Class JasperLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

org.apache.jasper.servlet.JasperLoader

All Implemented Interfaces:

Closeable, AutoCloseable

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).

Field Summary

Fields

Modifier and Type	Field	Description
private Map<String,byte[]>	bytecodes
private CodeSource	codeSource
private ClassLoader	parent
private PermissionCollection	permissionCollection
private SecurityManager	securityManager

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
Class	findClass(String className)
final 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.
private byte[]	loadClassDataFromFile(String fileName)

Methods inherited from class URLClassLoader

addURL, close, definePackage, findResource, findResources, getResourceAsStream, getURLs, newInstance, newInstance

Methods inherited from class SecureClassLoader

defineClass, defineClass

Methods inherited from class ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findSystemClass, getClassLoadingLock, getDefinedPackage, getDefinedPackages, getName, getPackage, getPackages, getParent, getPlatformClassLoader, getResource, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, getUnnamedModule, isRegisteredAsParallelCapable, registerAsParallelCapable, resolveClass, resources, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class Object

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

Field Details

permissionCollection

private PermissionCollection permissionCollection

codeSource

private CodeSource codeSource

parent

private ClassLoader parent

securityManager

private SecurityManager securityManager

bytecodes

private Map<String,byte[]> bytecodes

Constructor Details

JasperLoader

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

Method Details

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

loadClassDataFromFile

private byte[] loadClassDataFromFile(String fileName)

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