org.eclipse.jetty.webapp

Class WebAppClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

org.eclipse.jetty.webapp.WebAppClassLoader

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

OSGiWebappClassLoader

public class WebAppClassLoader
extends URLClassLoader

ClassLoader for HttpContext. Specializes URLClassLoader with some utility and file mapping methods. This loader defaults to the 2.3 servlet spec behavior where non system classes are loaded from the classpath in preference to the parent loader. Java2 compliant loading, where the parent loader always has priority, can be selected with the WebAppContext.setParentLoaderPriority(boolean) method and influenced with WebAppContext.isServerClass(String) and WebAppContext.isSystemClass(String). If no parent class loader is provided, then the current thread context classloader will be used. If that is null then the classloader that loaded this class is used as the parent.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	WebAppClassLoader.Context The Context in which the classloader operates.

Constructor Summary

Constructors

Constructor and Description
WebAppClassLoader(ClassLoader parent, WebAppClassLoader.Context context) Constructor.
WebAppClassLoader(WebAppClassLoader.Context context) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	addClassFileTransformer(ClassFileTransformer transformer) Deprecated.
void	addClassPath(Resource resource)
void	addClassPath(String classPath)
void	addJars(Resource lib) Add elements to the class path for the context from the jar and zip files found in the specified resource.
void	addTransformer(ClassFileTransformer transformer)
protected Class<?>	findClass(String name)
WebAppClassLoader.Context	getContext()
String	getName()
PermissionCollection	getPermissions(CodeSource cs)
URL	getResource(String name) Get a resource from the classloader NOTE: this method provides a convenience of hacking off a leading / should one be present.
Enumeration<URL>	getResources(String name)
Class<?>	loadClass(String name)
protected Class<?>	loadClass(String name, boolean resolve)
boolean	removeClassFileTransformer(ClassFileTransformer transformer) Deprecated.
boolean	removeTransformer(ClassFileTransformer transformer)
void	setName(String name)
String	toString()

Methods inherited from class java.net.URLClassLoader

addURL, close, definePackage, findResource, findResources, getResourceAsStream, getURLs, newInstance, newInstance

Methods inherited from class java.security.SecureClassLoader

defineClass, defineClass

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findSystemClass, getClassLoadingLock, getPackage, getPackages, getParent, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, registerAsParallelCapable, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

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

Constructor Detail

WebAppClassLoader

public WebAppClassLoader(WebAppClassLoader.Context context)
                  throws IOException

Constructor.

Throws:

IOException

WebAppClassLoader

public WebAppClassLoader(ClassLoader parent,
                 WebAppClassLoader.Context context)
                  throws IOException

Constructor.

Throws:

IOException

Method Detail

getName

public String getName()

Returns:

the name of the classloader

setName

public void setName(String name)

Parameters:

name - the name of the classloader

getContext

public WebAppClassLoader.Context getContext()

addClassPath

public void addClassPath(Resource resource)
                  throws IOException

Parameters:

resource - Comma or semicolon separated path of filenames or URLs pointing to directories or jar files. Directories should end with '/'.

Throws:

IOException

addClassPath

public void addClassPath(String classPath)
                  throws IOException

Parameters:

classPath - Comma or semicolon separated path of filenames or URLs pointing to directories or jar files. Directories should end with '/'.

Throws:

IOException

addJars

public void addJars(Resource lib)

Add elements to the class path for the context from the jar and zip files found in the specified resource.

Parameters:

lib - the resource that contains the jar and/or zip files.

getPermissions

public PermissionCollection getPermissions(CodeSource cs)

Overrides:

getPermissions in class URLClassLoader

getResources

public Enumeration<URL> getResources(String name)
                              throws IOException

Overrides:

getResources in class ClassLoader

Throws:

IOException

getResource

public URL getResource(String name)

Get a resource from the classloader NOTE: this method provides a convenience of hacking off a leading / should one be present. This is non-standard and it is recommended to not rely on this behavior

Overrides:

getResource in class ClassLoader

loadClass

public Class<?> loadClass(String name)
                   throws ClassNotFoundException

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

loadClass

protected Class<?> loadClass(String name,
                 boolean resolve)
                      throws ClassNotFoundException

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

addClassFileTransformer

public void addClassFileTransformer(ClassFileTransformer transformer)

Deprecated.

See Also:

addTransformer

removeClassFileTransformer

public boolean removeClassFileTransformer(ClassFileTransformer transformer)

Deprecated.

See Also:

removeTransformer

addTransformer

public void addTransformer(ClassFileTransformer transformer)

See Also:

addClassFileTransformer

removeTransformer

public boolean removeTransformer(ClassFileTransformer transformer)

See Also:

removeClassFileTransformer

findClass

protected Class<?> findClass(String name)
                      throws ClassNotFoundException

Overrides:

findClass in class URLClassLoader

Throws:

ClassNotFoundException

toString

public String toString()

Overrides:

toString in class Object