| /* |
| * Copyright 2022 The Android Open Source Project |
| * |
| * 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 androidx.appsearch.utils; |
| |
| import static androidx.annotation.RestrictTo.Scope.LIBRARY; |
| |
| import androidx.annotation.NonNull; |
| import androidx.annotation.RestrictTo; |
| |
| import java.text.DateFormat; |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.Date; |
| |
| /** |
| * Helper class used to validate date time formats. |
| * |
| * @hide |
| */ |
| @RestrictTo(LIBRARY) |
| public final class DateTimeFormatValidator { |
| private DateTimeFormatValidator() {} |
| |
| /** |
| * Returns true if the date string matches yyyy-MM-dd |
| */ |
| public static boolean validateISO8601Date(@NonNull String dateString) { |
| return validateDateFormat("yyyy-MM-dd", dateString); |
| } |
| |
| /** |
| * Returns true if the date string matches yyyy-MM-ddTHH:mm:ss |
| */ |
| public static boolean validateISO8601DateTime(@NonNull String dateString) { |
| return validateDateFormat("yyyy-MM-dd'T'HH:mm:ss", dateString); |
| } |
| |
| /** |
| * Returns true if the date string matches the provided format exactly. |
| */ |
| public static boolean validateDateFormat(@NonNull String format, @NonNull String dateString) { |
| DateFormat dateFormat = new SimpleDateFormat(format); |
| dateFormat.setLenient(false); |
| try { |
| Date date = dateFormat.parse(dateString); |
| // ensure exact match |
| if (date == null || !dateString.equals(dateFormat.format(date))) { |
| return false; |
| } |
| } catch (ParseException e) { |
| return false; |
| } |
| |
| return true; |
| } |
| } |
