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Class com.sun.wizards.builder.ArchiveClassLoader

java.lang.Object
   |
   +----java.lang.ClassLoader
           |
           +----com.sun.wizards.builder.ArchiveClassLoader

public final class ArchiveClassLoader

extends ClassLoader

This class file is meant to be the head of the wizard archive. The wizard archive will contain classes that comprise the wizard runtime classes and images as well as initialization data for the wizard.

Classes are submitted to this class loader from the ArchiveReader.

This class cannot be subclassed.

CONSTANT_Class

The tag value for a class or an interface.

CONSTANT_Double

The tag value for a constant double.

CONSTANT_Fieldref

The tag value for a class field.

CONSTANT_Float

The tag value for a constant float.

CONSTANT_Integer

The tag value for a constant integer.

CONSTANT_InterfaceMethodref

The tag value for an interface method.

CONSTANT_Long

The tag value for a constant long.

CONSTANT_Methodref

The tag value for a class method.

CONSTANT_NameAndType

The tag value for a field or method that does not indicate affiliation with a specific class or interface.

CONSTANT_String

The tag value for a java.lang.String object.

CONSTANT_Utf8

The tag value for a constant string.

ArchiveClassLoader()

Creates an ArchiveClassLoader object.

exit(int)

Exits the server virtual machine with the specified exit code.

getAttributeOffset(RandomAccessFile, String)

This method returns the offset within the class bytes where the specified attribute can be found.

getClassBytes(String)

Retrieves the byte[] representation of the named class

getSectionInputStream(FileInputStream)

This method returns an input stream for a section in the wizard archive.

isClassRegistered(String)

Find out if the specified class is already registered with this class loader.

loadClass(String, boolean)

loadClass fulfills the responsibility of a subclass of ClassLoader.

main(String[])

The main method facilitates running this class as an application.

registerClass(String, byte[])

Register the specified class with the class loader.

 public static final byte CONSTANT_Utf8

The tag value for a constant string.

 public static final byte CONSTANT_Integer

The tag value for a constant integer.

 public static final byte CONSTANT_Float

The tag value for a constant float.

 public static final byte CONSTANT_Long

The tag value for a constant long.

 public static final byte CONSTANT_Double

The tag value for a constant double.

 public static final byte CONSTANT_Class

The tag value for a class or an interface.

 public static final byte CONSTANT_String

The tag value for a java.lang.String object.

 public static final byte CONSTANT_Fieldref

The tag value for a class field.

 public static final byte CONSTANT_Methodref

The tag value for a class method.

 public static final byte CONSTANT_InterfaceMethodref

The tag value for an interface method.

 public static final byte CONSTANT_NameAndType

The tag value for a field or method that does not indicate affiliation with a specific class or interface.

 public ArchiveClassLoader()

Creates an ArchiveClassLoader object. This constructor can only be called on an archive. An archive is a copy of the ArchiveClassLoader class bytes with an attribute appended that contains class bytes and initialization data. The attribute gets appended by running a wizard builder, subclassed from ArchiveWriter.

See Also:

writeArchive

 public DataInput getSectionInputStream(FileInputStream file)

This method returns an input stream for a section in the wizard archive. This method will determine from the archive section if compression is being used, and return an appropriate input stream.

Parameters:

file - The file, correctly positioned to read the desired archive section.

Returns:

An input stream that can read the archive section.

 public synchronized Boolean isClassRegistered(String classname)

Find out if the specified class is already registered with this class loader.

Parameters:

classname - The fully qualified name of the class.

Returns:

true if the class is already registered. false if the class has not been registered.

 public synchronized void registerClass(String classname,
                                        byte classBytes[])

Register the specified class with the class loader. This must be done for all of the classes that originate within the archive.

Parameters:

classname - The fully qualified name of the class to register.

classBytes - The bytes representing the specified class.

 public synchronized Class loadClass(String name,
                                     boolean resolve)

loadClass fulfills the responsibility of a subclass of ClassLoader. This method will load classes either from the system or from the hashtables within this class.

Parameters:

name - The name of the desired Class.

resolve - true if the Class needs to be resolved.

Returns:

the resulting Class, or null if it was not found.

Overrides:

loadClass in class ClassLoader

 public synchronized byte[] getClassBytes(String name)

Retrieves the byte[] representation of the named class

Parameters:

name - The fully qualified name of the class to retrieve

Returns:

The bytes representing the named class

 public static void main(String args[])

The main method facilitates running this class as an application. This is the entry point into the wizard.

 public void exit(int exitStatus)

Exits the server virtual machine with the specified exit code.

Parameters:

exitStatus - The exit code.

 public static long getAttributeOffset(RandomAccessFile in,
                                       String attributeName)

This method returns the offset within the class bytes where the specified attribute can be found.

Parameters:

in - The input file from which the class bytes can be found.

attributeName - The name of the class attribute to locate.

Returns:

The offset of the specified attribute.

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