org.fest.reflect.field

Class DecoratedInvoker<T>

java.lang.Object

org.fest.reflect.field.DecoratedInvoker<T>

public final class DecoratedInvoker<T>
extends java.lang.Object

A decorated invoker allowing to ignore some exceptions or returning decorator result instead of field result.

Author:

Ivan Hristov

Method Summary

Methods

Modifier and Type	Method and Description
DecoratedInvoker<T>	ignoringDecoratorExceptions() Ignores any RuntimeException which comes from the preceding decorator.
DecoratedInvoker<T>	ignoringDecoratorExceptionsOfType(java.lang.Class<?> exceptionClass) Ignores any exception of the exceptionClass type which comes from the preceding decorator.
DecoratedInvoker<T>	postDecorateWith(T decorator) Adds a post-decorator to an already decorated field
DecoratedInvoker<T>	preDecorateWith(T decorator) Adds a pre-decorator to an already decorated field.
DecoratedInvoker<T>	returningDecoratorResult() Specifies that the result from the decorator should be returned.

Methods inherited from class java.lang.Object

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

Method Detail

ignoringDecoratorExceptions

public DecoratedInvoker<T> ignoringDecoratorExceptions()

Ignores any RuntimeException which comes from the preceding decorator.

Returns:

the DecoratedResultInvoker ignoring exceptions.

ignoringDecoratorExceptionsOfType

public DecoratedInvoker<T> ignoringDecoratorExceptionsOfType(java.lang.Class<?> exceptionClass)

Ignores any exception of the exceptionClass type which comes from the preceding decorator.

Parameters:

exceptionClass - the exception to ignore - usually a checked exception of decorator method

Returns:

the DecoratedResultInvoker ignoring given exception type.

returningDecoratorResult

public DecoratedInvoker<T> returningDecoratorResult()

Specifies that the result from the decorator should be returned.

If ignoringDecoratorExceptions() is used in combination with this method and an exception is thrown, the default value will be returned (as defined by JLS) for all primitives or null for all non-primitive.

Example :
If a RuntimeException is thrown while executing one of the decorated IExampleService field methods which returns primitive boolean value, the default value false will be returned.

 field("fieldName").ofType(IExampleService.class).in(target)
                   .postDecorateWith(postDecoratorService)
                   .returningDecoratorResult()
                   .ignoringDecoratorExceptions();
 

In case of several decorators attached to a field, the result from the latest will be returned.

Example 1:
The result from the preDecoratorService will be returned

 field("fieldName").ofType(IExampleService.class).in(target)
                   .preDecorateWith(preDecoratorService)
                   .returningDecoratorResult();
 

Example 2:
The result from the postDecoratorService will be returned

 field("fieldName").ofType(IExampleService.class).in(target)
                   .postDecorateWith(postDecoratorService)
                   .returningDecoratorResult();
 

Example 3:
The result from the preDecoratorService will be returned, since it's the latest attached decorator.

 field("fieldName").ofType(IExampleService.class).in(target)
                   .postDecorateWith(postDecoratorService)
                   .returningDecoratorResult()
                   .preDecorateWith(preDecoratorService)
                   .returningDecoratorResult();
 

preDecorateWith

public DecoratedInvoker<T> preDecorateWith(T decorator)

Adds a pre-decorator to an already decorated field.

Note that if there are more than one pre-decorators assigned to a field they will be executed starting from the last attached decorator.

Parameters:

decorator - which methods be called before the same targeted object methods

Returns:

the DecoratedInvoker pre decorating the target field interface with given decorator.

postDecorateWith

public DecoratedInvoker<T> postDecorateWith(T decorator)

Adds a post-decorator to an already decorated field

Note that if there are more than one post-decorators assigned to a field they will be executed starting from the first attached decorator.

Parameters:

decorator - which methods be called after the same targeted object methods

Returns:

the DecoratedInvoker post decorating the target field interface with given decorator.