verdandi.model.CurrentWeekModel.java Source code

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Here is the source code for verdandi.model.CurrentWeekModel.java

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/*******************************************************************************
 * Copyright 2010 Olaf Sebelin
 * 
 * This file is part of Verdandi.
 * 
 * Verdandi is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Verdandi 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 Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Verdandi.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
/*
 * Created on 01.10.2005
 * Author: osebelin
 *
 */
package verdandi.model;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * The model of the current week. needed in week view like in summary.
 * 
 */
public class CurrentWeekModel {

    private Calendar cal;

    private List<CurrentWeekListener> listeners;

    private static final Log LOG = LogFactory.getLog(CurrentWeekModel.class);

    public CurrentWeekModel() {
        super();
        cal = Calendar.getInstance();
        listeners = new ArrayList<CurrentWeekListener>();
    }

    /**
     * @param listener
     * @return
     */
    public boolean addCurrentWeekListener(CurrentWeekListener listener) {
        return listeners.add(listener);
    }

    /**
     * @param listener
     * @return
     */
    public boolean removeCurrentWeekListener(CurrentWeekListener listener) {
        return listeners.remove(listener);
    }

    /**
     * Notify listeners;
     */
    public void fireCurrentWeekChanged() {
        Calendar newWeek = (Calendar) cal.clone();
        for (CurrentWeekListener listener : listeners) {
            listener.currentWeekChanged(newWeek);
        }
    }

    /**
     * @param week
     */
    @Deprecated
    public void setCurrentWeek(int week) {
        LOG.debug("Setting current week to " + week);
        if (week > 52) {
            week = week % 52;
            LOG.debug("week > 52 rewritten to " + week);
        }
        cal.set(Calendar.WEEK_OF_YEAR, week);
        fireCurrentWeekChanged();
    }

    /**
     * @return The week without year context
     */
    public Calendar getCurrentWeek() {
        return (Calendar) cal.clone();
    }

    public void addToCurrentWeek(int diff) {
        LOG.debug("Add to current week: " + diff);
        cal.add(Calendar.WEEK_OF_YEAR, diff);
        fireCurrentWeekChanged();
    }

}