package org.apidesign.javamonitorflaws;

import org.apidesign.javamonitorflaws.Cache;

import java.beans.PropertyChangeListener;

import java.beans.PropertyChangeSupport;

/**

 *

 * @author Jaroslav Tulach <jtulach@netbeans.org>

 */

// BEGIN: monitor.pitfalls.subclass

public class MultiplyCache extends Cache<String,Integer> {

    private PropertyChangeSupport pcs;

    private int multiply;

    public static final String PROP_MULTIPLY = "multiply";

    public synchronized int getMultiply() {

        return multiply;

    }

    public synchronized void setMultiply(int multiply) {

        int oldMultiply = this.multiply;

        this.multiply = multiply;

        pcs.firePropertyChange(PROP_MULTIPLY, oldMultiply, multiply);

    }

    public synchronized void addPropertyChangeListener(PropertyChangeListener listener) {

        if (pcs == null) {

            pcs = new PropertyChangeSupport(this);

        }

        pcs.addPropertyChangeListener(listener);

    }

    public synchronized void removePropertyChangeListener(PropertyChangeListener listener) {

        if (pcs != null) {

            pcs.removePropertyChangeListener(listener);

        }

    }

    @Override

    protected Integer createItem(String f) {

        return f.length() * getMultiply();

    }

}

// END: monitor.pitfalls.subclass