Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

external/ikvm/openjdk/sun/net/dns/ResolverConfigurationImpl.java

@@ -0,0 +1,216 @@
+/*
+ * Copyright (c) 2002, 2010, 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.
+ */
+
+package sun.net.dns;
+
+import java.util.List;
+import java.util.LinkedList;
+import java.util.StringTokenizer;
+import java.io.IOException;
+import cli.System.Net.NetworkInformation.IPAddressCollection;
+import cli.System.Net.NetworkInformation.IPInterfaceProperties;
+import cli.System.Net.NetworkInformation.NetworkInterface;
+
+/*
+ * An implementation of sun.net.ResolverConfiguration for Windows.
+ */
+
+public class ResolverConfigurationImpl
+    extends ResolverConfiguration
+{
+    // Lock helds whilst loading configuration or checking
+    private static Object lock = new Object();
+
+    // Resolver options
+    private final Options opts;
+
+    // Addreses have changed
+    private static boolean changed = false;
+
+    // Time of last refresh.
+    private static long lastRefresh = -1;
+
+    // Cache timeout (120 seconds) - should be converted into property
+    // or configured as preference in the future.
+    private static final int TIMEOUT = 120000;
+
+    // DNS suffix list and name servers populated by native method
+    private static String os_searchlist;
+    private static String os_nameservers;
+
+    // Cached lists
+    private static LinkedList searchlist;
+    private static LinkedList nameservers;
+
+    // Parse string that consists of token delimited by space or commas
+    // and return LinkedHashMap
+    private LinkedList<String> stringToList(String str) {
+        LinkedList<String> ll = new LinkedList<>();
+
+        // comma and space are valid delimites
+        StringTokenizer st = new StringTokenizer(str, ", ");
+        while (st.hasMoreTokens()) {
+            String s = st.nextToken();
+            if (!ll.contains(s)) {
+                ll.add(s);
+            }
+        }
+        return ll;
+    }
+
+    // Load DNS configuration from OS
+
+    private void loadConfig() {
+        assert Thread.holdsLock(lock);
+
+        // if address have changed then DNS probably changed aswell;
+        // otherwise check if cached settings have expired.
+        //
+        if (changed) {
+            changed = false;
+        } else {
+            if (lastRefresh >= 0) {
+                long currTime = System.currentTimeMillis();
+                if ((currTime - lastRefresh) < TIMEOUT) {
+                    return;
+                }
+            }
+        }
+
+        // load DNS configuration, update timestamp, create
+        // new HashMaps from the loaded configuration
+        //
+        loadDNSconfig0();
+
+        lastRefresh = System.currentTimeMillis();
+        searchlist = stringToList(os_searchlist);
+        nameservers = stringToList(os_nameservers);
+        os_searchlist = null;                       // can be GC'ed
+        os_nameservers = null;
+    }
+
+    ResolverConfigurationImpl() {
+        opts = new OptionsImpl();
+    }
+
+    public List<String> searchlist() {
+        synchronized (lock) {
+            loadConfig();
+
+            // List is mutable so return a shallow copy
+            return (List)searchlist.clone();
+        }
+    }
+
+    public List<String> nameservers() {
+        synchronized (lock) {
+            loadConfig();
+
+            // List is mutable so return a shallow copy
+            return (List)nameservers.clone();
+         }
+    }
+
+    public Options options() {
+        return opts;
+    }
+
+    // --- Address Change Listener
+
+    static class AddressChangeListener extends Thread {
+        public void run() {
+            for (;;) {
+                // wait for configuration to change
+                if (notifyAddrChange0() != 0)
+                    return;
+                synchronized (lock) {
+                    changed = true;
+                }
+            }
+        }
+    }
+
+
+    // --- Native methods --
+
+    static void init0() {
+    }
+
+    static void loadDNSconfig0() {
+	String searchlist = "";
+	String nameservers = "";
+	for (NetworkInterface iface : NetworkInterface.GetAllNetworkInterfaces()) {
+	    IPInterfaceProperties props = iface.GetIPProperties();
+	    IPAddressCollection addresses = props.get_DnsAddresses();
+	    for (int i = 0; i < addresses.get_Count(); i++) {
+	        cli.System.Net.IPAddress addr = addresses.get_Item(i);
+	        // no IPv6 support
+	        if (addr.get_AddressFamily().Value == cli.System.Net.Sockets.AddressFamily.InterNetwork) {
+                    nameservers = strAppend(nameservers, addr.toString());
+	        }
+	    }
+	    try {
+	        if (false) throw new cli.System.PlatformNotSupportedException();
+		searchlist = strAppend(searchlist, props.get_DnsSuffix());
+	    }
+	    catch (cli.System.PlatformNotSupportedException _) {
+	    }
+	}
+	os_searchlist = searchlist;
+	os_nameservers = nameservers;
+    }
+    
+    private static String strAppend(String s, String app) {
+        if (s.equals("")) {
+            return app;
+        }
+        if (app.equals("")) {
+            return s;
+        }
+        return s + " " + app;
+    }
+
+    static int notifyAddrChange0() {
+        // TODO we could use System.Net.NetworkInformation.NetworkChange to detect changes
+        return -1;
+    }
+
+    static {
+        java.security.AccessController.doPrivileged(
+            new sun.security.action.LoadLibraryAction("net"));
+        init0();
+
+        // start the address listener thread
+        AddressChangeListener thr = new AddressChangeListener();
+        thr.setDaemon(true);
+        thr.start();
+    }
+}
+
+/**
+ * Implementation of {@link ResolverConfiguration.Options}
+ */
+class OptionsImpl extends ResolverConfiguration.Options {
+}

external/ikvm/openjdk/sun/net/sdp/SdpSupport.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2010, 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.
+ */
+
+package sun.net.sdp;
+
+import java.io.IOException;
+import java.io.FileDescriptor;
+
+
+/**
+ * This class defines methods for creating SDP sockets or "converting" existing
+ * file descriptors, referencing (unbound) TCP sockets, to SDP.
+ */
+
+public final class SdpSupport {
+
+    private SdpSupport() { }
+
+    /**
+     * Creates a SDP socket, returning file descriptor referencing the socket.
+     */
+    public static FileDescriptor createSocket() throws IOException {
+        throw new UnsupportedOperationException("SDP not supported on this platform");
+    }
+
+    /**
+     * Converts an existing file descriptor, that references an unbound TCP socket,
+     * to SDP.
+     */
+    public static void convertSocket(FileDescriptor fd) throws IOException {
+        throw new UnsupportedOperationException("SDP not supported on this platform");
+    }
+}

external/ikvm/openjdk/sun/net/www/protocol/file/FileURLConnection.java

@@ -0,0 +1,238 @@
+/*
+ * Copyright (c) 1995, 2010, 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.
+ */
+
+/**
+ * Open an file input stream given a URL.
+ * @author      James Gosling
+ * @author      Steven B. Byrne
+ */
+
+package sun.net.www.protocol.file;
+
+import java.net.URL;
+import java.net.FileNameMap;
+import java.io.*;
+import java.text.Collator;
+import java.security.Permission;
+import sun.net.*;
+import sun.net.www.*;
+import java.util.*;
+import java.text.SimpleDateFormat;
+
+import sun.security.action.GetPropertyAction;
+import sun.security.action.GetIntegerAction;
+import sun.security.action.GetBooleanAction;
+
+public class FileURLConnection extends URLConnection {
+
+    static String CONTENT_LENGTH = "content-length";
+    static String CONTENT_TYPE = "content-type";
+    static String TEXT_PLAIN = "text/plain";
+    static String LAST_MODIFIED = "last-modified";
+
+    String contentType;
+    InputStream is;
+
+    File file;
+    String filename;
+    boolean isDirectory = false;
+    boolean exists = false;
+    List<String> files;
+
+    long length = -1;
+    long lastModified = 0;
+
+    protected FileURLConnection(URL u, File file) {
+        super(u);
+        this.file = file;
+    }
+
+    /*
+     * Note: the semantics of FileURLConnection object is that the
+     * results of the various URLConnection calls, such as
+     * getContentType, getInputStream or getContentLength reflect
+     * whatever was true when connect was called.
+     */
+    public void connect() throws IOException {
+        if (!connected) {
+            try {
+                filename = file.toString();
+                isDirectory = file.isDirectory();
+                if (isDirectory) {
+                    String[] fileList = file.list();
+                    if (fileList == null)
+                        throw new FileNotFoundException(filename + " exists, but is not accessible");
+                    files = Arrays.<String>asList(fileList);
+                } else {
+
+                    is = new BufferedInputStream(new FileInputStream(filename));
+
+                    // Check if URL should be metered
+                    boolean meteredInput = ProgressMonitor.getDefault().shouldMeterInput(url, "GET");
+                    if (meteredInput)   {
+                        ProgressSource pi = new ProgressSource(url, "GET", file.length());
+                        is = new MeteredStream(is, pi, file.length());
+                    }
+                }
+            } catch (IOException e) {
+                throw e;
+            }
+            connected = true;
+        }
+    }
+
+    private boolean initializedHeaders = false;
+
+    private void initializeHeaders() {
+        try {
+            connect();
+            exists = file.exists();
+        } catch (IOException e) {
+        }
+        if (!initializedHeaders || !exists) {
+            length = file.length();
+            lastModified = file.lastModified();
+
+            if (!isDirectory) {
+                FileNameMap map = java.net.URLConnection.getFileNameMap();
+                contentType = map.getContentTypeFor(filename);
+                if (contentType != null) {
+                    properties.add(CONTENT_TYPE, contentType);
+                }
+                properties.add(CONTENT_LENGTH, String.valueOf(length));
+
+                /*
+                 * Format the last-modified field into the preferred
+                 * Internet standard - ie: fixed-length subset of that
+                 * defined by RFC 1123
+                 */
+                if (lastModified != 0) {
+                    Date date = new Date(lastModified);
+                    SimpleDateFormat fo =
+                        new SimpleDateFormat ("EEE, dd MMM yyyy HH:mm:ss 'GMT'", Locale.US);
+                    fo.setTimeZone(TimeZone.getTimeZone("GMT"));
+                    properties.add(LAST_MODIFIED, fo.format(date));
+                }
+            } else {
+                properties.add(CONTENT_TYPE, TEXT_PLAIN);
+            }
+            initializedHeaders = true;
+        }
+    }
+
+    public String getHeaderField(String name) {
+        initializeHeaders();
+        return super.getHeaderField(name);
+    }
+
+    public String getHeaderField(int n) {
+        initializeHeaders();
+        return super.getHeaderField(n);
+    }
+
+    public int getContentLength() {
+        initializeHeaders();
+        if (length > Integer.MAX_VALUE)
+            return -1;
+        return (int) length;
+    }
+
+    public long getContentLengthLong() {
+        initializeHeaders();
+        return length;
+    }
+
+    public String getHeaderFieldKey(int n) {
+        initializeHeaders();
+        return super.getHeaderFieldKey(n);
+    }
+
+    public MessageHeader getProperties() {
+        initializeHeaders();
+        return super.getProperties();
+    }
+
+    public long getLastModified() {
+        initializeHeaders();
+        return lastModified;
+    }
+
+    public synchronized InputStream getInputStream()
+        throws IOException {
+
+        int iconHeight;
+        int iconWidth;
+
+        connect();
+
+        if (is == null) {
+            if (isDirectory) {
+                FileNameMap map = java.net.URLConnection.getFileNameMap();
+
+                StringBuffer buf = new StringBuffer();
+
+                if (files == null) {
+                    throw new FileNotFoundException(filename);
+                }
+
+                sort(files);
+
+                for (int i = 0 ; i < files.size() ; i++) {
+                    String fileName = files.get(i);
+                    buf.append(fileName);
+                    buf.append("\n");
+                }
+                // Put it into a (default) locale-specific byte-stream.
+                is = new ByteArrayInputStream(buf.toString().getBytes());
+            } else {
+                throw new FileNotFoundException(filename);
+            }
+        }
+        return is;
+    }
+
+    // IKVM specific method (sorting moved here to delay java.text.Collator dependency)
+    private static void sort(List files) {
+        Collections.sort(files, Collator.getInstance());
+    }
+
+    Permission permission;
+
+    /* since getOutputStream isn't supported, only read permission is
+     * relevant
+     */
+    public Permission getPermission() throws IOException {
+        if (permission == null) {
+            String decodedPath = ParseUtil.decode(url.getPath());
+            if (File.separatorChar == '/') {
+                permission = new FilePermission(decodedPath, "read");
+            } else {
+                permission = new FilePermission(
+                        decodedPath.replace('/',File.separatorChar), "read");
+            }
+        }
+        return permission;
+    }
+}

external/ikvm/openjdk/sun/net/www/protocol/file/Handler.java

@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 1999, 2003, 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.
+ */
+
+package sun.net.www.protocol.file;
+
+import java.net.InetAddress;
+import java.net.URLConnection;
+import java.net.URL;
+import java.net.Proxy;
+import java.net.MalformedURLException;
+import java.net.URLStreamHandler;
+import java.io.InputStream;
+import java.io.IOException;
+import sun.net.www.ParseUtil;
+import java.io.File;
+
+/**
+ * Open an file input stream given a URL.
+ * @author      James Gosling
+ */
+public class Handler extends URLStreamHandler {
+
+    private String getHost(URL url) {
+        String host = url.getHost();
+        if (host == null)
+            host = "";
+        return host;
+    }
+
+
+    protected void parseURL(URL u, String spec, int start, int limit) {
+        /*
+         * Ugly backwards compatibility. Flip any file separator
+         * characters to be forward slashes. This is a nop on Unix
+         * and "fixes" win32 file paths. According to RFC 2396,
+         * only forward slashes may be used to represent hierarchy
+         * separation in a URL but previous releases unfortunately
+         * performed this "fixup" behavior in the file URL parsing code
+         * rather than forcing this to be fixed in the caller of the URL
+         * class where it belongs. Since backslash is an "unwise"
+         * character that would normally be encoded if literally intended
+         * as a non-seperator character the damage of veering away from the
+         * specification is presumably limited.
+         */
+        super.parseURL(u, spec.replace(File.separatorChar, '/'), start, limit);
+    }
+
+    public synchronized URLConnection openConnection(URL url)
+        throws IOException {
+        return openConnection(url, null);
+    }
+
+    public synchronized URLConnection openConnection(URL url, Proxy p)
+           throws IOException {
+
+        String path;
+        String file = url.getFile();
+        String host = url.getHost();
+
+        if (ikvm.internal.Util.WINDOWS) {
+            path = ParseUtil.decode(file);
+            path = path.replace('/', '\\');
+            path = path.replace('|', ':');
+        } else {
+            path = ParseUtil.decode(url.getPath());
+        }
+
+        if ((host == null) || host.equals("") ||
+                host.equalsIgnoreCase("localhost") ||
+                host.equals("~")) {
+           return createFileURLConnection(url, new File(path));
+        }
+
+        /*
+         * attempt to treat this as a UNC path. See 4180841
+         */
+        if (ikvm.internal.Util.WINDOWS) {
+            path = "\\\\" + host + path;
+            File f = new File(path);
+            if (f.exists()) {
+                return createFileURLConnection(url, f);
+            }
+        }
+
+        /*
+         * Now attempt an ftp connection.
+         */
+        URLConnection uc;
+        URL newurl;
+
+        try {
+            newurl = new URL("ftp", host, file +
+                            (url.getRef() == null ? "":
+                            "#" + url.getRef()));
+            if (p != null) {
+                uc = newurl.openConnection(p);
+            } else {
+                uc = newurl.openConnection();
+            }
+        } catch (IOException e) {
+            uc = null;
+        }
+        if (uc == null) {
+            throw new IOException("Unable to connect to: " +
+                                        url.toExternalForm());
+        }
+        return uc;
+    }
+
+    /**
+     * Template method to be overriden by Java Plug-in. [stanleyh]
+     */
+    protected URLConnection createFileURLConnection(URL url, File file) {
+        return new FileURLConnection(url, file);
+    }
+
+    /**
+     * Compares the host components of two URLs.
+     * @param u1 the URL of the first host to compare 
+     * @param u2 the URL of the second host to compare 
+     * @return  <tt>true</tt> if and only if they 
+     * are equal, <tt>false</tt> otherwise.
+     */
+    protected boolean hostsEqual(URL u1, URL u2) {
+        /*
+         * Special case for file: URLs
+         * per RFC 1738 no hostname is equivalent to 'localhost'
+         * i.e. file:///path is equal to file://localhost/path
+         */
+        String s1 = u1.getHost();
+        String s2 = u2.getHost();
+        if ("localhost".equalsIgnoreCase(s1) && ( s2 == null || "".equals(s2)))
+            return true;
+        if ("localhost".equalsIgnoreCase(s2) && ( s1 == null || "".equals(s1)))
+            return true;
+        return super.hostsEqual(u1, u2);
+    }
+}

external/ikvm/openjdk/sun/net/www/protocol/ikvmres/Handler.java

@@ -0,0 +1,29 @@
+/*
+  Copyright (C) 2007 Jeroen Frijters
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+
+  Jeroen Frijters
+  jeroen@frijters.net
+  
+*/
+
+package sun.net.www.protocol.ikvmres;
+
+public class Handler extends gnu.java.net.protocol.ikvmres.Handler
+{
+}

external/ikvm/openjdk/sun/net/www/protocol/jar/JarFileFactory.java

@@ -0,0 +1,171 @@
+/*
+ * 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;
+    }
+}