org.springframework.context.expression

Class MethodBasedEvaluationContext

java.lang.Object

org.springframework.expression.spel.support.StandardEvaluationContext

org.springframework.context.expression.MethodBasedEvaluationContext

All Implemented Interfaces:

EvaluationContext

Direct Known Subclasses:

CacheEvaluationContext

public class MethodBasedEvaluationContext
extends StandardEvaluationContext

A method-based EvaluationContext that provides explicit support for method-based invocations.

Expose the actual method arguments using the following aliases:

1. pX where X is the index of the argument (p0 for the first argument)
2. aX where X is the index of the argument (a1 for the second argument)
3. the name of the parameter as discovered by a configurable ParameterNameDiscoverer

Since:

4.2.0

Author:

Stephane Nicoll

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.Object[]	args
private java.lang.reflect.Method	method
private ParameterNameDiscoverer	paramDiscoverer
private boolean	paramLoaded

Constructor Summary

Constructors

Constructor and Description
MethodBasedEvaluationContext(java.lang.Object rootObject, java.lang.reflect.Method method, java.lang.Object[] args, ParameterNameDiscoverer paramDiscoverer)

Method Summary

Modifier and Type	Method and Description
protected void	lazyLoadArguments() Load the param information only when needed.
java.lang.Object	lookupVariable(java.lang.String name) Look up a named variable within this evaluation context.

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

addConstructorResolver, addMethodResolver, addPropertyAccessor, getBeanResolver, getConstructorResolvers, getMethodResolvers, getOperatorOverloader, getPropertyAccessors, getRootObject, getTypeComparator, getTypeConverter, getTypeLocator, registerFunction, registerMethodFilter, removeConstructorResolver, removeMethodResolver, removePropertyAccessor, setBeanResolver, setConstructorResolvers, setMethodResolvers, setOperatorOverloader, setPropertyAccessors, setRootObject, setRootObject, setTypeComparator, setTypeConverter, setTypeLocator, setVariable, setVariables

Methods inherited from class java.lang.Object

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

Field Detail

method

private final java.lang.reflect.Method method

args

private final java.lang.Object[] args

paramDiscoverer

private final ParameterNameDiscoverer paramDiscoverer

paramLoaded

private boolean paramLoaded

Constructor Detail

MethodBasedEvaluationContext

public MethodBasedEvaluationContext(java.lang.Object rootObject,
                                    java.lang.reflect.Method method,
                                    java.lang.Object[] args,
                                    ParameterNameDiscoverer paramDiscoverer)

Method Detail

lookupVariable

public java.lang.Object lookupVariable(java.lang.String name)

Description copied from interface: EvaluationContext

Look up a named variable within this evaluation context.

Specified by:

lookupVariable in interface EvaluationContext

Overrides:

lookupVariable in class StandardEvaluationContext

Parameters:

name - variable to lookup

Returns:

the value of the variable

lazyLoadArguments

protected void lazyLoadArguments()

Load the param information only when needed.