This documentation differs from the official API. Jadeite adds extra features to the API including: variable font sizes, constructions examples, placeholders for classes and methods, and auto-generated “See Also” links. Additionally it is missing some items found in standard Javadoc documentation, including: generics type information, “Deprecated” tags and comments, “See Also” links, along with other minor differences. Please send any questions or feedback to bam@cs.cmu.edu.
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java.security
class SecureClassLoader

java.lang.Object extended by java.lang.ClassLoader extended by java.security.SecureClassLoader
Direct Known Subclasses:
URLClassLoader
public class SecureClassLoader
extends ClassLoader

This class extends ClassLoader with additional support for defining classes with an associated code source and permissions which are retrieved by the system policy by default.

Constructor Summary
protected
SecureClassLoader()

          Creates a new SecureClassLoader using the default parent class loader for delegation.
protected
SecureClassLoader(ClassLoader parent)

          Creates a new SecureClassLoader using the specified parent class loader for delegation.
 
Method Summary
protected Class
defineClass(String name, ByteBuffer b, CodeSource cs)

          Converts a java.nio.ByteBuffer into an instance of class Class, with an optional CodeSource.
protected Class
defineClass(String name, byte[] b, int off, int len, CodeSource cs)

          Converts an array of bytes into an instance of class Class, with an optional CodeSource.
protected PermissionCollection
getPermissions(CodeSource codesource)

          Returns the permissions for the given CodeSource object.
 
Methods inherited from class java.lang.ClassLoader
clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResources, findSystemClass, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, loadClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SecureClassLoader

protected SecureClassLoader()
Creates a new SecureClassLoader using the default parent class loader for delegation.

If there is a security manager, this method first calls the security manager's checkCreateClassLoader method to ensure creation of a class loader is allowed.

SecureClassLoader

protected SecureClassLoader(ClassLoader parent)
Creates a new SecureClassLoader using the specified parent class loader for delegation.

If there is a security manager, this method first calls the security manager's checkCreateClassLoader method to ensure creation of a class loader is allowed.

Parameters:
parent - the parent ClassLoader
Method Detail

defineClass

protected final Class defineClass(String name,
                                  ByteBuffer b,
                                  CodeSource cs)
Converts a {@link java.nio.ByteBuffer ByteBuffer} into an instance of class Class, with an optional CodeSource. Before the class can be used it must be resolved.

If a non-null CodeSource is supplied a ProtectionDomain is constructed and associated with the class being defined.

Parameters:
name - the expected name of the class, or null if not known, using '.' and not '/' as the separator and without a trailing ".class" suffix.
b - the bytes that make up the class data. The bytes from positions b.position() through b.position() + b.limit() -1 should have the format of a valid class file as defined by the Java Virtual Machine Specification.
cs - the associated CodeSource, or null if none
Returns:
the Class object created from the data, and optional CodeSource.

defineClass

protected final Class defineClass(String name,
                                  byte[] b,
                                  int off,
                                  int len,
                                  CodeSource cs)
Converts an array of bytes into an instance of class Class, with an optional CodeSource. Before the class can be used it must be resolved.

If a non-null CodeSource is supplied a ProtectionDomain is constructed and associated with the class being defined.

Parameters:
name - the expected name of the class, or null if not known, using '.' and not '/' as the separator and without a trailing ".class" suffix.
b - the bytes that make up the class data. The bytes in positions off through off+len-1 should have the format of a valid class file as defined by the Java Virtual Machine Specification.
off - the start offset in b of the class data
len - the length of the class data
cs - the associated CodeSource, or null if none
Returns:
the Class object created from the data, and optional CodeSource.

getPermissions

protected PermissionCollection getPermissions(CodeSource codesource)
Returns the permissions for the given CodeSource object.

This method is invoked by the defineClass method which takes a CodeSource as an argument when it is constructing the ProtectionDomain for the class being defined.

Parameters:
codesource - the codesource.
Returns:
the permissions granted to the codesource.
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This documentation differs from the official API. Jadeite adds extra features to the API including: variable font sizes, constructions examples, placeholders for classes and methods, and auto-generated “See Also” links. Additionally it is missing some items found in standard Javadoc documentation, including: generics type information, “Deprecated” tags and comments, “See Also” links, along with other minor differences. Please send any questions or feedback to bam@cs.cmu.edu.
This page displays the Jadeite version of the documention, which is derived from the offical documentation that contains this copyright notice:
Copyright 2008 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.
The official Sun™ documentation can be found here at http://java.sun.com/javase/6/docs/api/.