net.myrrix.common

Class ClassUtils

java.lang.Object

net.myrrix.common.ClassUtils

public final class ClassUtils
extends Object

Class-related utility methods.

Since:

1.0

Author:

Sean Owen

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	classExists(String implClassName)
static <T extends Cloneable> T	clone(T original) Clones "Cloneable" objects even though this actually requires reflection to expose.
static <T> Class<? extends T>	loadClass(String implClassName, Class<T> superClass) Loads a named implementation class, a subclass of a given supertype.
static Field	loadField(Class<?> clazz, String fieldName)
static <T> T	loadFromRemote(String implClassName, Class<T> superClass, URL url) Load an instance of a class from a JAR file at a remote location.
static <T> T	loadInstanceOf(Class<T> clazz)
static <T> T	loadInstanceOf(Class<T> clazz, Class<?>[] constructorTypes, Object[] constructorArgs)
static <T> T	loadInstanceOf(String implClassName, Class<T> superClass) Like loadInstanceOf(String, Class, Class[], Object[]) for no-arg constructors.
static <T> T	loadInstanceOf(String implClassName, Class<T> superClass, Class<?>[] constructorTypes, Object[] constructorArgs) Loads and instantiates a named implementation class, a subclass of a given supertype, whose constructor takes the given arguments.

Methods inherited from class java.lang.Object

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

Method Detail

loadInstanceOf

public static <T> T loadInstanceOf(Class<T> clazz)

loadInstanceOf

public static <T> T loadInstanceOf(Class<T> clazz,
                   Class<?>[] constructorTypes,
                   Object[] constructorArgs)

loadInstanceOf

public static <T> T loadInstanceOf(String implClassName,
                   Class<T> superClass)

Like loadInstanceOf(String, Class, Class[], Object[]) for no-arg constructors.

loadInstanceOf

public static <T> T loadInstanceOf(String implClassName,
                   Class<T> superClass,
                   Class<?>[] constructorTypes,
                   Object[] constructorArgs)

Loads and instantiates a named implementation class, a subclass of a given supertype, whose constructor takes the given arguments.

Parameters:

implClassName - implementation class name

superClass - superclass or interface that the implementation extends

constructorTypes - argument types of constructor to use

constructorArgs - actual constructor arguments

Returns:

instance of implClassName

loadFromRemote

public static <T> T loadFromRemote(String implClassName,
                   Class<T> superClass,
                   URL url)

Load an instance of a class from a JAR file at a remote location.

Parameters:

implClassName - implementation class name

superClass - superclass or interface that the implementation extends

url - URL pointing to a JAR file containing the class

Returns:

instance of implClassName

loadClass

public static <T> Class<? extends T> loadClass(String implClassName,
                               Class<T> superClass)

Loads a named implementation class, a subclass of a given supertype.

Parameters:

implClassName - implementation class name

superClass - superclass or interface that the implementation extends

Returns:

Class named by implClassName

classExists

public static boolean classExists(String implClassName)

Parameters:

implClassName - class name to text

Returns:

true if the class exists in the JVM and can be loaded

loadField

public static Field loadField(Class<?> clazz,
              String fieldName)

Parameters:

clazz - the class containing the field to load

fieldName - the field name

Returns:

the named Field, made accessible, from the given Class

clone

public static <T extends Cloneable> T clone(T original)

Clones "Cloneable" objects even though this actually requires reflection to expose.