Package org.springframework.boot.loader.net.protocol.jar

Class JarUrlClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

org.springframework.boot.loader.net.protocol.jar.JarUrlClassLoader

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

LaunchedClassLoader

public abstract class JarUrlClassLoader
extends URLClassLoader

URLClassLoader with optimized support for Jar URLs.

Since:

3.2.0

Author:

Phillip Webb, Andy Wilkinson

Constructor Summary

Constructors

Constructor	Description
JarUrlClassLoader(URL[] urls, ClassLoader parent)	Create a new LaunchedClassLoader instance.

Method Summary

Modifier and Type	Method	Description
void	clearCache()	Clear any caches.
void	close()
protected final void	definePackageIfNecessary(String className)	Define a package before a findClass call is made.
URL	findResource(String name)
Enumeration<URL>	findResources(String name)
protected Class<?>	loadClass(String name, boolean resolve)

Methods inherited from class java.net.URLClassLoader

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

Methods inherited from class java.lang.Object

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

Constructor Details

JarUrlClassLoader

public JarUrlClassLoader(URL[] urls,
 ClassLoader parent)

Create a new LaunchedClassLoader instance.

Parameters:

urls - the URLs from which to load classes and resources

parent - the parent class loader for delegation

Method Details

findResource

public URL findResource(String name)

Overrides:

findResource in class URLClassLoader

findResources

public Enumeration<URL> findResources(String name)
                               throws IOException

Overrides:

findResources in class URLClassLoader

Throws:

IOException

loadClass

protected Class<?> loadClass(String name,
 boolean resolve)
                      throws ClassNotFoundException

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

definePackageIfNecessary

protected final void definePackageIfNecessary(String className)

Define a package before a findClass call is made. This is necessary to ensure that the appropriate manifest for nested JARs is associated with the package.

Parameters:

className - the class name being found

clearCache

public void clearCache()

Clear any caches. This method is called reflectively by ClearCachesApplicationListener.

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class URLClassLoader

Throws:

IOException