package com.waldura;

/**
 * Enumeration class for the state of a checkbox.
 * 
 * @author Renaud Waldura <renaud+java@waldura.com>
 */

public final class CheckboxState
{    
    private static final String SELECTED_STRING = "selected";
    private static final String UNSELECTED_STRING = "unselected";
    private static final String THIRD_STATE_STRING = "third state";
    
    public static final CheckboxState SELECTED = new CheckboxState(SELECTED_STRING);
    public static final CheckboxState UNSELECTED = new CheckboxState(UNSELECTED_STRING);
    public static final CheckboxState THIRD_STATE = new CheckboxState(THIRD_STATE_STRING);
    
	private final String name;
	
	private CheckboxState(String name)
	{
		this.name = name;	
	}
	
	public String toString() 
	{
	    return name;	
	}
    
    public CheckboxState valueOf(String state)
    {
        if (state == null) 
            return null;
        
        if (state.equals(SELECTED_STRING))
            return SELECTED;
        
        if (state.equals(UNSELECTED_STRING))
            return UNSELECTED;
            
        if (state.equals(THIRD_STATE_STRING))
            return THIRD_STATE;

        return null;
    }
}