swingx-master/swingx-core/src/main/java/org/jdesktop/swingx/renderer/MappedValue.java
/*
 * $Id$
 *
 * Copyright 2008 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
package org.jdesktop.swingx.renderer;

import javax.swing.Icon;

/**
 * Compound implementation of XXValue. Currently, XX stands for String, 
 * Icon, Boolean. <p>
 * 
 * Quick hack around #590-swingx: LabelProvider should respect StringValue
 * when formatting (instead of going clever with icons).
 * 
 * Note: this will change!
 * 
 * @see CheckBoxProvider
 */
public class MappedValue implements StringValue, IconValue, BooleanValue {

    private StringValue stringDelegate;
    private IconValue iconDelegate;
    private BooleanValue booleanDelegate;

    public MappedValue(StringValue stringDelegate, IconValue iconDelegate) {
        this(stringDelegate, iconDelegate, null);
    }
    
    public MappedValue(StringValue stringDelegate, IconValue iconDelegate, 
            BooleanValue booleanDelegate) {
        this.stringDelegate = stringDelegate;
        this.iconDelegate = iconDelegate;
        this.booleanDelegate = booleanDelegate;
    }
    
    /**
     * {@inheritDoc}<p>
     * 
     * This implementation delegates to the contained StringValue if available or
     * returns an empty String, if not.
     *  
     */
    @Override
    public String getString(Object value) {
        if (stringDelegate != null) {
            return stringDelegate.getString(value);
        }
        return "";
    }

    /**
     * {@inheritDoc}<p>
     * 
     * This implementation delegates to the contained IconValue if available or
     * returns null, if not.
     *  
     */
    @Override
    public Icon getIcon(Object value) {
        if (iconDelegate != null) {
            return iconDelegate.getIcon(value);
        }
        return null;
    }
    
    /**
     * {@inheritDoc}<p>
     * 
     * This implementation delegates to the contained BooleanValue if available or
     * returns false, if not.
     *  
     */
    @Override
    public boolean getBoolean(Object value) {
        if (booleanDelegate != null) {
            return booleanDelegate.getBoolean(value);
        }
        return false;
    }
    
}