info.rynkowski.hamsterclient.ui.utils.TimeConverter.java Source code

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Here is the source code for info.rynkowski.hamsterclient.ui.utils.TimeConverter.java

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/*
 * Copyright (C) 2015 Grzegorz Rynkowski
 *
 * 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 info.rynkowski.hamsterclient.ui.utils;

import android.support.annotation.NonNull;
import com.google.common.base.Optional;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;

public class TimeConverter {

    public static @NonNull String toString(@NonNull Calendar calendar, @NonNull String format) {
        if (calendar.getTimeInMillis() != 0) {
            SimpleDateFormat dateFormatGmt = new SimpleDateFormat(format, Locale.getDefault());
            return dateFormatGmt.format(calendar.getTime());
        }
        return "";
    }

    public static @NonNull String toString(@NonNull Optional<Calendar> calendar, @NonNull String format) {
        if (calendar.isPresent()) {
            return toString(calendar.get(), format);
        }
        return "";
    }
}