Package org.apache.tools.ant.util

Class LoaderUtils

java.lang.Object

org.apache.tools.ant.util.LoaderUtils

public class LoaderUtils
extends Object

ClassLoader utility methods

Constructor Summary

Constructors

Constructor	Description
LoaderUtils()

Method Summary

Modifier and Type	Method	Description
static boolean	classExists(ClassLoader loader, String className)	Check if a classloader has a classname resource.
static String	classNameToResource(String className)	Return the resource name of a class name.
static File	getClassSource(Class<?> c)	Find the directory or jar file the class has been loaded from.
static ClassLoader	getContextClassLoader()	JDK1.1 compatible access to set the context class loader.
static File	getResourceSource(ClassLoader c, String resource)	Find the directory or a give resource has been loaded from.
static boolean	isContextLoaderAvailable()	Indicates if the context class loader methods are available
static void	setContextClassLoader(ClassLoader loader)	Set the context classloader

Methods inherited from class java.lang.Object

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

Constructor Details

LoaderUtils

public LoaderUtils()

Method Details

setContextClassLoader

public static void setContextClassLoader(ClassLoader loader)

Set the context classloader

Parameters:

loader - the ClassLoader to be used as the context class loader on the current thread.

getContextClassLoader

public static ClassLoader getContextClassLoader()

JDK1.1 compatible access to set the context class loader.

Returns:

the ClassLoader instance being used as the context classloader on the current thread. Returns null on JDK 1.1

isContextLoaderAvailable

public static boolean isContextLoaderAvailable()

Indicates if the context class loader methods are available

Returns:

true if the get and set methods dealing with the context classloader are available.

getClassSource

public static File getClassSource(Class<?> c)

Find the directory or jar file the class has been loaded from.

Parameters:

c - the class whose location is required.

Returns:

the file or jar with the class or null if we cannot determine the location.

Since:

Ant 1.6

getResourceSource

public static File getResourceSource(ClassLoader c,
 String resource)

Find the directory or a give resource has been loaded from.

Parameters:

c - the classloader to be consulted for the source

resource - the resource whose location is required.

Returns:

the file with the resource source or null if we cannot determine the location.

Since:

Ant 1.6

classNameToResource

public static String classNameToResource(String className)

Return the resource name of a class name.

Parameters:

className - the name of the class to convert.

Returns:

the corresponding resource name.

Since:

Ant 1.7.0.

classExists

public static boolean classExists(ClassLoader loader,
 String className)

Check if a classloader has a classname resource.

Parameters:

loader - the classloader to look it.

className - the name of the class to look for.

Returns:

true if the class exists, false otherwise

Since:

Ant 1.7.0.