Package org.apache.hadoop.util.dynamic

Class DynMethods.UnboundMethod

java.lang.Object

org.apache.hadoop.util.dynamic.DynMethods.UnboundMethod

Direct Known Subclasses:

DynConstructors.Ctor

Enclosing class:

DynMethods

public static class DynMethods.UnboundMethod
extends Object

Convenience wrapper class around Method.

Allows callers to invoke the wrapped method with all Exceptions wrapped by RuntimeException, or with a single Exception catch block.

Method Summary

Modifier and Type	Method	Description
DynMethods.StaticMethod	asStatic()	Returns this method as a StaticMethod.
DynMethods.BoundMethod	bind(Object receiver)	Returns this method as a BoundMethod for the given receiver.
<R> R	invoke(Object target, Object... args)
<R> R	invokeChecked(Object target, Object... args)
<R> R	invokeStatic(Object... args)	Invoke a static method.
boolean	isNoop()
boolean	isStatic()
String	toString()

Methods inherited from class java.lang.Object

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

Method Details

invokeChecked

public <R> R invokeChecked(Object target,
 Object... args)
                    throws Exception

Throws:

Exception

invoke

public <R> R invoke(Object target,
 Object... args)

invokeStatic

public <R> R invokeStatic(Object... args)

Invoke a static method.

Type Parameters:

R - type of result.

Parameters:

args - arguments.

Returns:

result.

bind

public DynMethods.BoundMethod bind(Object receiver)

Returns this method as a BoundMethod for the given receiver.

Parameters:

receiver - an Object to receive the method invocation

Returns:

a DynMethods.BoundMethod for this method and the receiver

Throws:

IllegalStateException - if the method is static

IllegalArgumentException - if the receiver's class is incompatible

isStatic

public boolean isStatic()

Returns:

whether the method is a static method

isNoop

public boolean isNoop()

Returns:

whether the method is a noop

asStatic

public DynMethods.StaticMethod asStatic()

Returns this method as a StaticMethod.

Returns:

a DynMethods.StaticMethod for this method

Throws:

IllegalStateException - if the method is not static

toString

public String toString()

Overrides:

toString in class Object