org.dmfs.rfc5545.recur.ByHourExpander Maven / Gradle / Ivy

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/*
 * Copyright (C) 2013 Marten Gajda 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

package org.dmfs.rfc5545.recur;

import org.dmfs.rfc5545.Instance;
import org.dmfs.rfc5545.calendarmetrics.CalendarMetrics;
import org.dmfs.rfc5545.recur.RecurrenceRule.Part;


/**
 * A filter that expands recurrence rules by hour.
 *
 * @author Marten Gajda
 */
final class ByHourExpander extends ByExpander
{
    /**
     * The hour list from the rule.
     */
    private final int[] mHours;


    public ByHourExpander(RecurrenceRule rule, RuleIterator previous, CalendarMetrics calendarTools, long start)
    {
        super(previous, calendarTools, start);
        mHours = StaticUtils.ListToSortedArray(rule.getByPart(Part.BYHOUR));
    }


    @Override
    void expand(long instance, long start)
    {
        // add a new instance for every hour in mHours
        for (int hour : mHours)
        {
            addInstance(Instance.setHour(instance, hour));
        }
    }
}