--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/javax/swing/DefaultComboBoxModel.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,191 @@
+/*
+ * Copyright 1998-2004 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.beans.*;
+import java.util.*;
+
+import java.awt.*;
+import java.awt.event.*;
+
+import java.io.Serializable;
+import java.io.ObjectOutputStream;
+import java.io.ObjectInputStream;
+import java.io.IOException;
+
+import javax.swing.event.*;
+import javax.swing.plaf.*;
+import javax.swing.border.*;
+
+import javax.accessibility.*;
+
+/**
+ * The default model for combo boxes.
+ *
+ * @author Arnaud Weber
+ * @author Tom Santos
+ */
+
+public class DefaultComboBoxModel extends AbstractListModel implements MutableComboBoxModel, Serializable {
+    Vector objects;
+    Object selectedObject;
+
+    /**
+     * Constructs an empty DefaultComboBoxModel object.
+     */
+    public DefaultComboBoxModel() {
+        objects = new Vector();
+    }
+
+    /**
+     * Constructs a DefaultComboBoxModel object initialized with
+     * an array of objects.
+     *
+     * @param items  an array of Object objects
+     */
+    public DefaultComboBoxModel(final Object items[]) {
+        objects = new Vector();
+        objects.ensureCapacity( items.length );
+
+        int i,c;
+        for ( i=0,c=items.length;i<c;i++ )
+            objects.addElement(items[i]);
+
+        if ( getSize() > 0 ) {
+            selectedObject = getElementAt( 0 );
+        }
+    }
+
+    /**
+     * Constructs a DefaultComboBoxModel object initialized with
+     * a vector.
+     *
+     * @param v  a Vector object ...
+     */
+    public DefaultComboBoxModel(Vector<?> v) {
+        objects = v;
+
+        if ( getSize() > 0 ) {
+            selectedObject = getElementAt( 0 );
+        }
+    }
+
+    // implements javax.swing.ComboBoxModel
+    /**
+     * Set the value of the selected item. The selected item may be null.
+     * <p>
+     * @param anObject The combo box value or null for no selection.
+     */
+    public void setSelectedItem(Object anObject) {
+        if ((selectedObject != null && !selectedObject.equals( anObject )) ||
+            selectedObject == null && anObject != null) {
+            selectedObject = anObject;
+            fireContentsChanged(this, -1, -1);
+        }
+    }
+
+    // implements javax.swing.ComboBoxModel
+    public Object getSelectedItem() {
+        return selectedObject;
+    }
+
+    // implements javax.swing.ListModel
+    public int getSize() {
+        return objects.size();
+    }
+
+    // implements javax.swing.ListModel
+    public Object getElementAt(int index) {
+        if ( index >= 0 && index < objects.size() )
+            return objects.elementAt(index);
+        else
+            return null;
+    }
+
+    /**
+     * Returns the index-position of the specified object in the list.
+     *
+     * @param anObject
+     * @return an int representing the index position, where 0 is
+     *         the first position
+     */
+    public int getIndexOf(Object anObject) {
+        return objects.indexOf(anObject);
+    }
+
+    // implements javax.swing.MutableComboBoxModel
+    public void addElement(Object anObject) {
+        objects.addElement(anObject);
+        fireIntervalAdded(this,objects.size()-1, objects.size()-1);
+        if ( objects.size() == 1 && selectedObject == null && anObject != null ) {
+            setSelectedItem( anObject );
+        }
+    }
+
+    // implements javax.swing.MutableComboBoxModel
+    public void insertElementAt(Object anObject,int index) {
+        objects.insertElementAt(anObject,index);
+        fireIntervalAdded(this, index, index);
+    }
+
+    // implements javax.swing.MutableComboBoxModel
+    public void removeElementAt(int index) {
+        if ( getElementAt( index ) == selectedObject ) {
+            if ( index == 0 ) {
+                setSelectedItem( getSize() == 1 ? null : getElementAt( index + 1 ) );
+            }
+            else {
+                setSelectedItem( getElementAt( index - 1 ) );
+            }
+        }
+
+        objects.removeElementAt(index);
+
+        fireIntervalRemoved(this, index, index);
+    }
+
+    // implements javax.swing.MutableComboBoxModel
+    public void removeElement(Object anObject) {
+        int index = objects.indexOf(anObject);
+        if ( index != -1 ) {
+            removeElementAt(index);
+        }
+    }
+
+    /**
+     * Empties the list.
+     */
+    public void removeAllElements() {
+        if ( objects.size() > 0 ) {
+            int firstIndex = 0;
+            int lastIndex = objects.size() - 1;
+            objects.removeAllElements();
+            selectedObject = null;
+            fireIntervalRemoved(this, firstIndex, lastIndex);
+        } else {
+            selectedObject = null;
+        }
+    }
+}