org.apache.jasper.servlet
Class JasperLoader

java.lang.Object
  |
  +--java.lang.ClassLoader
        |
        +--java.security.SecureClassLoader
              |
              +--java.net.URLClassLoader
                    |
                    +--org.apache.jasper.servlet.JasperLoader

public class JasperLoader

extends java.net.URLClassLoader

This is a class loader that loads JSP files as though they were Java classes. It calls the compiler to compile the JSP file into a servlet and then loads the generated class.

Author:

Anil K. Vijendran, Harish Prabandham

Inner Class Summary

protected class

JasperLoader.PrivilegedLoadClass

Constructor Summary

JasperLoader(java.net.URL[] urls, java.lang.String className, java.lang.ClassLoader parent, java.security.PermissionCollection permissionCollection, java.security.CodeSource codeSource)

Method Summary

protected java.security.PermissionCollection	getPermissions(java.security.CodeSource codeSource) Get the Permissions for a CodeSource.
java.lang.Class	loadClass(java.lang.String name) Load the class with the specified name.
java.lang.Class	loadClass(java.lang.String name, boolean resolve) Load the class with the specified name, searching using the following algorithm until it finds and returns the class.
protected byte[]	loadClassDataFromFile(java.lang.String fileName) Load JSP class data from file.

Methods inherited from class java.net.URLClassLoader

addURL, definePackage, findClass, findResource, findResources, getURLs, newInstance, newInstance

Methods inherited from class java.security.SecureClassLoader

defineClass

Methods inherited from class java.lang.ClassLoader

defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findSystemClass, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, resolveClass, setSigners

Methods inherited from class java.lang.Object

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

Constructor Detail

JasperLoader

public JasperLoader(java.net.URL[] urls,
                    java.lang.String className,
                    java.lang.ClassLoader parent,
                    java.security.PermissionCollection permissionCollection,
                    java.security.CodeSource codeSource)

Method Detail

loadClass

public java.lang.Class loadClass(java.lang.String name)
                          throws java.lang.ClassNotFoundException

Load the class with the specified name. This method searches for classes in the same manner as loadClass(String, boolean) with false as the second argument.

Overrides:

loadClass in class java.lang.ClassLoader

Parameters:

name - Name of the class to be loaded

Throws:

java.lang.ClassNotFoundException - if the class was not found

loadClass

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

Load the class with the specified name, searching using the following algorithm until it finds and returns the class. If the class cannot be found, returns ClassNotFoundException.

• Call findLoadedClass(String) to check if the class has already been loaded. If it has, the same Class object is returned.
• If the delegate property is set to true, call the loadClass() method of the parent class loader, if any.
• Call findClass() to find this class in our locally defined repositories.
• Call the loadClass() method of our parent class loader, if any.

If the class was found using the above steps, and the resolve flag is true, this method will then call resolveClass(Class) on the resulting Class object.

Overrides:

loadClass in class java.lang.ClassLoader

Parameters:

name - Name of the class to be loaded

resolve - If true then resolve the class

Throws:

java.lang.ClassNotFoundException - if the class was not found

getPermissions

protected final java.security.PermissionCollection getPermissions(java.security.CodeSource codeSource)

Get the Permissions for a CodeSource. Since this ClassLoader is only used for a JSP page in a web application context, we just return our preset PermissionCollection for the web app context.

Overrides:

getPermissions in class java.net.URLClassLoader

Parameters:

CodeSource - where the code was loaded from

Returns:

PermissionCollection for CodeSource

loadClassDataFromFile

protected byte[] loadClassDataFromFile(java.lang.String fileName)

Load JSP class data from file.