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/*
 * Copyright 2010-2013 Ning, Inc.
 *
 * Ning licenses this file to you 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 com.ning.billing.clock;


import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.LocalDate;


public class DefaultClock implements Clock {

    @Override
    public DateTime getNow(final DateTimeZone tz) {
        final DateTime result = new DateTime(tz);
        return truncateMs(result);
    }

    @Override
    public DateTime getUTCNow() {
        return getNow(DateTimeZone.UTC);
    }

    @Override
    public LocalDate getUTCToday() {
        return getToday(DateTimeZone.UTC);
    }

    @Override
    public LocalDate getToday(final DateTimeZone timeZone) {
        return new LocalDate(getUTCNow(), timeZone);
    }

    public static DateTime toUTCDateTime(final DateTime input) {
        if (input == null) {
            return null;
        }
        final DateTime result = input.toDateTime(DateTimeZone.UTC);
        return truncateMs(result);
    }

    public static DateTime truncateMs(final DateTime input) {
        return input.minus(input.getMillisOfSecond());
    }
}