com.generationjava.lang
Class ClassW

java.lang.Object
  com.generationjava.lang.ClassW

public final class ClassW
extends java.lang.Object

A set of static utilities for use with Classes.

Author:

bayard@generationjava.com

Constructor Summary

ClassW()

Method Summary

static void	callMain(java.lang.String[] args)
static void	callMain(java.lang.String classname, java.lang.String[] args)
static void	callStatic(java.lang.String classname, java.lang.String methodName, java.lang.Class[] types, java.lang.Object[] args) Runs a static method on a class.
static boolean	classExists(java.lang.String classname) Is this Class in the CLASSPATH
static boolean	classExtends(java.lang.Class clss, java.lang.String exts) Does this Class extend a superclass with this name.
static boolean	classImplements(java.lang.Class clss, java.lang.String exts) Does this Class implement an interface with this name.
static boolean	classInstanceOf(java.lang.Class clss, java.lang.String inst) Is this Class object an instance of the class with this name.
static java.lang.Object	createObject(java.lang.Class clss) Create an object from a class.
static java.lang.Object	createObject(java.lang.String classname) Create an object from the classname.
static java.lang.Class	getClass(java.lang.String classname) Get the Class object for a classname.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassW

public ClassW()

Method Detail

createObject

public static java.lang.Object createObject(java.lang.String classname)

Create an object from the classname. Must have an empty constructor.

Parameters:

classname - String name of the class

Returns:

Object instance of the class or null

createObject

public static java.lang.Object createObject(java.lang.Class clss)

Create an object from a class.

Parameters:

clss - Class object to instantiate

Returns:

Object instance of the class or null

classExists

public static boolean classExists(java.lang.String classname)

Is this Class in the CLASSPATH

Parameters:

classname - String of the class

Returns:

boolean exists or not.

getClass

public static java.lang.Class getClass(java.lang.String classname)

Get the Class object for a classname.

Parameters:

classname - String of the class

Returns:

Class instance for the class.

classInstanceOf

public static boolean classInstanceOf(java.lang.Class clss,
                                      java.lang.String inst)

Is this Class object an instance of the class with this name.

Parameters:

clss - Class instance

inst - String name of potential supertype

Returns:

boolean was it an instanceof

classImplements

public static boolean classImplements(java.lang.Class clss,
                                      java.lang.String exts)

Does this Class implement an interface with this name.

Parameters:

clss - Class instance

exts - String name of potential interface

Returns:

boolean was it an implementor

classExtends

public static boolean classExtends(java.lang.Class clss,
                                   java.lang.String exts)

Does this Class extend a superclass with this name.

Parameters:

clss - Class instance

exts - String name of potential superclass

Returns:

boolean was it a superclass

callMain

public static void callMain(java.lang.String[] args)

callMain

public static void callMain(java.lang.String classname,
                            java.lang.String[] args)

callStatic

public static void callStatic(java.lang.String classname,
                              java.lang.String methodName,
                              java.lang.Class[] types,
                              java.lang.Object[] args)

Runs a static method on a class.

Parameters:

classname - String name of class to invoke on.

method - String name of method to call.

args - Object[] arguments to method.