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org.apache.tools.ant.util

Class LoaderUtils

public class LoaderUtils
extends java.lang.Object
ClassLoader utility methods

Method Summary

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

Method Details

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 classexists, false otherwise
Since:
Ant 1.7.0.

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.

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

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

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

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.

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.

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