```
public final class CachedJarFileCallback
extends java.lang.Object
```
Invoked by URLJarFile to get a JarFile corresponding to a URL. Large parts of this class are based on JarFileFactory and URLJarFile. Hooked in reflectively: sun.net.www.protocol.jar.URLJarFileCallBack is gone in newer JDKs.

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addMapping(java.net.URL remoteUrl, java.net.URL localUrl)`
`private java.util.jar.JarFile`	`cacheJarFile(java.net.URL url)`
`static CachedJarFileCallback`	`getInstance()`
`static void`	`register()`	Registers this as URLJarFile callback.
`java.util.jar.JarFile`	`retrieve(java.net.URL url)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

private static final CachedJarFileCallback INSTANCE

private final java.util.Map<UrlKey,java.net.URL> mapping

Constructor Detail
- CachedJarFileCallback
```
private CachedJarFileCallback()
```

public static CachedJarFileCallback getInstance()

public void addMapping(java.net.URL remoteUrl,
                       java.net.URL localUrl)

register
```
public static void register()
```
Registers this as URLJarFile callback. No-op on JDKs without URLJarFileCallBack; remote jar: URLs are then fetched by the JDK itself, bypassing the ITW cache.

public java.util.jar.JarFile retrieve(java.net.URL url)
                               throws java.io.IOException

private java.util.jar.JarFile cacheJarFile(java.net.URL url)
                                    throws java.io.IOException

Modifier and Type	Field	Description
`private static CachedJarFileCallback`	`INSTANCE`
`private static Logger`	`LOG`
`private java.util.Map<UrlKey,java.net.URL>`	`mapping`

Class CachedJarFileCallback