Package org.zkoss.zel.impl.util

Class ClassUtil

  • public class ClassUtil
extends java.lang.Object
    Class related utilities.
    Author:
    tomyeh

    • Constructor Summary

      Constructors 
      Constructor Description
      ClassUtil()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method 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)