程序包 cn.taketoday.context.expression

类 EnvironmentAccessor

java.lang.Object

cn.taketoday.context.expression.EnvironmentAccessor

所有已实现的接口:

cn.taketoday.expression.PropertyAccessor

public class EnvironmentAccessor
extends Object
implements cn.taketoday.expression.PropertyAccessor

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

从以下版本开始:

4.0

作者:

Chris Beams

构造器概要

构造器

构造器	说明
EnvironmentAccessor()

方法概要

修饰符和类型	方法	说明
boolean	canRead(cn.taketoday.expression.EvaluationContext context, Object target, String name)	Can read any Environment, thus always returns true.
boolean	canWrite(cn.taketoday.expression.EvaluationContext context, Object target, String name)	Read-only: returns false.
Class<?>[]	getSpecificTargetClasses()
cn.taketoday.expression.TypedValue	read(cn.taketoday.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(cn.taketoday.expression.EvaluationContext context, Object target, String name, Object newValue)	Read-only: no-op.

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

EnvironmentAccessor

public EnvironmentAccessor()

方法详细资料

getSpecificTargetClasses

public Class<?>[] getSpecificTargetClasses()

指定者:

getSpecificTargetClasses 在接口中 cn.taketoday.expression.PropertyAccessor

canRead

public boolean canRead(cn.taketoday.expression.EvaluationContext context,
 @Nullable
 Object target,
 String name)
                throws cn.taketoday.expression.AccessException

Can read any Environment, thus always returns true.

指定者:

canRead 在接口中 cn.taketoday.expression.PropertyAccessor

返回:

true

抛出:

cn.taketoday.expression.AccessException

read

public cn.taketoday.expression.TypedValue read(cn.taketoday.expression.EvaluationContext context,
 @Nullable
 Object target,
 String name)
                                        throws cn.taketoday.expression.AccessException

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

指定者:

read 在接口中 cn.taketoday.expression.PropertyAccessor

抛出:

cn.taketoday.expression.AccessException

canWrite

public boolean canWrite(cn.taketoday.expression.EvaluationContext context,
 @Nullable
 Object target,
 String name)
                 throws cn.taketoday.expression.AccessException

Read-only: returns false.

指定者:

canWrite 在接口中 cn.taketoday.expression.PropertyAccessor

抛出:

cn.taketoday.expression.AccessException

write

public void write(cn.taketoday.expression.EvaluationContext context,
 @Nullable
 Object target,
 String name,
 @Nullable
 Object newValue)
           throws cn.taketoday.expression.AccessException

Read-only: no-op.

指定者:

write 在接口中 cn.taketoday.expression.PropertyAccessor

抛出:

cn.taketoday.expression.AccessException