org.codehaus.commons.compiler.lang

Class ClassLoaders

java.lang.Object

org.codehaus.commons.compiler.lang.ClassLoaders

public final class ClassLoaders
extends Object

Utility methods around the ClassLoader.

Field Summary

Fields

Modifier and Type	Field and Description
static ClassLoader	BOOTCLASSPATH_CLASS_LOADER The ClassLoader that loads the classes on the currently executing JVM's "boot class path", i.e. the JARs in the JRE's "lib" and "lib/ext" directories, but not the JARs and class directories specified through the --classpath command line option.
static ClassLoader	CLASSPATH_CLASS_LOADER The ClassLoader that loads the classes on the currently executing JVM's "class path", i.e. the JARs in the JRE's "lib" and "lib/ext" directories, and the JARs and class directories specified through the class path.

Method Summary

Modifier and Type	Method and Description
static ClassLoader	getsResourceAsStream(ResourceFinder finder, ClassLoader parent) Creates and returns a ClassLoader that implements ClassLoader.getResourceAsStream(String) via a ResourceFinder.
static Map<String,URL>	getSubresources(ClassLoader classLoader, String name, boolean includeDirectories, boolean recurse) Returns a name-to-URL mapping of all resources "under" a given directory name.
static Map<String,URL>	getSubresourcesOf(URL root, String rootName, boolean includeDirectories, boolean recurse) Returns a name-to-URL mapping of all resources "under" a given root resource.

Methods inherited from class java.lang.Object

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

Field Detail

CLASSPATH_CLASS_LOADER

public static final ClassLoader CLASSPATH_CLASS_LOADER

The ClassLoader that loads the classes on the currently executing JVM's "class path", i.e. the JARs in the JRE's "lib" and "lib/ext" directories, and the JARs and class directories specified through the class path.

BOOTCLASSPATH_CLASS_LOADER

public static final ClassLoader BOOTCLASSPATH_CLASS_LOADER

The ClassLoader that loads the classes on the currently executing JVM's "boot class path", i.e. the JARs in the JRE's "lib" and "lib/ext" directories, but not the JARs and class directories specified through the --classpath command line option.

Method Detail

getsResourceAsStream

public static ClassLoader getsResourceAsStream(ResourceFinder finder,
                                               @Nullable
                                               ClassLoader parent)

Creates and returns a ClassLoader that implements ClassLoader.getResourceAsStream(String) via a ResourceFinder.

ClassLoader.getResource(String) returns a non-null value iff then resoure finder finds a LocatableResource.

Notice that ClassLoader.getResources(String) is not overridden.

getSubresources

public static Map<String,URL> getSubresources(@Nullable
                                              ClassLoader classLoader,
                                              String name,
                                              boolean includeDirectories,
                                              boolean recurse)
                                       throws IOException

Returns a name-to-URL mapping of all resources "under" a given directory name.

Iff the name does not end with a slash, then calling this method is equivalent with calling ClassLoader.getResource(String).

Otherwise, if the name does end with a slash, then this method returns a name-to-URL mapping of all content resources who's names begin with the given name. Iff recurse is false, then only immediate subresources are included. Iff includeDirectories is true, then also directory resources are included in the result set; their names all ending with a slash.

If multiple resources have the name, then the resources are retrieved from the first occurrence.

Parameters:

classLoader - The class loader to use; null means use the system class loader

name - No leading slash

Returns:

Keys ending with a slash map to "directory resources", the other keys map to "content resources"

Throws:

IOException

getSubresourcesOf

public static Map<String,URL> getSubresourcesOf(URL root,
                                                String rootName,
                                                boolean includeDirectories,
                                                boolean recurse)
                                         throws IOException

Returns a name-to-URL mapping of all resources "under" a given root resource.

If the root designates a "content resource" (as opposed to a "directory resource"), then the method returns Collections.singletonMap(name, rootName).

Otherwise, if the root designates a "directory resource", then this method returns a name-to-URL mapping of all content resources that are located "under" the root resource. Iff recurse is false, then only immediate subresources are included. Iff includeDirectories is true, then directory resources are also included in the result set; their names all ending with a slash.

Returns:

Keys ending with a slash map to "directory resources", the other keys map to "content resources"

Throws:

IOException