Class IntWme

Java/SMLJava/src/main/java/edu/umich/soar/IntWme.java:12–111

Wrapper for int valued working memory elements. @author voigtjr

 * 
 */
public class IntWme implements Wme
{
    /**
     * Create working memory element instance with no value. The value will be
     * set (and underlying SML Wme created) on first update.
     * 
     * @param parent
     *            Parent identifier
     * @param attr
     *            Attribute
     * @return Wme ready for update
     */
    public static IntWme newInstance(Identifier parent, String attr)
    {
        return new IntWme(parent, attr);
    }

    /**
     * Create working memory element instance with known initial value.
     * 
     * @param parent
     *            Parent identifier
     * @param attr
     *            Attribute
     * @param val
     *            Initial value
     * @return Wme ready for update
     */
    public static IntWme newInstance(Identifier parent, String attr, long val)
    {
        IntWme temp = new IntWme(parent, attr);
        temp.update(val);
        return temp;
    }

    private final Identifier parent;

    private final String attr;

    private IntElement wme;

    private IntWme(Identifier parent, String attr)
    {
        this.parent = parent;
        this.attr = attr;
    }

    /**
     * Update to possibly new value. See Agent.BlinkIfNoChange()
     * 
     * @param val
     *            The new value
     */
    public void update(long val)
    {
        if (wme != null)
            wme.Update(val);
        else