Package org.apache.commons.discovery.tools

Class ClassUtils

  • public class ClassUtils
extends java.lang.Object
    Author:
    Richard A. Sitze

    • Constructor Summary

      Constructors 
      Constructor Description
      ClassUtils()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.reflect.Method findPublicStaticMethod​(java.lang.Class clazz, java.lang.Class returnType, java.lang.String methodName, java.lang.Class[] paramTypes)  
      static java.lang.String getPackageName​(java.lang.Class clazz)
      Get package name.
      static java.lang.Object newInstance​(java.lang.Class impl, java.lang.Class[] paramClasses, java.lang.Object[] params)
      Instantiate a new
      static void setLog​(org.apache.commons.logging.Log _log)  
      static void verifyAncestory​(java.lang.Class spi, java.lang.Class impl)
      Throws exception if impl does not implement or extend the SPI.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • ClassUtils

        public ClassUtils()

    • Method Detail

      • setLog

        public static void setLog​(org.apache.commons.logging.Log _log)

      • getPackageName

        public static java.lang.String getPackageName​(java.lang.Class clazz)
        Get package name. Not all class loaders 'keep' package information, in which case Class.getPackage() returns null. This means that calling Class.getPackage().getName() is unreliable at best.

      • findPublicStaticMethod

        public static java.lang.reflect.Method findPublicStaticMethod​(java.lang.Class clazz,
                                                              java.lang.Class returnType,
                                                              java.lang.String methodName,
                                                              java.lang.Class[] paramTypes)
        Returns:
        Method 'public static returnType methodName(paramTypes)', if found to be directly implemented by clazz.

      • newInstance

        public static java.lang.Object newInstance​(java.lang.Class impl,
                                           java.lang.Class[] paramClasses,
                                           java.lang.Object[] params)
                                    throws DiscoveryException,
                                           java.lang.InstantiationException,
                                           java.lang.IllegalAccessException,
                                           java.lang.NoSuchMethodException,
                                           java.lang.reflect.InvocationTargetException
        Instantiate a new
        Throws:
        DiscoveryException
        java.lang.InstantiationException
        java.lang.IllegalAccessException
        java.lang.NoSuchMethodException
        java.lang.reflect.InvocationTargetException

      • verifyAncestory

        public static void verifyAncestory​(java.lang.Class spi,
                                   java.lang.Class impl)
                            throws DiscoveryException
        Throws exception if impl does not implement or extend the SPI.
        Throws:
        DiscoveryException