/** * Licensed under the Artistic License; you may not use this file * except in compliance with the License. * You may obtain a copy of the License at * *      http://displaytag.sourceforge.net/license.html * * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. */package org.displaytag.model;import org.apache.commons.lang.builder.ToStringBuilder;import org.apache.commons.lang.builder.ToStringStyle;import org.displaytag.util.HtmlAttributeMap;/** * <p> * Represents a table cell. * </p> * <p> * A cell is used only when the content is placed as content of the column tag and need to be evaluated during * iteration. * </p> * @author Fabrizio Giustina * @version $Revision: 1094 $ ($Author: rapruitt $) */public class Cell implements Comparable, Cloneable{    /**     * empty cell object. Use as placeholder for empty cell to avoid useless object creation.     */    public static final Cell EMPTY_CELL = new Cell();    /**     * content of the cell.     */    private Object staticValue;    /**     * Per row html attributes (style, class).     */    private HtmlAttributeMap attributes;    /**     * Creates a new empty cell. This should never be done, use EMPTY_CELL instead.     */    private Cell()    {        super();    }    /**     * Creates a cell with a static value.     * @param value Object value of the Cell object     */    public Cell(Object value)    {        this.staticValue = value;    }    /**     * get the static value for the cell.     * @return the Object value of this.staticValue.     */    public Object getStaticValue()    {        return this.staticValue;    }    /**     * Compare the Cell value to another Cell.     * @param obj Object to compare this cell to     * @return int     * @see java.lang.Comparable#compareTo(Object)     */    public int compareTo(Object obj)    {        if (this.staticValue == null)        {            return -1;        }        if (obj instanceof Cell)        {            Object otherStatic = ((Cell) obj).getStaticValue();            if (otherStatic == null)            {                return 1;            }            return ((Comparable) this.staticValue).compareTo(otherStatic);        }        return ((Comparable) this.staticValue).compareTo(obj);    }    /**     * Simple toString wich output the static value.     * @return String represantation of the cell     */    public String toString()    {        return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE) //            .append("staticValue", this.staticValue).toString(); //$NON-NLS-1$    }    public void setPerRowAttributes(HtmlAttributeMap perRowValues)    {        this.attributes = perRowValues;    }    public HtmlAttributeMap getPerRowAttributes()    {        return this.attributes;    }}