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+/* TextOutputCallback.java -- callback for text output.
+ Copyright (C) 2003 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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.security.auth.callback;
+
+import java.io.Serializable;
+
+/**
+ * <p>Underlying security services instantiate and pass a
+ * <code>TextOutputCallback</code> to the <code>handle()</code> method of a
+ * {@link CallbackHandler} to display information messages, warning messages and
+ * error messages.</p>
+ *
+ * @see CallbackHandler
+ */
+public class TextOutputCallback implements Callback, Serializable
+{
+
+ // Constants and variables
+ // -------------------------------------------------------------------------
+
+ /** Information message */
+ public static final int INFORMATION = 0;
+
+ /** Warning message */
+ public static final int WARNING = 1;
+
+ /** Error message */
+ public static final int ERROR = 2;
+
+ /**
+ * @serial
+ * @since 1.4
+ */
+ private int messageType;
+
+ /**
+ * @serial
+ * @since 1.4
+ */
+ private String message;
+
+ // Constructor(s)
+ // -------------------------------------------------------------------------
+
+ /**
+ * <p>Construct a <code>TextOutputCallback</code> with a message type and
+ * message to be displayed.</p>
+ *
+ * @param messageType the message type (INFORMATION, WARNING or ERROR).
+ * @param message the message to be displayed.
+ * @throws IllegalArgumentException if <code>messageType</code> is not either
+ * <code>INFORMATION</code>, <code>WARNING</code> or <code>ERROR</code>, if
+ * <code>message</code> is <code>null</code>, or if <code>message</code> has
+ * a length of <code>0</code>.
+ */
+ public TextOutputCallback(int messageType, String message)
+ throws IllegalArgumentException
+ {
+ switch (messageType)
+ {
+ case INFORMATION:
+ case WARNING:
+ case ERROR: this.messageType = messageType; break;
+ default: throw new IllegalArgumentException("invalid message type");
+ }
+
+ setMessage(message);
+ }
+
+ // Class methods
+ // -------------------------------------------------------------------------
+
+ // Instance methods
+ // -------------------------------------------------------------------------
+
+ /**
+ * <p>Returns the message's <code>messageType</code>.</p>
+ *
+ * @return the message type (INFORMATION, WARNING or ERROR).
+ */
+ public int getMessageType()
+ {
+ return messageType;
+ }
+
+ /**
+ * <p>Returns the <code>message</code> to be displayed.</p>
+ *
+ * @return the message to be displayed.
+ */
+ public String getMessage()
+ {
+ return message;
+ }
+
+ private void setMessage(String message) throws IllegalArgumentException
+ {
+ if ((message == null) || (message.length() == 0))
+ {
+ throw new IllegalArgumentException("invalid message");
+ }
+ this.message = message;
+ }
+}