Class ClassConfigurator


  • public class ClassConfigurator
    extends java.lang.Object
    This class will be replaced with the class that read info from the magic number configurator that reads info from the xml file. The name and the relative path of the magic number map file can be specified as value of the property org.jgroups.conf.magicNumberFile. It must be relative to one of the classpath elements, to allow the classloader to locate the file. If a value is not specified, MagicNumberReader.MAGIC_NUMBER_FILE is used, which defaults to "jg-magic-map.xml".
    Author:
    Filip Hanik, Bela Ban
    See Also:
    MagicNumberReader
    • Field Detail

      • log

        protected final org.apache.commons.logging.Log log
    • Constructor Detail

      • ClassConfigurator

        public ClassConfigurator()
    • Method Detail

      • add

        public void add​(short magic,
                        java.lang.Class clazz)
                 throws java.lang.IllegalArgumentException
        Method to register a user-defined header with jg-magic-map at runtime
        Parameters:
        magic - The magic number. Needs to be > 1024
        clazz - The class. Usually a subclass of Header
        Throws:
        java.lang.IllegalArgumentException - If the magic number is already taken, or the magic number is <= 1024
      • get

        public java.lang.Class get​(short magic)
        Returns a class for a magic number. Returns null if no class is found
        Parameters:
        magic - the magic number that maps to the class
        Returns:
        a Class object that represents a class that implements java.io.Externalizable
      • get

        public java.lang.Class get​(java.lang.String clazzname)
        Loads and returns the class from the class name
        Parameters:
        clazzname - a fully classified class name to be loaded
        Returns:
        a Class object that represents a class that implements java.io.Externalizable
      • getMagicNumber

        public short getMagicNumber​(java.lang.Class clazz)
        Returns the magic number for the class.
        Parameters:
        clazz - a class object that we want the magic number for
        Returns:
        the magic number for a class, -1 if no mapping is available
      • getMagicNumberFromObjectStreamClass

        public short getMagicNumberFromObjectStreamClass​(java.io.ObjectStreamClass objStream)
      • getObjectStreamClassFromMagicNumber

        public java.io.ObjectStreamClass getObjectStreamClassFromMagicNumber​(short magic_number)
      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object
      • printMagicMap

        public java.lang.String printMagicMap()
      • printClassMap

        public java.lang.String printClassMap()
      • main

        public static void main​(java.lang.String[] args)
                         throws java.lang.Exception
        Throws:
        java.lang.Exception