| /* |
| * 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 org.jclouds.date.internal; |
| |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| public class DateUtils { |
| |
| private static final String TZ_REGEX = "([+-][0-9][0-9](:?[0-9][0-9])?|Z)"; |
| private static final Pattern MILLIS_PATTERN = Pattern.compile("(.*\\.[0-9][0-9][0-9])[0-9]*" + TZ_REGEX + "?"); |
| // This regexp will match all TZ forms that are valid is ISO 8601 |
| private static final Pattern TZ_PATTERN = Pattern.compile("(.*)" + TZ_REGEX + "$"); |
| |
| public static String trimToMillis(String toParse) { |
| Matcher matcher = MILLIS_PATTERN.matcher(toParse); |
| if (matcher.find()) { |
| toParse = matcher.group(1); |
| if (matcher.group(2) != null) |
| toParse += matcher.group(2); |
| } |
| return toParse; |
| } |
| |
| private static final Pattern SECOND_PATTERN = Pattern.compile(".*[0-2][0-9]:00"); |
| |
| public static String trimTZ(String toParse) { |
| Matcher matcher = TZ_PATTERN.matcher(toParse); |
| if (matcher.find()) { |
| toParse = matcher.group(1); |
| } |
| // TODO explain why this check is here |
| if (toParse.length() == 25 && SECOND_PATTERN.matcher(toParse).matches()) |
| toParse = toParse.substring(0, toParse.length() - 6); |
| return toParse; |
| } |
| |
| public static String findTZ(String toParse) { |
| Matcher matcher = TZ_PATTERN.matcher(toParse); |
| if (matcher.find()) { |
| // Remove ':' from the TZ string, as SimpleDateFormat can't handle it |
| String tz = matcher.group(2).replace(":", ""); |
| // Append '00; if we only have a two digit TZ, as SimpleDateFormat |
| if (tz.length() == 2) tz += "00"; |
| // Replace Z with +0000 |
| if (tz.equals("Z")) return "+0000"; |
| return tz; |
| } else { |
| // Return +0000 if no time zone |
| return "+0000"; |
| } |
| } |
| |
| } |