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org.springframework.context.expression
Class MethodBasedEvaluationContext
- java.lang.Object
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- org.springframework.expression.spel.support.StandardEvaluationContext
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- org.springframework.context.expression.MethodBasedEvaluationContext
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- All Implemented Interfaces:
- EvaluationContext
public class MethodBasedEvaluationContext extends StandardEvaluationContext
A method-basedEvaluationContextthat provides explicit support for method-based invocations.Expose the actual method arguments using the following aliases:
- pX where X is the index of the argument (p0 for the first argument)
- aX where X is the index of the argument (a1 for the second argument)
- the name of the parameter as discovered by a configurable
ParameterNameDiscoverer
- Since:
- 4.2
- Author:
- Stephane Nicoll, Juergen Hoeller
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Constructor Summary
Constructors Constructor and Description MethodBasedEvaluationContext(java.lang.Object rootObject, java.lang.reflect.Method method, java.lang.Object[] arguments, ParameterNameDiscoverer parameterNameDiscoverer)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method and Description protected voidlazyLoadArguments()Load the param information only when needed.java.lang.ObjectlookupVariable(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
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Constructor Detail
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MethodBasedEvaluationContext
public MethodBasedEvaluationContext(java.lang.Object rootObject, java.lang.reflect.Method method, java.lang.Object[] arguments, ParameterNameDiscoverer parameterNameDiscoverer)
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Method Detail
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lookupVariable
@Nullable public java.lang.Object lookupVariable(java.lang.String name)
Description copied from interface:EvaluationContextLook up a named variable within this evaluation context.- Specified by:
lookupVariablein interfaceEvaluationContext- Overrides:
lookupVariablein classStandardEvaluationContext- Parameters:
name- variable to lookup- Returns:
- the value of the variable, or
nullif not found
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lazyLoadArguments
protected void lazyLoadArguments()
Load the param information only when needed.
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