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

Class loader for loading servlet class files (corresponding to JSP files) and tag handler class files (corresponding to tag files).

Author:

Anil K. Vijendran, Harish Prabandham, Jean-Francois Arcand

JasperLoader

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

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

getResourceAsStream

public java.io.InputStream getResourceAsStream(java.lang.String name)

Delegate to parent

Overrides:

getResourceAsStream in class java.lang.ClassLoader

See Also:

ClassLoader.getResourceAsStream(java.lang.String)

getPermissions

public 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 - Code source where the code was loaded from

Returns:

PermissionCollection for CodeSource