net.sf.staccatocommons.dynamic.internal
Class NullDynamic

java.lang.Object
  net.sf.staccatocommons.dynamic.AbstractDynamic
      net.sf.staccatocommons.dynamic.internal.NullDynamic

All Implemented Interfaces:

net.sf.staccatocommons.defs.Thunk<Object>, Dynamic

public class NullDynamic
extends AbstractDynamic

Author:

flbulgarelli

Field Summary

Fields inherited from class net.sf.staccatocommons.dynamic.AbstractDynamic

NULL_INVOKER, PROXY_FACTORY

Constructor Summary

NullDynamic()

Method Summary

Dynamic	chainingSend(String selector, Object... args) Sends a message to this Dynamic, as defined by Dynamic.send(String, Object...), and returns the message result wrapped as a dynamic, or Dynamics.null_(), if the result was null.
protected org.apache.commons.proxy.Invoker	getInvoker()
<T> T	send(String selector, Object... args) Sends a message to this Dynamic, and returns the message result If there is no method matching for the given selector and argument count and types, the message is said to not being understood and a MessageNotUnderstoodException is thrown If there exists more than one method matching the given selector and arguments count and types, Dynamic makes no assumptions about which one will be evaluated.
Object	value() The wrapped value
protected boolean	valueIsInstanceOf(Class<?> clazz)

Methods inherited from class net.sf.staccatocommons.dynamic.AbstractDynamic

$, as, chainingAs, delayedSend

Methods inherited from class java.lang.Object

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

Constructor Detail

NullDynamic

public NullDynamic()

Method Detail

send

public <T> T send(String selector,
                  Object... args)

Description copied from interface: Dynamic

Sends a message to this Dynamic, and returns the message result If there is no method matching for the given selector and argument count and types, the message is said to not being understood and a MessageNotUnderstoodException is thrown If there exists more than one method matching the given selector and arguments count and types, Dynamic makes no assumptions about which one will be evaluated.

Parameters:

selector - the message name

args - the message arguments

Returns:

the message result

chainingSend

public Dynamic chainingSend(String selector,
                            Object... args)

Description copied from interface: Dynamic

Sends a message to this Dynamic, as defined by Dynamic.send(String, Object...), and returns the message result wrapped as a dynamic, or Dynamics.null_(), if the result was null. If the message is not understood, instead of throwing an exception, this method returns the null dynamic. This method makes chaining dynamic methods easier. Example:

 Dynamics.from(anObject).$("getFoo").$("getBar").$("getBaz").value()
 

This will return the messages chain result, or null, if any message of the chain returned null or was not understood

Returns:

the null dynamic if the message was not understood or if answered null. The message result, wrapped as a Dynamic, otherwise.

See Also:

Dynamics.null_()

value

public Object value()

Description copied from interface: Dynamic

The wrapped value

valueIsInstanceOf

protected boolean valueIsInstanceOf(Class<?> clazz)

Overrides:

valueIsInstanceOf in class AbstractDynamic

getInvoker

protected org.apache.commons.proxy.Invoker getInvoker()

Overrides:

getInvoker in class AbstractDynamic