sysModel
Class MBSClassLoader

java.lang.Object
  java.lang.ClassLoader
      sysModel.MBSClassLoader

public class MBSClassLoader
extends java.lang.ClassLoader

Class loader used for loading fish classes.

Author:

Mathias Ricken

Field Summary

private java.util.ArrayList<java.lang.String>	_buildinClasses List of built-in classes that should not be checked and be loaded with the regular class loader.
(package private) java.util.HashMap<java.lang.String,java.lang.Class<?>>	_classes Classes already loaded.
private java.lang.String	_classPathString String with class path.
private MBSSecurityManager	_securityManager Security manager in use.
private static java.lang.String[]	BUILTIN_CLASSES Array of built-in classes that should not be checked and be loaded with the regular class loader.
private static java.lang.String	JAVA_HOME_STRING String with the Java home directory.
private static java.lang.String	PATH_SEPARATOR_STRING String with path separator character.
private static char	SEPARATOR_CHAR Character with separator character.

Constructor Summary

MBSClassLoader(MBSSecurityManager securityManager)
Create a new class loader.

Method Summary

void	checkClass(java.lang.String name, byte[] classData) Check if the class is safe to load.
private byte[]	loadBytes(java.lang.String name, java.lang.String path) Load byte array from name and path.
java.lang.Class<?>	loadClass(java.lang.String name, boolean resolveIt) Load a class.
private java.lang.Class<?>	loadFromClassPath(java.lang.String name, boolean resolveIt) Load class from class path.
private byte[]	loadFromStream(java.io.InputStream fi) Load byte array from stream.

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, 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

_classes

java.util.HashMap<java.lang.String,java.lang.Class<?>> _classes

Classes already loaded.

_classPathString

private java.lang.String _classPathString

String with class path.

JAVA_HOME_STRING

private static final java.lang.String JAVA_HOME_STRING

String with the Java home directory.

SEPARATOR_CHAR

private static final char SEPARATOR_CHAR

Character with separator character.

PATH_SEPARATOR_STRING

private static final java.lang.String PATH_SEPARATOR_STRING

String with path separator character.

_securityManager

private MBSSecurityManager _securityManager

Security manager in use.

_buildinClasses

private java.util.ArrayList<java.lang.String> _buildinClasses

List of built-in classes that should not be checked and be loaded with the regular class loader.

BUILTIN_CLASSES

private static final java.lang.String[] BUILTIN_CLASSES

Array of built-in classes that should not be checked and be loaded with the regular class loader.

Constructor Detail

MBSClassLoader

public MBSClassLoader(MBSSecurityManager securityManager)

Create a new class loader.

Parameters:

securityManager - security manager that lets us enable and disable security measures

Method Detail

loadClass

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

Load a class.

Overrides:

loadClass in class java.lang.ClassLoader

Parameters:

name - class name

resolveIt - resolve class?

Returns:

class object

Throws:

java.lang.ClassNotFoundException

loadFromClassPath

private java.lang.Class<?> loadFromClassPath(java.lang.String name,
                                             boolean resolveIt)

Load class from class path.

Parameters:

name - class name

resolveIt -

Returns:

loaded class or null if not found

loadBytes

private byte[] loadBytes(java.lang.String name,
                         java.lang.String path)

Load byte array from name and path.

Parameters:

name - class file name (without .class)

path - path to look in (or jar file)

Returns:

byte array

loadFromStream

private byte[] loadFromStream(java.io.InputStream fi)
                       throws java.io.IOException

Load byte array from stream.

Parameters:

fi - input stream

Returns:

byte array

Throws:

java.io.IOException

checkClass

public void checkClass(java.lang.String name,
                       byte[] classData)

Check if the class is safe to load.

Parameters:

name - class name

classData - bytes of the class file