Makefile.am: Add new classes

	* Makefile.am: Add new classes
	(core_java_source_files): CharSequence
	(ordinary_java_source_files): Authenticator, PasswordAuthentication
	* Makefile.in: regenerate
	* gcj/javaprims.h: ditto
	* java/lang/CharSequence: new class from Classpath
	* java/lang/String.java: implements CharSequence
	(subSequence (int,int)): new method
	* java/lang/SubString.java: implements CharSequence
	(subSequence (int,int)): new method
	remerge comments with Classpath
	* java/net/Authenticator.java: new class from Classpath
	* java/net/PasswordAuthentication.java: ditto

From-SVN: r45969

2 files changed, 373 insertions, 0 deletions

diff --git a/libjava/java/net/Authenticator.java b/libjava/java/net/Authenticator.java
new file mode 100644
index 0000000..315bfb0
--- /dev/null
+++ b/libjava/java/net/Authenticator.java
@@ -0,0 +1,269 @@
+/* Authenticator.java -- Abstract class for obtaining authentication info
+   Copyright (C) 1998,2000 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+ 
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+package java.net;
+
+/**
+  * Sometimes a network operation (such as hitting a password protected
+  * web site) will require authentication information in the form of a
+  * username and password.  This abstract class provides a model for 
+  * obtaining that information.
+  * <p>
+  * To make use of this feature, a programmer must create a subclass of
+  * Authenticator that knows how to obtain the necessary info.  An example
+  * would be a class that popped up a dialog box to prompt the user.  
+  * After creating an instance of that subclass, the static setDefault
+  * method of this class is called to set up that instance as the object
+  * to use on subsequent calls to obtain authorization.
+  *
+  * @since 1.2
+  *
+  * @author Aaron M. Renn (arenn@urbanophile.com)
+  */
+public abstract class Authenticator
+{
+
+/*************************************************************************/
+
+/*
+ * Class Variables
+ */
+
+/**
+  * This is the default Authenticator object to use for password requests
+  */
+private static Authenticator default_authenticator;
+
+/*************************************************************************/
+
+/*
+ * Instance Variables
+ */
+
+/**
+  * InternetAddress of the site requesting authentication
+  */
+private InetAddress addr;
+
+/**
+  * The port number of the site requesting authentication
+  */
+private int port;
+
+/**
+  * The protocol name of the site requesting authentication
+  */
+private String protocol;
+
+/**
+  * The prompt to display to the user when requesting authentication info
+  */
+private String prompt;
+
+/**
+  * The authentication scheme in use
+  */
+private String scheme;
+
+/*************************************************************************/
+
+/*
+ * Class Methods
+ */
+
+/**
+  * This method sets the default <code>Authenticator</code> object (an 
+  * instance of a
+  * subclass of <code>Authenticator</code>) to use when prompting the user for
+  * information.  Note that this method checks to see if the caller is
+  * allowed to set this value (the "setDefaultAuthenticator" permission)
+  * and throws a <code>SecurityException</code> if it is not.
+  *
+  * @param def_auth The new default <code>Authenticator</code> object to use
+  *
+  * @exception SecurityException If the caller does not have permission 
+  * to perform this operation
+  */ 
+public static void
+setDefault(Authenticator def_auth)
+{
+  SecurityManager sm = System.getSecurityManager();
+  if (sm != null)
+    sm.checkPermission(new NetPermission("setDefaultAuthenticator"));
+
+  default_authenticator = def_auth;
+} 
+
+/*************************************************************************/
+
+/**
+  * This method is called whenever a username and password for a given
+  * network operation is required.  First, a security check is made to see
+  * if the caller has the "requestPasswordAuthentication"
+  * permission.  If not, the method thows an exception.  If there is no
+  * default <code>Authenticator</code> object, the method then returns 
+  * <code>null</code>.  Otherwise, the default authenticators's instance 
+  * variables are initialized and it's <code>getPasswordAuthentication</code>
+  *  method is called to get the actual authentication information to return.
+  *
+  * @param addr The address requesting authentication
+  * @param port The port requesting authentication
+  * @param protocol The protocol requesting authentication
+  * @param prompt The prompt to display to the user when requesting 
+           authentication info
+  * @param scheme The authentication scheme in use
+  * 
+  * @return A <code>PasswordAuthentication</code> object with the user's 
+  *         authentication info.
+  *
+  * @exception SecurityException If the caller does not have permission to 
+  *         perform this operation
+  */ 
+public static PasswordAuthentication
+requestPasswordAuthentication(InetAddress addr, int port, String protocol,
+                              String prompt, String scheme) 
+{
+  SecurityManager sm = System.getSecurityManager();
+  if (sm != null)
+    sm.checkPermission(new NetPermission("requestPasswordAuthentication"));
+
+  if (default_authenticator == null)
+    return(null);
+
+  default_authenticator.addr = addr;
+  default_authenticator.port = port;
+  default_authenticator.protocol = protocol;
+  default_authenticator.prompt = prompt;
+  default_authenticator.scheme = scheme;
+
+  return(default_authenticator.getPasswordAuthentication());
+}
+
+/*************************************************************************/
+
+/*
+ * Constructors
+ */
+
+/**
+  * Default, no-argument constructor for subclasses to call.
+  */
+public
+Authenticator()
+{
+}
+
+/*************************************************************************/
+
+/*
+ * Instance Methods
+ */
+
+/**
+  * This method returns the address of the site that is requesting
+  * authentication.
+  *
+  * @return The requesting site
+  */
+protected final InetAddress
+getRequestingSite()
+{
+  return(addr);
+}
+
+/*************************************************************************/
+
+/**
+  * This method returns the port of the site that is requesting 
+  * authentication.
+  *
+  * @return The requesting port
+  */
+protected final int
+getRequestingPort()
+{
+  return(port);
+}
+
+/*************************************************************************/
+
+/**
+  * This method returns the requesting protocol of the operation that is
+  * requesting authentication
+  *
+  * @return The requesting protocol
+  */
+protected final String
+getRequestingProtocol()
+{
+  return(protocol);
+}
+
+/*************************************************************************/
+
+/**
+  * Returns the prompt that should be used when requesting authentication 
+  * information from the user
+  * 
+  * @return The user prompt
+  */
+protected final String
+getRequestingPrompt()
+{
+  return(prompt);
+}
+
+/*************************************************************************/
+
+/**
+  * This method returns the authentication scheme in use
+  *
+  * @return The authentication scheme
+  */
+protected final String
+getRequestingScheme()
+{
+  return(scheme);
+}
+
+/*************************************************************************/
+
+/**
+  * This method is called whenever a request for authentication is made.  It
+  * can call the other getXXX methods to determine the information relevant
+  * to this request.  Subclasses should override this method, which returns
+  * <code>null</code> by default.
+  *
+  * @return The PasswordAuthentication information
+  */
+protected PasswordAuthentication
+getPasswordAuthentication()
+{
+  return(null);
+}
+
+} // class Authenticator
+
diff --git a/libjava/java/net/PasswordAuthentication.java b/libjava/java/net/PasswordAuthentication.java
new file mode 100644
index 0000000..08ef6fa
--- /dev/null
+++ b/libjava/java/net/PasswordAuthentication.java
@@ -0,0 +1,104 @@
+/* PasswordAuthentication.java -- Container class for username/password pairs
+   Copyright (C) 1998,2000 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+ 
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+package java.net;
+
+/**
+  * This class serves a container for username/password pairs.
+  *
+  * @author Aaron M. Renn (arenn@urbanophile.com)
+  */
+public final class PasswordAuthentication
+{
+
+/*************************************************************************/
+
+/*
+ * Instance Variables
+ */
+
+/**
+  * The username 
+  */
+private String username;
+
+/**
+  * The password
+  */
+private char[] password;
+
+/*************************************************************************/
+
+/*
+ * Constructors
+ */
+
+/**
+  * Creates a new PasswordAuthentication object from the specified username
+  * and password.
+  *
+  * @param username The username for this object
+  * @param password The password for this object
+  */
+public
+PasswordAuthentication(String username, char[] password)
+{
+  this.username = username;
+  this.password = password;
+}
+
+/*************************************************************************/
+
+/*
+ * Instance Methods
+ */
+
+/**
+  * Returns the username associated with this object
+  *
+  * @return The username
+  */
+public String
+getUserName()
+{
+  return(username);
+}
+ 
+/*************************************************************************/
+
+/**
+  * Returns the password associated with this object
+  *
+  * @return The password
+  */
+public char[]
+getPassword()
+{
+  return(password);
+}
+
+} // class PasswordAuthentication
+