| /* |
| * Copyright 2017 HugeGraph Authors |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with this |
| * work for additional information regarding copyright ownership. The ASF |
| * 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.baidu.hugegraph.util; |
| |
| import java.util.Date; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import com.baidu.hugegraph.date.SafeDateFormat; |
| import com.google.common.collect.ImmutableMap; |
| |
| public final class DateUtil { |
| |
| public static final Date DATE_ZERO = new Date(0L); |
| |
| private static final Map<String, String> VALID_DFS = ImmutableMap.of( |
| "^\\d{4}-\\d{1,2}-\\d{1,2}", |
| "yyyy-MM-dd", |
| "^\\d{4}-\\d{1,2}-\\d{1,2}\\s\\d{2}:\\d{2}:\\d{2}", |
| "yyyy-MM-dd HH:mm:ss", |
| "^\\d{4}-\\d{1,2}-\\d{1,2}\\s\\d{2}:\\d{2}:\\d{2}\\.\\d{1,3}", |
| "yyyy-MM-dd HH:mm:ss.SSS" |
| ); |
| |
| private static final Map<String, SafeDateFormat> DATE_FORMATS = |
| new ConcurrentHashMap<>(); |
| |
| public static Date parse(String value) { |
| for (Map.Entry<String, String> entry : VALID_DFS.entrySet()) { |
| if (value.matches(entry.getKey())) { |
| return parse(value, entry.getValue()); |
| } |
| } |
| throw new IllegalArgumentException(String.format( |
| "Expected date format is: %s, but got '%s'", |
| VALID_DFS.values(), value)); |
| } |
| |
| public static Date parse(String value, String df) { |
| SafeDateFormat dateFormat = getDateFormat(df); |
| return dateFormat.parse(value); |
| } |
| |
| public static Date now() { |
| return new Date(); |
| } |
| |
| private static SafeDateFormat getDateFormat(String df) { |
| SafeDateFormat dateFormat = DATE_FORMATS.get(df); |
| if (dateFormat == null) { |
| dateFormat = new SafeDateFormat(df); |
| SafeDateFormat previous = DATE_FORMATS.putIfAbsent(df, dateFormat); |
| if (previous != null) { |
| dateFormat = previous; |
| } |
| } |
| return dateFormat; |
| } |
| |
| public static Object toPattern(String df) { |
| SafeDateFormat dateFormat = getDateFormat(df); |
| return dateFormat.toPattern(); |
| } |
| } |