org.zkoss.zel.impl.util

Class ClassUtil

java.lang.Object

org.zkoss.zel.impl.util.ClassUtil

public class ClassUtil
extends java.lang.Object

Class related utilities.

Author:

tomyeh

Constructor Summary

Constructors

Constructor and Description
ClassUtil()

Method Summary

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

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

Throws:

java.lang.NoSuchMethodException

newInstance

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

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

Throws:

java.lang.NoSuchMethodException

java.lang.InstantiationException

java.lang.reflect.InvocationTargetException

java.lang.IllegalAccessException

forNameByThread

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

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

Throws:

java.lang.ClassNotFoundException

getContextClassLoader

public static java.lang.ClassLoader getContextClassLoader(java.lang.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(java.lang.Object value,
                                 java.lang.Class<?> clz)