/*
 * Copyright (C) 2013 Marten Gajda <marten@dmfs.org>
 *
 * 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.recur.RecurrenceRule.Part;


/**
 * A filter that limits recurrence rules by hour.
 *
 * @author Marten Gajda
 */
final class ByHourFilter implements ByFilter
{
    /**
     * The hour list from the rule.
     */
    private final int[] mHours;


    public ByHourFilter(RecurrenceRule rule)
    {
        mHours = StaticUtils.ListToArray(rule.getByPart(Part.BYHOUR));
    }


    @Override
    public boolean filter(long instance)
    {
        // check that the hour of the instance is in mHours
        return StaticUtils.linearSearch(mHours, Instance.hour(instance)) < 0;
    }

}
