6893702: Overhaul of Ftp Client internal code

Summary: Major reorg of internal FTP client code
Reviewed-by: chegar

make/sun/net/FILES_java.gmk

@@ -45,8 +45,14 @@ FILES_java = \
 	sun/net/dns/ResolverConfiguration.java \
 	sun/net/dns/ResolverConfigurationImpl.java \
 	sun/net/ftp/FtpClient.java \
+	sun/net/ftp/FtpClientProvider.java \
+	sun/net/ftp/FtpDirEntry.java \
+	sun/net/ftp/FtpReplyCode.java \
+	sun/net/ftp/FtpDirParser.java \
 	sun/net/ftp/FtpLoginException.java \
 	sun/net/ftp/FtpProtocolException.java \
+	sun/net/ftp/impl/FtpClient.java \
+	sun/net/ftp/impl/DefaultFtpClientProvider.java \
 	sun/net/spi/DefaultProxySelector.java \
 	sun/net/spi/nameservice/NameServiceDescriptor.java \
 	sun/net/spi/nameservice/NameService.java \

src/share/classes/sun/net/ftp/FtpClientProvider.java

+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+package sun.net.ftp;
+
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.ServiceConfigurationError;
+//import sun.misc.Service;
+
+/**
+ * Service provider class for FtpClient.
+ * Sub-classes of FtpClientProvider provide an implementation of {@link FtpClient}
+ * and associated classes. Applications do not normally use this class directly.
+ * See {@link #provider() } for how providers are found and loaded.
+ *
+ * @since 1.7
+ */
+public abstract class FtpClientProvider {
+
+    /**
+     * Creates a FtpClient from this provider.
+     *
+     * @return The created {@link FtpClient}.
+     */
+    public abstract FtpClient createFtpClient();
+    private static final Object lock = new Object();
+    private static FtpClientProvider provider = null;
+
+    /**
+     * Initializes a new instance of this class.
+     *
+     * @throws SecurityException if a security manager is installed and it denies
+     *         {@link RuntimePermission}<tt>("ftpClientProvider")</tt>
+     */
+    protected FtpClientProvider() {
+        SecurityManager sm = System.getSecurityManager();
+        if (sm != null) {
+            sm.checkPermission(new RuntimePermission("ftpClientProvider"));
+        }
+    }
+
+    private static boolean loadProviderFromProperty() {
+        String cm = System.getProperty("sun.net.ftpClientProvider");
+        if (cm == null) {
+            return false;
+        }
+        try {
+            Class c = Class.forName(cm, true, null);
+            provider = (FtpClientProvider) c.newInstance();
+            return true;
+        } catch (ClassNotFoundException x) {
+            throw new ServiceConfigurationError(x.toString());
+        } catch (IllegalAccessException x) {
+            throw new ServiceConfigurationError(x.toString());
+        } catch (InstantiationException x) {
+            throw new ServiceConfigurationError(x.toString());
+        } catch (SecurityException x) {
+            throw new ServiceConfigurationError(x.toString());
+        }
+    }
+
+    private static boolean loadProviderAsService() {
+        //        Iterator i = Service.providers(FtpClientProvider.class,
+        //                ClassLoader.getSystemClassLoader());
+        //        while (i.hasNext()) {
+        //            try {
+        //                provider = (FtpClientProvider) i.next();
+        //                return true;
+        //            } catch (ServiceConfigurationError sce) {
+        //                if (sce.getCause() instanceof SecurityException) {
+        //                    // Ignore, try next provider, if any
+        //                    continue;
+        //                }
+        //                throw sce;
+        //            }
+        //        }
+        return false;
+    }
+
+    /**
+     * Returns the system wide default FtpClientProvider for this invocation of
+     * the Java virtual machine.
+     *
+     * <p> The first invocation of this method locates the default provider
+     * object as follows: </p>
+     *
+     * <ol>
+     *
+     *   <li><p> If the system property
+     *   <tt>java.net.FtpClientProvider</tt> is defined then it is
+     *   taken to be the fully-qualified name of a concrete provider class.
+     *   The class is loaded and instantiated; if this process fails then an
+     *   unspecified unchecked error or exception is thrown.  </p></li>
+     *
+     *   <li><p> If a provider class has been installed in a jar file that is
+     *   visible to the system class loader, and that jar file contains a
+     *   provider-configuration file named
+     *   <tt>java.net.FtpClientProvider</tt> in the resource
+     *   directory <tt>META-INF/services</tt>, then the first class name
+     *   specified in that file is taken.  The class is loaded and
+     *   instantiated; if this process fails then an unspecified unchecked error or exception is
+     *   thrown.  </p></li>
+     *
+     *   <li><p> Finally, if no provider has been specified by any of the above
+     *   means then the system-default provider class is instantiated and the
+     *   result is returned.  </p></li>
+     *
+     * </ol>
+     *
+     * <p> Subsequent invocations of this method return the provider that was
+     * returned by the first invocation.  </p>
+     *
+     * @return  The system-wide default FtpClientProvider
+     */
+    public static FtpClientProvider provider() {
+        synchronized (lock) {
+            if (provider != null) {
+                return provider;
+            }
+            return (FtpClientProvider) AccessController.doPrivileged(
+                    new PrivilegedAction<Object>() {
+
+                        public Object run() {
+                            if (loadProviderFromProperty()) {
+                                return provider;
+                            }
+                            if (loadProviderAsService()) {
+                                return provider;
+                            }
+                            provider = new sun.net.ftp.impl.DefaultFtpClientProvider();
+                            return provider;
+                        }
+                    });
+        }
+    }
+}

src/share/classes/sun/net/ftp/FtpDirEntry.java

+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+package sun.net.ftp;
+
+import java.util.Date;
+import java.util.HashMap;
+
+/**
+ * A {@code FtpDirEntry} is a class agregating all the information that the FTP client
+ * can gather from the server by doing a {@code LST} (or {@code NLST}) command and
+ * parsing the output. It will typically contain the name, type, size, last modification
+ * time, owner and group of the file, although some of these could be unavailable
+ * due to specific FTP server limitations.
+ *
+ * @see sun.net.ftp.FtpDirParser
+ * @since 1.7
+ */
+public class FtpDirEntry {
+
+    public enum Type {
+
+        FILE, DIR, PDIR, CDIR, LINK
+    };
+
+    public enum Permission {
+
+        USER(0), GROUP(1), OTHERS(2);
+        int value;
+
+        Permission(int v) {
+            value = v;
+        }
+    };
+    private final String name;
+    private String user = null;
+    private String group = null;
+    private long size = -1;
+    private java.util.Date created = null;
+    private java.util.Date lastModified = null;
+    private Type type = Type.FILE;
+    private boolean[][] permissions = null;
+    private HashMap<String, String> facts = new HashMap<String, String>();
+
+    private FtpDirEntry() {
+        name = null;
+    }
+
+    /**
+     * Creates an FtpDirEntry instance with only the name being set.
+     *
+     * @param name The name of the file
+     */
+    public FtpDirEntry(String name) {
+        this.name = name;
+    }
+
+    /**
+     * Returns the name of the remote file.
+     *
+     * @return a {@code String} containing the name of the remote file.
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * Returns the user name of the owner of the file as returned by the FTP
+     * server, if provided. This could be a name or a user id (number).
+     *
+     * @return a {@code String} containing the user name or
+     *         {@code null} if that information is not available.
+     */
+    public String getUser() {
+        return user;
+    }
+
+    /**
+     * Sets the user name of the owner of the file. Intended mostly to be
+     * used from inside a {@link java.net.FtpDirParser} implementation.
+     *
+     * @param user The user name of the owner of the file, or {@code null}
+     * if that information is not available.
+     * @return this FtpDirEntry
+     */
+    public FtpDirEntry setUser(String user) {
+        this.user = user;
+        return this;
+    }
+
+    /**
+     * Returns the group name of the file as returned by the FTP
+     * server, if provided. This could be a name or a group id (number).
+     *
+     * @return a {@code String} containing the group name or
+     *         {@code null} if that information is not available.
+     */
+    public String getGroup() {
+        return group;
+    }
+
+    /**
+     * Sets the name of the group to which the file belong. Intended mostly to be
+     * used from inside a {@link java.net.FtpDirParser} implementation.
+     *
+     * @param group The name of the group to which the file belong, or {@code null}
+     * if that information is not available.
+     * @return this FtpDirEntry
+     */
+    public FtpDirEntry setGroup(String group) {
+        this.group = group;
+        return this;
+    }
+
+    /**
+     * Returns the size of the remote file as it was returned by the FTP
+     * server, if provided.
+     *
+     * @return the size of the file or -1 if that information is not available.
+     */
+    public long getSize() {
+        return size;
+    }
+
+    /**
+     * Sets the size of that file. Intended mostly to be used from inside an
+     * {@link java.net.FtpDirParser} implementation.
+     *
+     * @param size The size, in bytes, of that file. or -1 if unknown.
+     * @return this FtpDirEntry
+     */
+    public FtpDirEntry setSize(long size) {
+        this.size = size;
+        return this;
+    }
+
+    /**
+     * Returns the type of the remote file as it was returned by the FTP
+     * server, if provided.
+     * It returns a FtpDirEntry.Type enum and the values can be:
+     * - FtpDirEntry.Type.FILE for a normal file
+     * - FtpDirEntry.Type.DIR for a directory
+     * - FtpDirEntry.Type.LINK for a symbolic link
+     *
+     * @return a {@code FtpDirEntry.Type} describing the type of the file
+     *         or {@code null} if that information is not available.
+     */
+    public Type getType() {
+        return type;
+    }
+
+    /**
+     * Sets the type of the file. Intended mostly to be used from inside an
+     * {@link java.net.FtpDirParser} implementation.
+     *
+     * @param type the type of this file or {@code null} if that information
+     * is not available.
+     * @return this FtpDirEntry
+     */
+    public FtpDirEntry setType(Type type) {
+        this.type = type;
+        return this;
+    }
+
+    /**
+     * Returns the last modification time of the remote file as it was returned
+     * by the FTP server, if provided, {@code null} otherwise.
+     *
+     * @return a <code>Date</code> representing the last time the file was
+     *         modified on the server, or {@code null} if that
+     *         information is not available.
+     */
+    public java.util.Date getLastModified() {
+        return this.lastModified;
+    }
+
+    /**
+     * Sets the last modification time of the file. Intended mostly to be used
+     * from inside an {@link java.net.FtpDirParser} implementation.
+     *
+     * @param lastModified The Date representing the last modification time, or
+     * {@code null} if that information is not available.
+     * @return this FtpDirEntry
+     */
+    public FtpDirEntry setLastModified(Date lastModified) {
+        this.lastModified = lastModified;
+        return this;
+    }
+
+    /**
+     * Returns whether read access is granted for a specific permission.
+     *
+     * @param p the Permission (user, group, others) to check.
+     * @return {@code true} if read access is granted.
+     */
+    public boolean canRead(Permission p) {
+        if (permissions != null) {
+            return permissions[p.value][0];
+        }
+        return false;
+    }
+
+    /**
+     * Returns whether write access is granted for a specific permission.
+     *
+     * @param p the Permission (user, group, others) to check.
+     * @return {@code true} if write access is granted.
+     */
+    public boolean canWrite(Permission p) {
+        if (permissions != null) {
+            return permissions[p.value][1];
+        }
+        return false;
+    }
+
+    /**
+     * Returns whether execute access is granted for a specific permission.
+     *
+     * @param p the Permission (user, group, others) to check.
+     * @return {@code true} if execute access is granted.
+     */
+    public boolean canExexcute(Permission p) {
+        if (permissions != null) {
+            return permissions[p.value][2];
+        }
+        return false;
+    }
+
+    /**
+     * Sets the permissions for that file. Intended mostly to be used
+     * from inside an {@link java.net.FtpDirParser} implementation.
+     * The permissions array is a 3x3 {@code boolean} array, the first index being
+     * the User, group or owner (0, 1 and 2 respectively) while the second
+     * index is read, write or execute (0, 1 and 2 respectively again).
+     * <p>E.G.: {@code permissions[1][2]} is the group/execute permission.</p>
+     *
+     * @param permissions a 3x3 {@code boolean} array
+     * @return this {@code FtpDirEntry}
+     */
+    public FtpDirEntry setPermissions(boolean[][] permissions) {
+        this.permissions = permissions;
+        return this;
+    }
+
+    /**
+     * Adds a 'fact', as defined in RFC 3659, to the list of facts of this file.
+     * Intended mostly to be used from inside a {@link java.net.FtpDirParser}
+     * implementation.
+     *
+     * @param fact the name of the fact (e.g. "Media-Type"). It is not case-sensitive.
+     * @param value the value associated with this fact.
+     * @return this {@code FtpDirEntry}
+     */
+    public FtpDirEntry addFact(String fact, String value) {
+        facts.put(fact.toLowerCase(), value);
+        return this;
+    }
+
+    /**
+     * Returns the requested 'fact', as defined in RFC 3659, if available.
+     *
+     * @param fact The name of the fact *e.g. "Media-Type"). It is not case sensitive.
+     * @return The value of the fact or, {@code null} if that fact wasn't
+     * provided by the server.
+     */
+    public String getFact(String fact) {
+        return facts.get(fact.toLowerCase());
+    }
+
+    /**
+     * Returns the creation time of the file, when provided by the server.
+     *
+     * @return The Date representing the creation time, or {@code null}
+     * if the server didn't provide that information.
+     */
+    public Date getCreated() {
+        return created;
+    }
+
+    /**
+     * Sets the creation time for that file. Intended mostly to be used from
+     * inside a {@link java.net.FtpDirParser} implementation.
+     *
+     * @param created the Date representing the creation time for that file, or
+     * {@code null} if that information is not available.
+     * @return this FtpDirEntry
+     */
+    public FtpDirEntry setCreated(Date created) {
+        this.created = created;
+        return this;
+    }
+
+    /**
+     * Returns a string representation of the object.
+     * The {@code toString} method for class {@code FtpDirEntry}
+     * returns a string consisting of the name of the file, followed by its
+     * type between brackets, followed by the user and group between
+     * parenthesis, then size between '{', and, finally, the lastModified of last
+     * modification if it's available.
+     *
+     * @return  a string representation of the object.
+     */
+    @Override
+    public String toString() {
+        if (lastModified == null) {
+            return name + " [" + type + "] (" + user + " / " + group + ") " + size;
+        }
+        return name + " [" + type + "] (" + user + " / " + group + ") {" + size + "} " + java.text.DateFormat.getDateInstance().format(lastModified);
+    }
+}

src/share/classes/sun/net/ftp/FtpDirParser.java

+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.net.ftp;
+
+/**
+ * This interface describes a parser for the FtpClient class. Such a parser is
+ * used when listing a remote directory to transform text lines like:
+ *      drwxr-xr-x      1 user01      ftp   512 Jan 29 23:32 prog
+ * into FtpDirEntry instances.
+ *
+ * @see java.net.FtpClient#setFileParser(FtpDirParser)
+ * @since 1.7
+ */
+public interface FtpDirParser {
+
+    /**
+     * Takes one line from a directory listing and returns an FtpDirEntry instance
+     * based on the information contained.
+     *
+     * @param line a <code>String</code>, a line sent by the FTP server as a
+     *        result of the LST command.
+     * @return an <code>FtpDirEntry</code> instance.
+     * @see java.net.FtpDirEntry
+     */
+    public FtpDirEntry parseLine(String line);
+}

src/share/classes/sun/net/ftp/FtpLoginException.java

 /*
- * Copyright 1994-2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1994-2009 Sun Microsystems, Inc.  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
@@ -25,7 +25,7 @@
 
 package sun.net.ftp;
 
-import java.io.*;
+import java.io.IOException;
 
 /**
  * This exception is thrown when an error is encountered during an
@@ -33,10 +33,10 @@ import java.io.*;
  *
  * @author      Jonathan Payne
  */
-public class FtpLoginException extends FtpProtocolException {
+public class FtpLoginException extends IOException {
     private static final long serialVersionUID = 2218162403237941536L;
 
-    FtpLoginException(String s) {
+    public FtpLoginException(String s) {
         super(s);
     }
 }

src/share/classes/sun/net/ftp/FtpProtocolException.java

 /*
- * Copyright 1994-2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1994-2009 Sun Microsystems, Inc.  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
@@ -22,21 +22,49 @@
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  */
-
 package sun.net.ftp;
 
-import java.io.*;
-
 /**
- * This exeception is thrown when unexpected results are returned during
- * an FTP session.
- *
+ * Thrown to indicate that the FTP server reported an error.
+ * For instance that the requested file doesn't exist or
+ * that a command isn't supported.
+ * <p>The specific error code can be retreived with {@link #getReplyCode() }.</p>
  * @author      Jonathan Payne
  */
-public class FtpProtocolException extends IOException {
+public class FtpProtocolException extends Exception {
     private static final long serialVersionUID = 5978077070276545054L;
+    private final FtpReplyCode code;
+
+    /**
+     * Constructs a new {@code FtpProtocolException} from the
+     * specified detail message. The reply code is set to unknow error.
+     *
+     * @param   detail   the detail message.
+     */
+    public FtpProtocolException(String detail) {
+            super(detail);
+            code = FtpReplyCode.UNKNOWN_ERROR;
+    }
 
-    FtpProtocolException(String s) {
-        super(s);
+    /**
+     * Constructs a new {@code FtpProtocolException} from the
+     * specified response code and exception detail message
+     *
+     * @param   detail   the detail message.
+     * @param   code The {@code FtpRelyCode} received from server.
+     */
+      public FtpProtocolException(String detail, FtpReplyCode code) {
+        super(detail);
+        this.code = code;
+    }
+
+    /**
+     * Gets the reply code sent by the server that led to this exception
+     * being thrown.
+     *
+     * @return The {@link FtpReplyCode} associated with that exception.
+     */
+    public FtpReplyCode getReplyCode() {
+        return code;
     }
 }

src/share/classes/sun/net/ftp/FtpReplyCode.java

+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+package sun.net.ftp;
+
+/**
+ * This class describes a FTP protocol reply code and associates a meaning
+ * to the numerical value according to the various RFCs (RFC 959 in
+ * particular).
+ *
+ */
+public enum FtpReplyCode {
+
+    RESTART_MARKER(110),
+    SERVICE_READY_IN(120),
+    DATA_CONNECTION_ALREADY_OPEN(125),
+    FILE_STATUS_OK(150),
+    COMMAND_OK(200),
+    NOT_IMPLEMENTED(202),
+    SYSTEM_STATUS(211),
+    DIRECTORY_STATUS(212),
+    FILE_STATUS(213),
+    HELP_MESSAGE(214),
+    NAME_SYSTEM_TYPE(215),
+    SERVICE_READY(220),
+    SERVICE_CLOSING(221),
+    DATA_CONNECTION_OPEN(225),
+    CLOSING_DATA_CONNECTION(226),
+    ENTERING_PASSIVE_MODE(227),
+    ENTERING_EXT_PASSIVE_MODE(229),
+    LOGGED_IN(230),
+    SECURELY_LOGGED_IN(232),
+    SECURITY_EXCHANGE_OK(234),
+    SECURITY_EXCHANGE_COMPLETE(235),
+    FILE_ACTION_OK(250),
+    PATHNAME_CREATED(257),
+    NEED_PASSWORD(331),
+    NEED_ACCOUNT(332),
+    NEED_ADAT(334),
+    NEED_MORE_ADAT(335),
+    FILE_ACTION_PENDING(350),
+    SERVICE_NOT_AVAILABLE(421),
+    CANT_OPEN_DATA_CONNECTION(425),
+    CONNECTION_CLOSED(426),
+    NEED_SECURITY_RESOURCE(431),
+    FILE_ACTION_NOT_TAKEN(450),
+    ACTION_ABORTED(451),
+    INSUFFICIENT_STORAGE(452),
+    COMMAND_UNRECOGNIZED(500),
+    INVALID_PARAMETER(501),
+    BAD_SEQUENCE(503),
+    NOT_IMPLEMENTED_FOR_PARAMETER(504),
+    NOT_LOGGED_IN(530),
+    NEED_ACCOUNT_FOR_STORING(532),
+    PROT_LEVEL_DENIED(533),
+    REQUEST_DENIED(534),
+    FAILED_SECURITY_CHECK(535),
+    UNSUPPORTED_PROT_LEVEL(536),
+    PROT_LEVEL_NOT_SUPPORTED_BY_SECURITY(537),
+    FILE_UNAVAILABLE(550),
+    PAGE_TYPE_UNKNOWN(551),
+    EXCEEDED_STORAGE(552),
+    FILE_NAME_NOT_ALLOWED(553),
+    PROTECTED_REPLY(631),
+    UNKNOWN_ERROR(999);
+    private final int value;
+
+    FtpReplyCode(int val) {
+        this.value = val;
+    }
+
+    /**
+     * Returns the numerical value of the code.
+     *
+     * @return the numerical value.
+     */
+    public int getValue() {
+        return value;
+    }
+
+    /**
+     * Determines if the code is a Positive Preliminary response.
+     * This means beginning with a 1 (which means a value between 100 and 199)
+     *
+     * @return <code>true</code> if the reply code is a positive preliminary
+     *         response.
+     */
+    public boolean isPositivePreliminary() {
+        return value >= 100 && value < 200;
+    }
+
+    /**
+     * Determines if the code is a Positive Completion response.
+     * This means beginning with a 2 (which means a value between 200 and 299)
+     *
+     * @return <code>true</code> if the reply code is a positive completion
+     *         response.
+     */
+    public boolean isPositiveCompletion() {
+        return value >= 200 && value < 300;
+    }
+
+    /**
+     * Determines if the code is a positive internediate response.
+     * This means beginning with a 3 (which means a value between 300 and 399)
+     *
+     * @return <code>true</code> if the reply code is a positive intermediate
+     *         response.
+     */
+    public boolean isPositiveIntermediate() {
+        return value >= 300 && value < 400;
+    }
+
+    /**
+     * Determines if the code is a transient negative response.
+     * This means beginning with a 4 (which means a value between 400 and 499)
+     *
+     * @return <code>true</code> if the reply code is a transient negative
+     *         response.
+     */
+    public boolean isTransientNegative() {
+        return value >= 400 && value < 500;
+    }
+
+    /**
+     * Determines if the code is a permanent negative response.
+     * This means beginning with a 5 (which means a value between 500 and 599)
+     *
+     * @return <code>true</code> if the reply code is a permanent negative
+     *         response.
+     */
+    public boolean isPermanentNegative() {
+        return value >= 500 && value < 600;
+    }
+
+    /**
+     * Determines if the code is a protected reply response.
+     * This means beginning with a 6 (which means a value between 600 and 699)
+     *
+     * @return <code>true</code> if the reply code is a protected reply
+     *         response.
+     */
+    public boolean isProtectedReply() {
+        return value >= 600 && value < 700;
+    }
+
+    /**
+     * Determines if the code is a syntax related response.
+     * This means the second digit is a 0.
+     *
+     * @return <code>true</code> if the reply code is a syntax related
+     *         response.
+     */
+    public boolean isSyntax() {
+        return ((value / 10) - ((value / 100) * 10)) == 0;
+    }
+
+    /**
+     * Determines if the code is an information related response.
+     * This means the second digit is a 1.
+     *
+     * @return <code>true</code> if the reply code is an information related
+     *         response.
+     */
+    public boolean isInformation() {
+        return ((value / 10) - ((value / 100) * 10)) == 1;
+    }
+
+    /**
+     * Determines if the code is a connection related response.
+     * This means the second digit is a 2.
+     *
+     * @return <code>true</code> if the reply code is a connection related
+     *         response.
+     */
+    public boolean isConnection() {
+        return ((value / 10) - ((value / 100) * 10)) == 2;
+    }
+
+    /**
+     * Determines if the code is an authentication related response.
+     * This means the second digit is a 3.
+     *
+     * @return <code>true</code> if the reply code is an authentication related
+     *         response.
+     */
+    public boolean isAuthentication() {
+        return ((value / 10) - ((value / 100) * 10)) == 3;
+    }
+
+    /**
+     * Determines if the code is an unspecified type of response.
+     * This means the second digit is a 4.
+     *
+     * @return <code>true</code> if the reply code is an unspecified type of
+     *         response.
+     */
+    public boolean isUnspecified() {
+        return ((value / 10) - ((value / 100) * 10)) == 4;
+    }
+
+    /**
+     * Determines if the code is a file system related response.
+     * This means the second digit is a 5.
+     *
+     * @return <code>true</code> if the reply code is a file system related
+     *         response.
+     */
+    public boolean isFileSystem() {
+        return ((value / 10) - ((value / 100) * 10)) == 5;
+    }
+
+    /**
+     * Static utility method to convert a value into a FtpReplyCode.
+     *
+     * @param v the value to convert
+     * @return the <code>FtpReplyCode</code> associated with the value.
+     */
+    public static FtpReplyCode find(int v) {
+        for (FtpReplyCode code : FtpReplyCode.values()) {
+            if (code.getValue() == v) {
+                return code;
+            }
+        }
+        return UNKNOWN_ERROR;
+    }
+}

src/share/classes/sun/net/ftp/impl/DefaultFtpClientProvider.java

+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+package sun.net.ftp.impl;
+
+/**
+ * Default FtpClientProvider.
+ * Uses sun.net.ftp.FtpCLient.
+ */
+public class DefaultFtpClientProvider extends sun.net.ftp.FtpClientProvider {
+
+    @Override
+    public sun.net.ftp.FtpClient createFtpClient() {
+        return sun.net.ftp.impl.FtpClient.create();
+    }
+
+}