## 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 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, Kin-man Chung

Constructor Summary
`JasperLoader(URL[] urls, ClassLoader parent, PermissionCollection permissionCollection, CodeSource codeSource, Map<String,byte[]> bytecodes)`

Method Summary
`Class` `findClass(String className)`
`PermissionCollection` `getPermissions(CodeSource codeSource)` Get the Permissions for a CodeSource.
`Class` `loadClass(String name)` Load the class with the specified name.
`Class` `loadClass(String name, boolean resolve)` Load the class with the specified name, searching using the following algorithm until it finds and returns the class.

Methods inherited from class java.net.URLClassLoader
`addURL, definePackage, findResource, findResources, getURLs, newInstance, newInstance`

Methods inherited from class java.security.SecureClassLoader
`defineClass, defineClass`

Methods inherited from class java.lang.ClassLoader

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

### JasperLoader

    public JasperLoader(URL[] urls,
                        ClassLoader parent,
                        PermissionCollection permissionCollection,
                        CodeSource codeSource,
                        Map<String,byte[]> bytecodes)

Method Detail

### loadClass

    public Class loadClass(String name)
                    throws 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 `ClassLoader`
  Parameters:
    `name` - Name of the class to be loaded
  Throws:
    `ClassNotFoundException` - if the class was not found

### loadClass

    public Class loadClass(String name,
                           boolean resolve)
                    throws 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 `ClassLoader`
  Parameters:
    `name` - Name of the class to be loaded
    `resolve` - If `true` then resolve the class
  Throws:
    `ClassNotFoundException` - if the class was not found

### findClass

    public Class findClass(String className)
                    throws ClassNotFoundException

  Overrides:
    `findClass` in class `URLClassLoader`
  Throws:
    `ClassNotFoundException`

### getPermissions

    public final PermissionCollection getPermissions(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 `URLClassLoader`
  Parameters:
    `codeSource` - Code source where the code was loaded from
  Returns:
    PermissionCollection for CodeSource

Copyright © 2007 Mort Bay Consulting. All Rights Reserved.