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JAXX Runtime api

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/*
 * *##% 
 * JAXX Runtime
 * Copyright (C) 2008 - 2009 CodeLutin
 *
 * This program 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 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Lesser Public License for more details.
 *
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 * ##%*
 */
package jaxx.runtime.swing.renderer;

import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
import java.awt.Component;
import javax.swing.table.DefaultTableCellRenderer;

/**
 * A {@link TableCellRenderer} which does not display numbers when they are
 * equals to 0.
 *
 * @author chemit
 * @since 1.5
 */
public class EmptyNumberTableCellRenderer implements TableCellRenderer {

    protected final Integer ZERO = 0;
    protected final Float ZEROF = 0F;
    protected final Double ZEROD = 0D;
    private TableCellRenderer delegate;

    public EmptyNumberTableCellRenderer() {
        this(new DefaultTableCellRenderer());
    }

    public EmptyNumberTableCellRenderer(TableCellRenderer delegate) {
        this.delegate = delegate;
    }

    @Override
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
        if (value == null || ZERO.equals(value) || ZEROF.equals(value) || ZEROD.equals(value)) {
            value = null;
        }
        return delegate.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
    }
}