org.zkoss.zel.impl.util

Class ClassUtil

java.lang.Object

org.zkoss.zel.impl.util.ClassUtil

public class ClassUtil
extends Object

Class related utilities.

Author:

tomyeh

Constructor Summary

Constructors

Constructor and Description
ClassUtil()

Method Summary

Modifier and Type	Method and Description
static Class<?>	forNameByThread(String clsName) Returns the Class object of the specified class name, using the current thread's context class loader.
static Method	getCloseMethod(Class<?> cls, String name, Class<?>[] argTypes) Gets one of the close methods -- a close method is a method with the same name and the compatible argument type.
static ClassLoader	getContextClassLoader(Class<?> reference) Returns the context ClassLoader for the reference class.
static boolean	isInstance(Object value, Class<?> clz)
static Object	newInstance(Class<?> cls, Object[] args) Instantiates a new instance of the specified class with the specified argument.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassUtil

public ClassUtil()

Method Detail

getCloseMethod

public static final Method getCloseMethod(Class<?> cls,
                                          String name,
                                          Class<?>[] argTypes)
                                   throws NoSuchMethodException

Gets one of the close methods -- a close method is a method with the same name and the compatible argument type.

Throws:

NoSuchMethodException

newInstance

public static final Object newInstance(Class<?> cls,
                                       Object[] args)
                                throws NoSuchMethodException,
                                       InstantiationException,
                                       InvocationTargetException,
                                       IllegalAccessException

Instantiates a new instance of the specified class with the specified argument.

Throws:

NoSuchMethodException

InstantiationException

InvocationTargetException

IllegalAccessException

forNameByThread

public static final Class<?> forNameByThread(String clsName)
                                      throws ClassNotFoundException

Returns the Class object of the specified class name, using the current thread's context class loader.

Throws:

ClassNotFoundException

getContextClassLoader

public static ClassLoader getContextClassLoader(Class<?> reference)

Returns the context ClassLoader for the reference class.

Default: returns from the current thread.
Or specify the library property of org.zkoss.lang.contextClassLoader.class in zk.xml to provide a customized class loader.

Parameters:

reference - the reference class where it is invoked from.

Since:

8.0.2

isInstance

public static boolean isInstance(Object value,
                                 Class<?> clz)