NonCachingComboBoxModel.java

/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.uitools.swing;

import javax.swing.ComboBoxModel;
import javax.swing.event.ListDataListener;

/**
 * This implementation of the CachingComboBoxModel interface can be used
 * whenever there is no need for caching (i.e. the contents of the selection
 * list can be generated with little latency). All the normal ComboBoxModel
 * behavior is delegated to a client-supplied ComboBoxModel.
 */
public class NonCachingComboBoxModel implements CachingComboBoxModel {
    private ComboBoxModel wrappedComboBoxModel;

    public NonCachingComboBoxModel(ComboBoxModel wrappedComboBoxModel) {
        this.wrappedComboBoxModel = wrappedComboBoxModel;
    }


    // ********** CachingComboBoxModel implementation **********

    public void cacheList() {
        //do nothing
    }

    public void uncacheList() {
        //do nothing
    }

    public boolean isCached() {
        return false;
    }


    // ********** ComboBoxModel implementation **********

    public void setSelectedItem(Object anItem) {
        this.wrappedComboBoxModel.setSelectedItem(anItem);
    }

    public Object getSelectedItem() {
        return this.wrappedComboBoxModel.getSelectedItem();
    }


    // ********** ListModel implementation **********

    public int getSize() {
        return this.wrappedComboBoxModel.getSize();
    }

    public Object getElementAt(int index) {
        return this.wrappedComboBoxModel.getElementAt(index);
    }

    public void addListDataListener(ListDataListener l) {
        this.wrappedComboBoxModel.addListDataListener(l);
    }

    public void removeListDataListener(ListDataListener l) {
        this.wrappedComboBoxModel.removeListDataListener(l);
    }

}