Constructor Detail

• ClassUtils

  public ClassUtils()

Method Detail

• setDefaultClassLoader

  public static void setDefaultClassLoader(java.lang.ClassLoader loader)

  Set the default ClassLoader. If loader is null, the default loader is not changed.

  Parameters:

  loader - the new default ClassLoader

• getDefaultClassLoader

  public static java.lang.ClassLoader getDefaultClassLoader()

• setClassLoader

  public static void setClassLoader(java.lang.String className,
                                    java.lang.ClassLoader loader)

  Set the ClassLoader associated with the given className. If either the class name or the loader are null, no action is performed.

  Parameters:

  className - the name of a class

  loader - the ClassLoader for the class

• getClassLoader

  public static java.lang.ClassLoader getClassLoader(java.lang.String className)

  Obtain the ClassLoader (if any) associated with the given className.

  Parameters:

  className - the name of a class

  Returns:

  class loader

• removeClassLoader

  public static void removeClassLoader(java.lang.String className)

  Deregister the ClassLoader for a given className.

  Parameters:

  className - the name of a class

• forName

  public static java.lang.Class forName(java.lang.String className)
                                 throws java.lang.ClassNotFoundException

  Use this method instead of Class.forName

  Parameters:

  className - Class name

  Returns:

  java class

  Throws:

  java.lang.ClassNotFoundException - if the class is not found

• forName

  public static java.lang.Class forName(java.lang.String _className,
                                        boolean init,
                                        java.lang.ClassLoader _loader)
                                 throws java.lang.ClassNotFoundException

  Use this method instead of Class.forName (String className, boolean init, ClassLoader loader)

  Parameters:

  _className - Class name

  init - initialize the class

  _loader - class loader

  Returns:

  java class

  Throws:

  java.lang.ClassNotFoundException - if the class is not found

• getResourceAsStream

  public static java.io.InputStream getResourceAsStream(java.lang.Class clazz,
                                                        java.lang.String resource,
                                                        boolean checkThreadContextFirst)

  Get an input stream from a named resource. Tries

  1. the classloader that loaded "clazz" first,
  2. the system classloader
  3. the class "clazz" itself

  Parameters:

  clazz - class to use in the lookups

  resource - resource string to look for

  checkThreadContextFirst - check the thread context first?

  Returns:

  input stream if found, or null

• getResourceAsStream

  public static java.io.InputStream getResourceAsStream(java.lang.Class clazz,
                                                        java.lang.String resource)

  Get an input stream from a named resource. Tries

  1. the classloader that loaded "clazz" first,
  2. the system classloader
  3. the class "clazz" itself

  Parameters:

  clazz - class to use in the lookups

  resource - resource string to look for

  Returns:

  input stream if found, or null

• createClassLoader

  public static java.lang.ClassLoader createClassLoader(java.lang.String classpath,
                                                        java.lang.ClassLoader parent)
                                                 throws java.lang.SecurityException

  Creates a new ClassLoader from a classpath specification and a parent class loader. The classpath string will be split using the system path seperator character (e.g. : or ;), just as the java system-wide class path is processed.

  Parameters:

  classpath - the classpath String

  parent - the parent ClassLoader, or null if the default is to be used

  Throws:

  java.lang.SecurityException - if you don't have privilages to create class loaders

  java.lang.IllegalArgumentException - if your classpath string is silly