weka.core

Class ClassCache

java.lang.Object

weka.core.ClassCache

All Implemented Interfaces:

RevisionHandler

public class ClassCache
extends java.lang.Object
implements RevisionHandler

A singleton that stores all classes on the classpath.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ClassCache.ClassFileFilter For filtering classes.
static class	ClassCache.DirectoryFilter For filtering classes.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	DEFAULT_PACKAGE the key for the default package.
protected java.util.Hashtable<java.lang.String,java.util.HashSet<java.lang.String>>	m_Cache for caching all classes on the class path (package-name <-> HashSet with classnames).
static boolean	VERBOSE whether to output some debug information.

Constructor Summary

Constructors

Constructor and Description
ClassCache() Initializes the cache.

Method Summary

Modifier and Type	Method and Description
boolean	add(java.lang.String classname) Adds the classname to the cache.
static java.lang.String	cleanUp(java.lang.String classname) Fixes the classname, turns "/" and "\" into "." and removes ".class".
static java.lang.String	extractPackage(java.lang.String classname) Extracts the package name from the (clean) classname.
java.util.ArrayList<java.lang.String>	find(java.lang.String matchText) Find all classes that have the supplied matchText String in their suffix.
java.util.HashSet<java.lang.String>	getClassnames(java.lang.String pkgname) Returns all the classes for the given package.
java.lang.String	getRevision() Returns the revision string.
protected void	initFromClasspathPart(java.lang.String part) Analyzes a part of the classpath.
protected void	initFromDir(java.io.File dir) Fills the class cache with classes in the specified directory.
protected void	initFromDir(java.lang.String prefix, java.io.File dir) Fills the class cache with classes in the specified directory.
protected void	initFromJar(java.io.File file) Fills the class cache with classes from the specified jar.
protected void	initFromManifest(java.util.jar.Manifest manifest) Analyzes the MANIFEST.MF file of a jar whether additional jars are listed in the "Class-Path" key.
protected void	initialize() Initializes the cache.
protected void	initializeNew()
static void	main(java.lang.String[] args) For testing only.
java.util.Enumeration<java.lang.String>	packages() Returns all the stored packages.
boolean	remove(java.lang.String classname) Removes the classname from the cache.

Methods inherited from class java.lang.Object

clone, equals, finalize, 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

DEFAULT_PACKAGE

public static final java.lang.String DEFAULT_PACKAGE

the key for the default package.

See Also:

Constant Field Values

m_Cache

protected java.util.Hashtable<java.lang.String,java.util.HashSet<java.lang.String>> m_Cache

for caching all classes on the class path (package-name <-> HashSet with classnames).

Constructor Detail

ClassCache

public ClassCache()

Initializes the cache.

Method Detail

cleanUp

public static java.lang.String cleanUp(java.lang.String classname)

Fixes the classname, turns "/" and "\" into "." and removes ".class".

Parameters:

classname - the classname to process

Returns:

the processed classname

extractPackage

public static java.lang.String extractPackage(java.lang.String classname)

Extracts the package name from the (clean) classname.

Parameters:

classname - the classname to extract the package from

Returns:

the package name

add

public boolean add(java.lang.String classname)

Adds the classname to the cache.

Parameters:

classname - the classname, automatically removes ".class" and turns "/" or "\" into "."

Returns:

true if adding changed the cache

remove

public boolean remove(java.lang.String classname)

Removes the classname from the cache.

Parameters:

classname - the classname to remove

Returns:

true if the removal changed the cache

initFromDir

protected void initFromDir(java.lang.String prefix,
                           java.io.File dir)

Fills the class cache with classes in the specified directory.

Parameters:

prefix - the package prefix so far, null for default package

dir - the directory to search

initFromDir

protected void initFromDir(java.io.File dir)

Fills the class cache with classes in the specified directory.

Parameters:

dir - the directory to search

initFromManifest

protected void initFromManifest(java.util.jar.Manifest manifest)

Analyzes the MANIFEST.MF file of a jar whether additional jars are listed in the "Class-Path" key.

Parameters:

manifest - the manifest to analyze

initFromJar

protected void initFromJar(java.io.File file)

Fills the class cache with classes from the specified jar.

Parameters:

file - the jar to inspect

packages

public java.util.Enumeration<java.lang.String> packages()

Returns all the stored packages.

Returns:

the package names

getClassnames

public java.util.HashSet<java.lang.String> getClassnames(java.lang.String pkgname)

Returns all the classes for the given package.

Parameters:

pkgname - the package to get the classes for

Returns:

the classes (sorted by name)

initFromClasspathPart

protected void initFromClasspathPart(java.lang.String part)

Analyzes a part of the classpath.

Parameters:

part - the part to analyze

initialize

protected void initialize()

Initializes the cache.

initializeNew

protected void initializeNew()

find

public java.util.ArrayList<java.lang.String> find(java.lang.String matchText)

Find all classes that have the supplied matchText String in their suffix.

Parameters:

matchText - the text to match

Returns:

an array list of matching fully qualified class names.

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)

For testing only.

Parameters:

args - ignored