com.goldencode.p2j.util

Class MethodInvoker

java.lang.Object

com.goldencode.p2j.util.MethodInvoker

All Implemented Interfaces:

Invocable

public class MethodInvoker
extends java.lang.Object
implements Invocable

Helper class to delegate execution of Method.invoke.

Field Summary

Fields

Modifier and Type	Field and Description
private com.esotericsoftware.reflectasm.MethodAccess	access The ReflectASM access point to this method.
private int	index The method index in the MethodAccess instance.
private java.lang.Object	instance Reference to instance of class which will handle calls.
private java.lang.reflect.Method	method The method to be executed.
private static boolean	useReflectAsm Flag indicating if ReflectASM is available.

Constructor Summary

Constructors

Constructor and Description
MethodInvoker(java.lang.Object instance, java.lang.reflect.Method method) Construct an instance that can make an invocation of a specific local method.

Method Summary

Modifier and Type	Method and Description
java.lang.String	describe() Return a text description of the method being invoked.
java.lang.Object	invoke(java.lang.Object[] args) Execute or "run" the object's functionality.

Methods inherited from class java.lang.Object

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

Field Detail

useReflectAsm

private static boolean useReflectAsm

Flag indicating if ReflectASM is available.

instance

private java.lang.Object instance

Reference to instance of class which will handle calls.

method

private java.lang.reflect.Method method

The method to be executed.

access

private com.esotericsoftware.reflectasm.MethodAccess access

The ReflectASM access point to this method.

index

private int index

The method index in the MethodAccess instance.

Constructor Detail

MethodInvoker

public MethodInvoker(java.lang.Object instance,
                     java.lang.reflect.Method method)

Construct an instance that can make an invocation of a specific local method.

Parameters:

instance - The object on which the method is invoked or null if this method is static.

method - The method to be executed.

Method Detail

describe

public java.lang.String describe()

Return a text description of the method being invoked.

Specified by:

describe in interface Invocable

Returns:

The description.

invoke

public java.lang.Object invoke(java.lang.Object[] args)
                        throws java.lang.Throwable

Execute or "run" the object's functionality.

Specified by:

invoke in interface Invocable

Parameters:

args - The method arguments or null for no arguments.

Returns:

The called method's return value or null if there is no return value. Note that this design does not allow the caller to determine the difference between a void return and a return of a genuine null.

Throws:

java.lang.Throwable - If the called method generates any exception or error.