org.jikesrvm.classloader

Class BootstrapClassLoader

java.lang.Object

java.lang.ClassLoader

org.jikesrvm.classloader.BootstrapClassLoader

public final class BootstrapClassLoader
extends ClassLoader

Implements an object that functions as the bootstrap class loader. This class is a Singleton pattern.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static interface	BootstrapClassLoader.Handler<T>

Field Summary

Fields

Modifier and Type	Field and Description
private static BootstrapClassLoader	bootstrapClassLoader
private static String	bootstrapClasspath Places whence we load bootstrap .class files.
private ImmutableEntryHashMapRVM<String,RVMType>	loaded
static String	myName Keep this a static field, since it's looked at in MemberReference.parse(java.util.StringTokenizer).
private static HashMap<String,ZipFile>	zipFileCache

Constructor Summary

Constructors

Modifier	Constructor and Description
private	BootstrapClassLoader() Prevent other classes from constructing one.

Method Summary

Modifier and Type	Method and Description
static void	boot(String bootstrapClasspath) Initialize for execution.
Class<?>	findClass(String className) Search the bootstrap class loader's classpath for given class.
URL	findResource(String name)
Enumeration<URL>	findResources(String name)
static BootstrapClassLoader	getBootstrapClassLoader()
static String	getBootstrapRepositories()
InputStream	getResourceAsStream(String name)
private <T> T	getResourceInternal(String name, BootstrapClassLoader.Handler<T> h, boolean multiple)
Class<?>	loadClass(String className, boolean resolveClass)
(package private) RVMType	loadVMClass(String className) Backdoor for use by TypeReference.resolve when !
static void	setBootstrapRepositories(String bootstrapClasspath) Set list of places to be searched for VM classes and resources.
String	toString()

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, 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, wait, wait, wait

Field Detail

loaded

private final ImmutableEntryHashMapRVM<String,RVMType> loaded

bootstrapClasspath

private static String bootstrapClasspath

Places whence we load bootstrap .class files.

bootstrapClassLoader

private static final BootstrapClassLoader bootstrapClassLoader

myName

public static final String myName

Keep this a static field, since it's looked at in MemberReference.parse(java.util.StringTokenizer).

See Also:

Constant Field Values

zipFileCache

private static HashMap<String,ZipFile> zipFileCache

Constructor Detail

BootstrapClassLoader

private BootstrapClassLoader()

Prevent other classes from constructing one.

Method Detail

setBootstrapRepositories

public static void setBootstrapRepositories(String bootstrapClasspath)

Set list of places to be searched for VM classes and resources.

Parameters:

bootstrapClasspath - path specification in standard "classpath" format

getBootstrapRepositories

public static String getBootstrapRepositories()

Returns:

List of places to be searched for VM classes and resources, in standard "classpath" format

boot

public static void boot(String bootstrapClasspath)

Initialize for execution.

Parameters:

bootstrapClasspath - names of directories containing the bootstrap .class files, and the names of any .zip/.jar files. These are the ones that implement the VM and its standard runtime libraries. This may contain several names separated with colons (':'), just as a classpath may. (null ==> use the values specified by setBootstrapRepositories(java.lang.String) when the boot image was created. This feature is not actually used, but may be helpful in avoiding trouble.)

getBootstrapClassLoader

public static BootstrapClassLoader getBootstrapClassLoader()

loadVMClass

RVMType loadVMClass(String className)
             throws NoClassDefFoundError

Backdoor for use by TypeReference.resolve when !VM.runningVM. As of this writing, it is not used by any other classes.

Parameters:

className - name of the class to be loaded

Returns:

type for the loaded class

Throws:

NoClassDefFoundError - when no definition of the class was found

loadClass

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

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

findClass

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

Search the bootstrap class loader's classpath for given class.

Overrides:

findClass in class ClassLoader

Parameters:

className - the name of the class to load

Returns:

the class object, if it was found

Throws:

ClassNotFoundException - if the class was not found, or was invalid

toString

public String toString()

Overrides:

toString in class Object

getResourceAsStream

public InputStream getResourceAsStream(String name)

Overrides:

getResourceAsStream in class ClassLoader

findResource

public URL findResource(String name)

Overrides:

findResource in class ClassLoader

findResources

public Enumeration<URL> findResources(String name)

Overrides:

findResources in class ClassLoader

getResourceInternal

private <T> T getResourceInternal(String name,
                                  BootstrapClassLoader.Handler<T> h,
                                  boolean multiple)