaringClass

@Nullable
public Class<?> getPublicDeclaringClass()

Find the first public class in the methods declaring class hierarchy that declares this method. Sometimes the reflective method discovery logic finds a suitable method that can easily be called via reflection but cannot be called from generated code when compiling the expression because of visibility restrictions. For example if a non-public class overrides toString(), this helper method will walk up the type hierarchy to find the first public type that declares the method (if there is one!). For toString() it may walk as far as Object.

didArgumentConversionOccur

public boolean didArgumentConversionOccur()

execute

public TypedValue execute(EvaluationContext context,
                          Object target,
                          Object... arguments)
                   throws AccessException

Description copied from interface: MethodExecutor

Execute a command using the specified arguments, and using the specified expression state.

Specified by:

execute in interface MethodExecutor

Parameters:

context - the evaluation context in which the command is being executed

target - the target object of the call - null for static methods

arguments - the arguments to the executor, should match (in terms of number and type) whatever the command will need to run

Returns:

the value returned from execution

Throws:

AccessException - if there is a problem executing the command or the MethodExecutor is no longer valid