Package jade.core.management

Class JarClassLoader

java.lang.Object

java.lang.ClassLoader

jade.core.management.JarClassLoader

public class JarClassLoader
extends ClassLoader

This ClassLoader is intended to be used to load agent classes packed within a jar file. If the specified jar does not exist this ClassLoader will attempt to load classes from the system ClassLoader.

Version:

1.2

Author:

Jordi Cucurull Juan, Joan Ametller Esquerra

Field Summary

Fields

Modifier and Type	Field	Description
static int	BUFFER_SIZE

Constructor Summary

Constructors

Constructor	Description
JarClassLoader(File[] ff, ClassLoader parent)
JarClassLoader(File f, ClassLoader parent)

Method Summary

Modifier and Type	Method	Description
void	close()	Method which close the JAR file.
protected void	finalize()	Clean up the JarClassLoader.
protected Class	findClass(String className)	Get a class from within the JAR file used in this classloader.
URL	findResource(String name)	Get a resource from within this classloader.
String	getJarFileName()	Get the Jar filename.

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResources, findSystemClass, getClassLoadingLock, getDefinedPackage, getDefinedPackages, getName, getPackage, getPackages, getParent, getPlatformClassLoader, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, getUnnamedModule, isRegisteredAsParallelCapable, loadClass, loadClass, registerAsParallelCapable, resolveClass, resources, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

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

Field Detail

BUFFER_SIZE

public static final int BUFFER_SIZE

See Also:

Constant Field Values

Constructor Detail

JarClassLoader

public JarClassLoader(File f,
                      ClassLoader parent)
               throws IOException

Parameters:

Path - and name of the JAR file

Throws:

IOException - If there are problems opening the file

JarClassLoader

public JarClassLoader(File[] ff,
                      ClassLoader parent)
               throws IOException

Throws:

IOException

Method Detail

close

public void close()

Method which close the JAR file.

getJarFileName

public String getJarFileName()

Get the Jar filename.

Returns:

String - Jar absolute path.

findClass

protected Class findClass(String className)
                   throws ClassNotFoundException

Get a class from within the JAR file used in this classloader.

Overrides:

findClass in class ClassLoader

Throws:

ClassNotFoundException

findResource

public URL findResource(String name)

Get a resource from within this classloader. public InputStream getResourceAsStream(String name) { if (_jarFile != null) { ZipEntry zEntry = _jarFile.getEntry(name); try { if (zEntry != null) { return _jarFile.getInputStream(zEntry); } else return null; } catch (IOException ioe) { return null; } } else { return null; } }

Overrides:

findResource in class ClassLoader

finalize

protected void finalize()
                 throws Throwable

Clean up the JarClassLoader. This means closing the JAR file if it has not explicitly done before by using the provided close() method.

Overrides:

finalize in class Object

Throws:

Throwable