org.springframework.context.expression

## 类 MethodBasedEvaluationContext

- java.lang.Object
- - org.springframework.expression.spel.support.StandardEvaluationContext
  - - org.springframework.context.expression.MethodBasedEvaluationContext

- 所有已实现的接口:
    org.springframework.expression.EvaluationContext

      public class MethodBasedEvaluationContext
      extends org.springframework.expression.spel.support.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`
  从以下版本开始:
    4.2
  作者:
    Stephane Nicoll, Juergen Hoeller

- - ### 构造器概要

    构造器
    构造器和说明
    `MethodBasedEvaluationContext(Object rootObject, Method method, Object[] arguments, org.springframework.core.ParameterNameDiscoverer parameterNameDiscoverer)`

  - ### 方法概要

    所有方法 实例方法 具体方法
    限定符和类型 | 方法和说明
    --- | ---
    `protected void` | `lazyLoadArguments()` Load the param information only when needed.
    `Object` | `lookupVariable(String name)`

    - ### 从类继承的方法 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`

    - ### 从类继承的方法 java.lang.Object

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

- - ### 构造器详细资料

    - #### MethodBasedEvaluationContext

          public MethodBasedEvaluationContext(Object rootObject,
                                              Method method,
                                              Object[] arguments,
                                              org.springframework.core.ParameterNameDiscoverer parameterNameDiscoverer)

  - ### 方法详细资料

    - #### lookupVariable

          @Nullable
          public Object lookupVariable(String name)

      指定者:
        `lookupVariable` 在接口中 `org.springframework.expression.EvaluationContext`
      覆盖:
        `lookupVariable` 在类中 `org.springframework.expression.spel.support.StandardEvaluationContext`

    - #### lazyLoadArguments

          protected void lazyLoadArguments()

      Load the param information only when needed.