kilim

Class WeavingClassLoader

java.lang.Object

java.lang.ClassLoader

kilim.KilimClassLoader

kilim.WeavingClassLoader

public class WeavingClassLoader
extends KilimClassLoader

Classloader that loads classes from the classpath spec given by the system property "kilim.class.path" and weaves them dynamically.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	WeavingClassLoader.Excludable

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	KILIM_CLASSPATH

Constructor Summary

Constructors

Constructor and Description
WeavingClassLoader()
WeavingClassLoader(java.lang.ClassLoader loader, java.net.URLClassLoader $proxy)

Method Summary

Modifier and Type	Method and Description
java.lang.Class<?>	define(java.lang.String name, byte[] code)
WeavingClassLoader	exclude(WeavingClassLoader.Excludable exclude) replace the exclude filter which determines whether a named class should be defined definitively by this loader or instead delegated to the parent loader.
protected java.lang.Class<?>	findClass(java.lang.String name)
static byte[]	findCode(java.lang.ClassLoader loader, java.lang.String name) read bytecode for the named class from a source classloader
static java.io.InputStream	getByteStream(java.lang.ClassLoader cl, java.lang.String name, java.lang.String cname, boolean system)
java.io.InputStream	getResourceAsStream(java.lang.String cname)
static java.net.URL[]	getURLs(java.lang.String[] classPaths)
java.lang.Class<?>	loadClass(java.lang.String name, boolean resolve)
static java.lang.String	makeResourceName(java.lang.String name) convert a fully qualified class name to a resource name.
static byte[]	readFully(FileLister.Entry fe)
static byte[]	readFully(java.io.InputStream is)
void	run(java.lang.String className, java.lang.String method, java.lang.String... args) run static method className.method(args) using reflection and this WeavingClassLoader
static java.lang.String	unmakeResourceName(java.lang.String cname)
java.net.URL	url(java.lang.String name)
ClassWeaver	weaveClass(java.lang.String name) load the bytecode for a class of a given name from the classpath and weave it

Methods inherited from class kilim.KilimClassLoader

isLoaded

Methods inherited from class java.lang.ClassLoader

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

Methods inherited from class java.lang.Object

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

Field Detail

KILIM_CLASSPATH

public static final java.lang.String KILIM_CLASSPATH

See Also:

Constant Field Values

Constructor Detail

WeavingClassLoader

public WeavingClassLoader()

WeavingClassLoader

public WeavingClassLoader(java.lang.ClassLoader loader,
                          java.net.URLClassLoader $proxy)

Method Detail

readFully

public static byte[] readFully(java.io.InputStream is)

getResourceAsStream

public java.io.InputStream getResourceAsStream(java.lang.String cname)

Overrides:

getResourceAsStream in class java.lang.ClassLoader

getURLs

public static java.net.URL[] getURLs(java.lang.String[] classPaths)

run

public void run(java.lang.String className,
                java.lang.String method,
                java.lang.String... args)
         throws java.lang.Exception

run static method className.method(args) using reflection and this WeavingClassLoader

Throws:

java.lang.Exception

exclude

public WeavingClassLoader exclude(WeavingClassLoader.Excludable exclude)

replace the exclude filter which determines whether a named class should be defined definitively by this loader or instead delegated to the parent loader. this is sometimes necessary to work with classes that may have been previously loaded, eg because they were used as a java agent

Parameters:

exclude - the filter to run

Returns:

loadClass

public java.lang.Class<?> loadClass(java.lang.String name,
                                    boolean resolve)
                             throws java.lang.ClassNotFoundException

Overrides:

loadClass in class java.lang.ClassLoader

Throws:

java.lang.ClassNotFoundException

getByteStream

public static java.io.InputStream getByteStream(java.lang.ClassLoader cl,
                                                java.lang.String name,
                                                java.lang.String cname,
                                                boolean system)

weaveClass

public ClassWeaver weaveClass(java.lang.String name)

load the bytecode for a class of a given name from the classpath and weave it

Parameters:

name - the fully qualified class name

Returns:

the weaver

findClass

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

Overrides:

findClass in class java.lang.ClassLoader

Throws:

java.lang.ClassNotFoundException

define

public java.lang.Class<?> define(java.lang.String name,
                                 byte[] code)

makeResourceName

public static java.lang.String makeResourceName(java.lang.String name)

convert a fully qualified class name to a resource name. Note: the Class and ClassLoader javadocs don't explicitly specify the string formats used for the various methods, so this conversion is potentially fragile

Parameters:

name - as returned by Class.getName

Returns:

the name in a format suitable for use with the various ClassLoader.getResource methods

unmakeResourceName

public static java.lang.String unmakeResourceName(java.lang.String cname)

findCode

public static byte[] findCode(java.lang.ClassLoader loader,
                              java.lang.String name)

read bytecode for the named class from a source classloader

Parameters:

loader - the classloader to get the bytecode from, or null for the current classloader

name - the internal name for the class as would be passed to loadClass

Returns:

a new instance, or null if the bytecode is not found

url

public java.net.URL url(java.lang.String name)

readFully

public static byte[] readFully(FileLister.Entry fe)
                        throws java.io.IOException

Throws:

java.io.IOException