org.springframework.context.expression

Class EnvironmentAccessor

java.lang.Object

org.springframework.context.expression.EnvironmentAccessor

All Implemented Interfaces:

org.springframework.expression.PropertyAccessor

public class EnvironmentAccessor
extends Object
implements org.springframework.expression.PropertyAccessor

Read-only EL property accessor that knows how to retrieve keys of a Spring Environment instance.

Since:

3.1

Author:

Chris Beams

Constructor Summary

Constructors

Constructor and Description
EnvironmentAccessor()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canRead(org.springframework.expression.EvaluationContext context, Object target, String name) Can read any Environment, thus always returns true.
boolean	canWrite(org.springframework.expression.EvaluationContext context, Object target, String name) Read-only: returns false.
Class<?>[]	getSpecificTargetClasses()
org.springframework.expression.TypedValue	read(org.springframework.expression.EvaluationContext context, Object target, String name) Access the given target object by resolving the given property name against the given target environment.
void	write(org.springframework.expression.EvaluationContext context, Object target, String name, Object newValue) Read-only: no-op.

Methods inherited from class java.lang.Object

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

Constructor Detail

EnvironmentAccessor

public EnvironmentAccessor()

Method Detail

getSpecificTargetClasses

public Class<?>[] getSpecificTargetClasses()

Specified by:

getSpecificTargetClasses in interface org.springframework.expression.PropertyAccessor

canRead

public boolean canRead(org.springframework.expression.EvaluationContext context,
              Object target,
              String name)
                throws org.springframework.expression.AccessException

Can read any Environment, thus always returns true.

Specified by:

canRead in interface org.springframework.expression.PropertyAccessor

Returns:

true

Throws:

org.springframework.expression.AccessException

read

public org.springframework.expression.TypedValue read(org.springframework.expression.EvaluationContext context,
                                             Object target,
                                             String name)
                                               throws org.springframework.expression.AccessException

Access the given target object by resolving the given property name against the given target environment.

Specified by:

read in interface org.springframework.expression.PropertyAccessor

Throws:

org.springframework.expression.AccessException

canWrite

public boolean canWrite(org.springframework.expression.EvaluationContext context,
               Object target,
               String name)
                 throws org.springframework.expression.AccessException

Read-only: returns false.

Specified by:

canWrite in interface org.springframework.expression.PropertyAccessor

Throws:

org.springframework.expression.AccessException

write

public void write(org.springframework.expression.EvaluationContext context,
         Object target,
         String name,
         Object newValue)
           throws org.springframework.expression.AccessException

Read-only: no-op.

Specified by:

write in interface org.springframework.expression.PropertyAccessor

Throws:

org.springframework.expression.AccessException