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/*
* Copyright (c) 1999, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*IKVM*/
/*
* Modified for IKVM by Jeroen Frijters on May 22, 2007.
*
* This is a merged version of the Windows & Solaris platform specific versions.
* Since the IKVM class library binary can be used both on Windows and on *nix,
* I've merged the platform specific classes into a generic class that at
* runtime determines if it runs on Windows or not.
*
/*IKVM*/
package sun.net.www.protocol.jar;
import java.io.IOException;
import java.io.FileNotFoundException;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;
import java.util.jar.JarFile;
import java.security.Permission;
import sun.net.util.URLUtil;
/* A factory for cached JAR file. This class is used to both retrieve
* and cache Jar files.
*
* @author Benjamin Renaud
* @since JDK1.2
*/
class JarFileFactory implements URLJarFile.URLJarFileCloseController {
/* the url to file cache */
private static HashMap<String, JarFile> fileCache = new HashMap<String, JarFile>();
/* the file to url cache */
private static HashMap<JarFile, URL> urlCache = new HashMap<JarFile, URL>();
URLConnection getConnection(JarFile jarFile) throws IOException {
URL u = urlCache.get(jarFile);
if (u != null)
return u.openConnection();
return null;
}
public JarFile get(URL url) throws IOException {
return get(url, true);
}
JarFile get(URL url, boolean useCaches) throws IOException {
if (ikvm.internal.Util.WINDOWS && url.getProtocol().equalsIgnoreCase("file")) {
// Deal with UNC pathnames specially. See 4180841
String host = url.getHost();
if (host != null && !host.equals("") &&
!host.equalsIgnoreCase("localhost")) {
url = new URL("file", "", "//" + host + url.getPath());
}
}
JarFile result = null;
JarFile local_result = null;
if (useCaches) {
synchronized (this) {
result = getCachedJarFile(url);
}
if (result == null) {
local_result = URLJarFile.getJarFile(url, this);
synchronized (this) {
result = getCachedJarFile(url);
if (result == null) {
fileCache.put(URLUtil.urlNoFragString(url), local_result);
urlCache.put(local_result, url);
result = local_result;
} else {
if (local_result != null) {
local_result.close();
}
}
}
}
} else {
result = URLJarFile.getJarFile(url, this);
}
if (result == null)
throw new FileNotFoundException(url.toString());
return result;
}
/**
* Callback method of the URLJarFileCloseController to
* indicate that the JarFile is close. This way we can
* remove the JarFile from the cache
*/
public void close(JarFile jarFile) {
URL urlRemoved = urlCache.remove(jarFile);
if( urlRemoved != null) {
fileCache.remove(URLUtil.urlNoFragString(urlRemoved));
}
}
private JarFile getCachedJarFile(URL url) {
JarFile result = fileCache.get(URLUtil.urlNoFragString(url));
/* if the JAR file is cached, the permission will always be there */
if (result != null) {
Permission perm = getPermission(result);
if (perm != null) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
try {
sm.checkPermission(perm);
} catch (SecurityException se) {
// fallback to checkRead/checkConnect for pre 1.2
// security managers
if ((perm instanceof java.io.FilePermission) &&
perm.getActions().indexOf("read") != -1) {
sm.checkRead(perm.getName());
} else if ((perm instanceof
java.net.SocketPermission) &&
perm.getActions().indexOf("connect") != -1) {
sm.checkConnect(url.getHost(), url.getPort());
} else {
throw se;
}
}
}
}
}
return result;
}
private Permission getPermission(JarFile jarFile) {
try {
URLConnection uc = (URLConnection)getConnection(jarFile);
if (uc != null)
return uc.getPermission();
} catch (IOException ioe) {
// gulp
}
return null;
}
}
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