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## weka.core
Class ClassDiscovery

    java.lang.Object
      weka.core.ClassDiscovery

All Implemented Interfaces:
  RevisionHandler

    public class ClassDiscovery

extends java.lang.Object
implements RevisionHandler

This class is used for discovering classes that implement a certain interface or a derived from a certain class.

Version:
  $Revision: 5377 $
Author:
  FracPete (fracpete at waikato dot ac dot nz)
See Also:
  `ClassDiscovery.StringCompare`

Nested Class Summary
`static class` | `ClassDiscovery.StringCompare` compares two strings.

Field Summary
`static boolean` | `VERBOSE` whether to output some debug information.

Constructor Summary
`ClassDiscovery()`

Method Summary
`static void` | `clearCache()` clears the cache for class/classnames relation.
`static java.util.Vector` | `find(java.lang.Class cls, java.lang.String pkgname)` Checks the given package for classes that inherited from the given class, in case it's a class, or implement this class, in case it's an interface.
`static java.util.Vector` | `find(java.lang.Class cls, java.lang.String[] pkgnames)` Checks the given packages for classes that inherited from the given class, in case it's a class, or implement this class, in case it's an interface.
`static java.util.Vector` | `find(java.lang.String classname, java.lang.String pkgname)` Checks the given package for classes that inherited from the given class, in case it's a class, or implement this class, in case it's an interface.
`static java.util.Vector` | `find(java.lang.String classname, java.lang.String[] pkgnames)` Checks the given packages for classes that inherited from the given class, in case it's a class, or implement this class, in case it's an interface.
`static java.util.Vector` | `findPackages()` Lists all packages it can find in the classpath.
`java.lang.String` | `getRevision()` Returns the revision string.
`static boolean` | `hasInterface(java.lang.Class intf, java.lang.Class cls)` Checks whether the given class implements the given interface.
`static boolean` | `hasInterface(java.lang.String intf, java.lang.String cls)` Checks whether the given class implements the given interface.
`static boolean` | `isSubclass(java.lang.Class superclass, java.lang.Class otherclass)` Checks whether the "otherclass" is a subclass of the given "superclass".
`static boolean` | `isSubclass(java.lang.String superclass, java.lang.String otherclass)` Checks whether the "otherclass" is a subclass of the given "superclass".
`static void` | `main(java.lang.String[] args)` Possible calls: weka.core.ClassDiscovery <packages> Prints all the packages in the current classpath weka.core.ClassDiscovery <classname> <packagename(s)> Prints the classes it found.

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### VERBOSE

    public static final boolean VERBOSE

  whether to output some debug information.

  See Also:
    Constant Field Values

Constructor Detail

### ClassDiscovery

    public ClassDiscovery()

Method Detail

### isSubclass

    public static boolean isSubclass(java.lang.String superclass,
                                     java.lang.String otherclass)

  Checks whether the "otherclass" is a subclass of the given "superclass".

  Parameters:
    `superclass` - the superclass to check against
    `otherclass` - this class is checked whether it is a subclass of the the superclass
  Returns:
    TRUE if "otherclass" is a true subclass

### isSubclass

    public static boolean isSubclass(java.lang.Class superclass,
                                     java.lang.Class otherclass)

  Checks whether the "otherclass" is a subclass of the given "superclass".

  Parameters:
    `superclass` - the superclass to check against
    `otherclass` - this class is checked whether it is a subclass of the the superclass
  Returns:
    TRUE if "otherclass" is a true subclass

### hasInterface

    public static boolean hasInterface(java.lang.String intf,
                                       java.lang.String cls)

  Checks whether the given class implements the given interface.

  Parameters:
    `intf` - the interface to look for in the given class
    `cls` - the class to check for the interface
  Returns:
    TRUE if the class contains the interface

### hasInterface

    public static boolean hasInterface(java.lang.Class intf,
                                       java.lang.Class cls)

  Checks whether the given class implements the given interface.

  Parameters:
    `intf` - the interface to look for in the given class
    `cls` - the class to check for the interface
  Returns:
    TRUE if the class contains the interface

### find

    public static java.util.Vector find(java.lang.String classname,
                                        java.lang.String[] pkgnames)

  Checks the given packages for classes that inherited from the given class, in case it's a class, or implement this class, in case it's an interface.

  Parameters:
    `classname` - the class/interface to look for
    `pkgnames` - the packages to search in
  Returns:
    a list with all the found classnames

### find

    public static java.util.Vector find(java.lang.String classname,
                                        java.lang.String pkgname)

  Checks the given package for classes that inherited from the given class, in case it's a class, or implement this class, in case it's an interface.

  Parameters:
    `classname` - the class/interface to look for
    `pkgname` - the package to search in
  Returns:
    a list with all the found classnames

### find

    public static java.util.Vector find(java.lang.Class cls,
                                        java.lang.String[] pkgnames)

  Checks the given packages for classes that inherited from the given class, in case it's a class, or implement this class, in case it's an interface.

  Parameters:
    `cls` - the class/interface to look for
    `pkgnames` - the packages to search in
  Returns:
    a list with all the found classnames

### find

    public static java.util.Vector find(java.lang.Class cls,
                                        java.lang.String pkgname)

  Checks the given package for classes that inherited from the given class, in case it's a class, or implement this class, in case it's an interface.

  Parameters:
    `cls` - the class/interface to look for
    `pkgname` - the package to search in
  Returns:
    a list with all the found classnames

### findPackages

    public static java.util.Vector findPackages()

  Lists all packages it can find in the classpath.

  Returns:
    a list with all the found packages

### clearCache

    public static void clearCache()

  clears the cache for class/classnames relation.

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

  Specified by:
    `getRevision` in interface `RevisionHandler`
  Returns:
    the revision

### main

    public static void main(java.lang.String[] args)

  Possible calls:
  - weka.core.ClassDiscovery <packages>
    Prints all the packages in the current classpath
  - weka.core.ClassDiscovery <classname> <packagename(s)>
    Prints the classes it found.

  Parameters:
    `args` - the commandline arguments

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