类 EnvironmentAccessor

构造器详细资料

• EnvironmentAccessor

  public EnvironmentAccessor()

方法详细资料

• getSpecificTargetClasses

  public Class<?>[] getSpecificTargetClasses()

  从接口复制的说明: PropertyAccessor
  Return an array of classes for which this resolver should be called.

  Returning null indicates this is a general resolver that can be called in an attempt to resolve a property on any type.

  指定者:

  getSpecificTargetClasses 在接口中 PropertyAccessor

  返回:

  an array of classes that this resolver is suitable for (or null if a general resolver)

• canRead

  public boolean canRead​(EvaluationContext context,
                         @Nullable
                         Object target,
                         String name)
                  throws AccessException

  Can read any Environment, thus always returns true.

  指定者:

  canRead 在接口中 PropertyAccessor

  参数:

  context - the evaluation context in which the access is being attempted

  target - the target object upon which the property is being accessed

  name - the name of the property being accessed

  返回:

  true

  抛出:

  AccessException - if there is any problem determining whether the property can be read

• read

  public TypedValue read​(EvaluationContext context,
                         @Nullable
                         Object target,
                         String name)
                  throws 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 PropertyAccessor

  参数:

  context - the evaluation context in which the access is being attempted

  target - the target object upon which the property is being accessed

  name - the name of the property being accessed

  返回:

  a TypedValue object wrapping the property value read and a type descriptor for it

  抛出:

  AccessException - if there is any problem accessing the property value

• canWrite

  public boolean canWrite​(EvaluationContext context,
                          @Nullable
                          Object target,
                          String name)
                   throws AccessException

  Read-only: returns false.

  指定者:

  canWrite 在接口中 PropertyAccessor

  参数:

  context - the evaluation context in which the access is being attempted

  target - the target object upon which the property is being accessed

  name - the name of the property being accessed

  返回:

  true if this resolver is able to write to the property

  抛出:

  AccessException - if there is any problem determining whether the property can be written to

• write

  public void write​(EvaluationContext context,
                    @Nullable
                    Object target,
                    String name,
                    @Nullable
                    Object newValue)
             throws AccessException

  Read-only: no-op.

  指定者:

  write 在接口中 PropertyAccessor

  参数:

  context - the evaluation context in which the access is being attempted

  target - the target object upon which the property is being accessed

  name - the name of the property being accessed

  newValue - the new value for the property

  抛出:

  AccessException - if there is any problem writing to the property value