org.apache.airavata.xbaya.jython.runner

Class JythonClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

org.apache.airavata.xbaya.jython.runner.JythonClassLoader

public class JythonClassLoader
extends SecureClassLoader

This class loader loads jython related classes without counting on parent class loader. This is because jython related classes use a lot of static fields and cannot be used to invoke Jython scripts multiple times.

Constructor Summary

Constructors

Constructor and Description
JythonClassLoader(ClassLoader parent) Constructs a JythonClassLoader.

Method Summary

Methods

Modifier and Type	Method and Description
void	cleanUp() Cleans up temporary files.
void	clearAssertionStatus()
protected Package	definePackage(String name, String specTitle, String specVersion, String specVendor, String implTitle, String implVersion, String implVendor, URL sealBase)
protected Class<?>	findClass(String name)
protected String	findLibrary(String libname)
protected URL	findResource(String name)
protected Enumeration<URL>	findResources(String name)
protected Package	getPackage(String name)
protected Package[]	getPackages()
protected PermissionCollection	getPermissions(CodeSource codesource)
URL	getResource(String name)
InputStream	getResourceAsStream(String name)
Enumeration<URL>	getResources(String name)
JarFile	getXBayaJarFile()
Class<?>	loadClass(String className)
Class<?>	loadClass(String name, boolean resolveIt)
void	setClassAssertionStatus(String className, boolean enabled)
void	setDefaultAssertionStatus(boolean enabled)
void	setPackageAssertionStatus(String packageName, boolean enabled)

Methods inherited from class java.security.SecureClassLoader

defineClass, defineClass

Methods inherited from class java.lang.ClassLoader

defineClass, defineClass, defineClass, defineClass, findLoadedClass, findSystemClass, getClassLoadingLock, getParent, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, registerAsParallelCapable, resolveClass, setSigners

Methods inherited from class java.lang.Object

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

Constructor Detail

JythonClassLoader

public JythonClassLoader(ClassLoader parent)

Constructs a JythonClassLoader.

Parameters:

parent - the parent class loader. This has to be explicitly passed because WebStart applications use user-level class loader. The default system loader cannot load classes in the downloaded jar files.

Method Detail

getXBayaJarFile

public JarFile getXBayaJarFile()

Returns:

XBaya jar file.

cleanUp

public void cleanUp()

Cleans up temporary files.

loadClass

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

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

See Also:

ClassLoader.loadClass(java.lang.String)

loadClass

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

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

See Also:

ClassLoader.loadClass(java.lang.String, boolean)

findClass

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

Overrides:

findClass in class ClassLoader

Throws:

ClassNotFoundException

getPermissions

protected PermissionCollection getPermissions(CodeSource codesource)

Overrides:

getPermissions in class SecureClassLoader

See Also:

SecureClassLoader.getPermissions(java.security.CodeSource)

clearAssertionStatus

public void clearAssertionStatus()

Overrides:

clearAssertionStatus in class ClassLoader

See Also:

ClassLoader.clearAssertionStatus()

definePackage

protected Package definePackage(String name,
                    String specTitle,
                    String specVersion,
                    String specVendor,
                    String implTitle,
                    String implVersion,
                    String implVendor,
                    URL sealBase)
                         throws IllegalArgumentException

Overrides:

definePackage in class ClassLoader

Throws:

IllegalArgumentException

See Also:

ClassLoader.definePackage(java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.net.URL)

findLibrary

protected String findLibrary(String libname)

Overrides:

findLibrary in class ClassLoader

See Also:

ClassLoader.findLibrary(java.lang.String)

findResource

protected URL findResource(String name)

Overrides:

findResource in class ClassLoader

See Also:

ClassLoader.findResource(java.lang.String)

findResources

protected Enumeration<URL> findResources(String name)
                                  throws IOException

Overrides:

findResources in class ClassLoader

Throws:

IOException

See Also:

ClassLoader.findResources(java.lang.String)

getPackage

protected Package getPackage(String name)

Overrides:

getPackage in class ClassLoader

See Also:

ClassLoader.getPackage(java.lang.String)

getPackages

protected Package[] getPackages()

Overrides:

getPackages in class ClassLoader

See Also:

ClassLoader.getPackages()

getResource

public URL getResource(String name)

Overrides:

getResource in class ClassLoader

See Also:

ClassLoader.getResource(java.lang.String)

getResourceAsStream

public InputStream getResourceAsStream(String name)

Overrides:

getResourceAsStream in class ClassLoader

See Also:

ClassLoader.getResourceAsStream(java.lang.String)

getResources

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

Overrides:

getResources in class ClassLoader

Throws:

IOException

See Also:

ClassLoader.getResources(java.lang.String)

setClassAssertionStatus

public void setClassAssertionStatus(String className,
                           boolean enabled)

Overrides:

setClassAssertionStatus in class ClassLoader

See Also:

ClassLoader.setClassAssertionStatus(java.lang.String, boolean)

setDefaultAssertionStatus

public void setDefaultAssertionStatus(boolean enabled)

Overrides:

setDefaultAssertionStatus in class ClassLoader

See Also:

ClassLoader.setDefaultAssertionStatus(boolean)

setPackageAssertionStatus

public void setPackageAssertionStatus(String packageName,
                             boolean enabled)

Overrides:

setPackageAssertionStatus in class ClassLoader

See Also:

ClassLoader.setPackageAssertionStatus(java.lang.String, boolean)