org.springframework.cache.interceptor
Class LazyParamAwareEvaluationContext

java.lang.Object
  org.springframework.expression.spel.support.StandardEvaluationContext
      org.springframework.cache.interceptor.LazyParamAwareEvaluationContext

All Implemented Interfaces:

EvaluationContext

 class LazyParamAwareEvaluationContext
extends StandardEvaluationContext

Evaluation context class that adds a method parameters as SpEL variables, in a lazy manner. The lazy nature eliminates unneeded parsing of classes byte code for parameter discovery.

To limit the creation of objects, an ugly constructor is used (rather then a dedicated 'closure'-like class for deferred execution).

Since:

3.1

Author:

Costin Leau

Field Summary

private java.lang.Object[]	args
private java.lang.reflect.Method	method
private java.util.Map<java.lang.reflect.Method,java.lang.reflect.Method>	methodCache
private ParameterNameDiscoverer	paramDiscoverer
private boolean	paramLoaded
private java.lang.Class<?>	targetClass

Constructor Summary

LazyParamAwareEvaluationContext(java.lang.Object rootObject, ParameterNameDiscoverer paramDiscoverer, java.lang.reflect.Method method, java.lang.Object[] args, java.lang.Class<?> targetClass, java.util.Map<java.lang.reflect.Method,java.lang.reflect.Method> methodCache)

Method Summary

private void	loadArgsAsVariables()
java.lang.Object	lookupVariable(java.lang.String name) Load the param information only when needed.

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

paramDiscoverer

private final ParameterNameDiscoverer paramDiscoverer

method

private final java.lang.reflect.Method method

args

private final java.lang.Object[] args

targetClass

private final java.lang.Class<?> targetClass

methodCache

private final java.util.Map<java.lang.reflect.Method,java.lang.reflect.Method> methodCache

paramLoaded

private boolean paramLoaded

Constructor Detail

LazyParamAwareEvaluationContext

LazyParamAwareEvaluationContext(java.lang.Object rootObject,
                                ParameterNameDiscoverer paramDiscoverer,
                                java.lang.reflect.Method method,
                                java.lang.Object[] args,
                                java.lang.Class<?> targetClass,
                                java.util.Map<java.lang.reflect.Method,java.lang.reflect.Method> methodCache)

Method Detail

lookupVariable

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

Load the param information only when needed.

Specified by:

lookupVariable in interface EvaluationContext

Overrides:

lookupVariable in class StandardEvaluationContext

Parameters:

name - variable to lookup

Returns:

the value of the variable

loadArgsAsVariables

private void loadArgsAsVariables()