JarURLConnection

Overview

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Class

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Deprecated

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SUMMARY:

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edu.emory.mathcs.util.classloader.jar
Class JarURLConnection

java.lang.Object
  java.net.URLConnection
      java.net.JarURLConnection
          edu.emory.mathcs.util.classloader.jar.JarURLConnection

public class JarURLConnection
extends java.net.JarURLConnection

Alternative implementation of java.net.JarURLConnection which supports customizable JAR caching policies. It addresses bugs 4405789, 4388666, 4639900 in Java Bug Parade. SUN recommends to disable caches completely as a workaround for those bugs; however, this may significantly affect performance in case of resources downloaded from the network. This class is a part of the solution that allows to tailor the caching policy according to the program needs, with cache-per-classloader default policy.

Version:: 1.0

Nested Class Summary

static interface JarURLConnection.JarOpener
          Abstraction of JAR opener which allows to implement various caching policies.

Field Summary

(package private) boolean connected


(package private) java.util.jar.JarEntry jentry


(package private) java.util.jar.JarFile jfile


(package private) JarURLConnection.JarOpener opener


Fields inherited from class java.net.JarURLConnection

jarFileURLConnection

Fields inherited from class java.net.URLConnection

allowUserInteraction, doInput, doOutput, ifModifiedSince, url, useCaches

Constructor Summary

JarURLConnection(java.net.URL url, JarURLConnection.JarOpener opener)
          Creates JarURLConnection for a given URL, using specified JAR opener.

Method Summary

void connect()
          Establishes the actual connection to the URL associated with this connection object

java.io.InputStream getInputStream()
          Returns an InputStream for this connection.

java.util.jar.JarEntry getJarEntry()
          Returns the entry in this jar file specified by the URL.

java.util.jar.JarFile getJarFile()
          Returns a read-only JarFile object for the remote jar file

Methods inherited from class java.net.JarURLConnection

getAttributes, getCertificates, getEntryName, getJarFileURL, getMainAttributes, getManifest

Methods inherited from class java.net.URLConnection

addRequestProperty, getAllowUserInteraction, getContent, getContent, getContentEncoding, getContentLength, getContentType, getDate, getDefaultAllowUserInteraction, getDefaultRequestProperty, getDefaultUseCaches, getDoInput, getDoOutput, getExpiration, getFileNameMap, getHeaderField, getHeaderField, getHeaderFieldDate, getHeaderFieldInt, getHeaderFieldKey, getHeaderFields, getIfModifiedSince, getLastModified, getOutputStream, getPermission, getRequestProperties, getRequestProperty, getURL, getUseCaches, guessContentTypeFromName, guessContentTypeFromStream, setAllowUserInteraction, setContentHandlerFactory, setDefaultAllowUserInteraction, setDefaultRequestProperty, setDefaultUseCaches, setDoInput, setDoOutput, setFileNameMap, setIfModifiedSince, setRequestProperty, setUseCaches, toString

Methods inherited from class java.lang.Object

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

Field Detail

opener

final JarURLConnection.JarOpener opener

connected

boolean connected

jfile

java.util.jar.JarFile jfile

jentry

java.util.jar.JarEntry jentry

Constructor Detail