--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/javax/swing/SpinnerModel.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,139 @@
+/*
+ * Copyright 2000-2002 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 javax.swing;
+
+import java.awt.event.*;
+import javax.swing.event.*;
+
+
+/**
+ * A model for a potentially unbounded sequence of object values.  This model
+ * is similar to <code>ListModel</code> however there are some important differences:
+ * <ul>
+ * <li> The number of sequence elements isn't neccessarily bounded.
+ * <li> The model doesn't support indexed random access to sequence elements.
+ *      Only three sequence values are accessible at a time: current, next and
+ *      previous.
+ * <li> The current sequence element, can be set.
+ * </ul>
+ * <p>
+ * A <code>SpinnerModel</code> has three properties, only the first is read/write.
+ * <dl>
+ *   <dt><code>value</code>
+ *   <dd>The current element of the sequence.
+ *
+ *   <dt><code>nextValue</code>
+ *   <dd>The following element or null if <code>value</code> is the
+ *     last element of the sequence.
+ *
+ *   <dt><code>previousValue</code>
+ *   <dd>The preceeding element or null if <code>value</code> is the
+ *     first element of the sequence.
+ * </dl>
+ * When the the <code>value</code> property changes,
+ * <code>ChangeListeners</code> are notified.  <code>SpinnerModel</code> may
+ * choose to notify the <code>ChangeListeners</code> under other circumstances.
+ *
+ * @see JSpinner
+ * @see AbstractSpinnerModel
+ * @see SpinnerListModel
+ * @see SpinnerNumberModel
+ * @see SpinnerDateModel
+ *
+ * @author Hans Muller
+ * @since 1.4
+ */
+public interface SpinnerModel
+{
+    /**
+     * The <i>current element</i> of the sequence.  This element is usually
+     * displayed by the <code>editor</code> part of a <code>JSpinner</code>.
+     *
+     * @return the current spinner value.
+     * @see #setValue
+     */
+    Object getValue();
+
+
+    /**
+     * Changes current value of the model, typically this value is displayed
+     * by the <code>editor</code> part of a  <code>JSpinner</code>.
+     * If the <code>SpinnerModel</code> implementation doesn't support
+     * the specified value then an <code>IllegalArgumentException</code>
+     * is thrown.  For example a <code>SpinnerModel</code> for numbers might
+     * only support values that are integer multiples of ten. In
+     * that case, <code>model.setValue(new Number(11))</code>
+     * would throw an exception.
+     *
+     * @throws IllegalArgumentException if <code>value</code> isn't allowed
+     * @see #getValue
+     */
+    void setValue(Object value);
+
+
+    /**
+     * Return the object in the sequence that comes after the object returned
+     * by <code>getValue()</code>. If the end of the sequence has been reached
+     * then return null.  Calling this method does not effect <code>value</code>.
+     *
+     * @return the next legal value or null if one doesn't exist
+     * @see #getValue
+     * @see #getPreviousValue
+     */
+    Object getNextValue();
+
+
+    /**
+     * Return the object in the sequence that comes before the object returned
+     * by <code>getValue()</code>.  If the end of the sequence has been reached then
+     * return null. Calling this method does not effect <code>value</code>.
+     *
+     * @return the previous legal value or null if one doesn't exist
+     * @see #getValue
+     * @see #getNextValue
+     */
+    Object getPreviousValue();
+
+
+    /**
+     * Adds a <code>ChangeListener</code> to the model's listener list.  The
+     * <code>ChangeListeners</code> must be notified when models <code>value</code>
+     * changes.
+     *
+     * @param l the ChangeListener to add
+     * @see #removeChangeListener
+     */
+    void addChangeListener(ChangeListener l);
+
+
+    /**
+     * Removes a <code>ChangeListener</code> from the model's listener list.
+     *
+     * @param l the ChangeListener to remove
+     * @see #addChangeListener
+     */
+    void removeChangeListener(ChangeListener l);
+}