content: /*
   * 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.apache.camel.spring.boot.cluster;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * This class is a copy from camel-core so we do not have direct dependency on internal classes
   */
  public final class TimePatternConverter {
      private static final Pattern NUMBERS_ONLY_STRING_PATTERN = Pattern.compile("^[-]?(\\d)+$",
              Pattern.CASE_INSENSITIVE);
      private static final Pattern HOUR_REGEX_PATTERN = Pattern.compile("((\\d)*(\\d))h(our(s)?)?",
              Pattern.CASE_INSENSITIVE);
      private static final Pattern MINUTES_REGEX_PATTERN = Pattern.compile("((\\d)*(\\d))m(in(ute(s)?)?)?",
              Pattern.CASE_INSENSITIVE);
      private static final Pattern SECONDS_REGEX_PATTERN = Pattern.compile("((\\d)*(\\d))s(ec(ond)?(s)?)?",
              Pattern.CASE_INSENSITIVE);
  
      /**
       * Utility classes should not have a public constructor.
       */
      private TimePatternConverter() {
      }
  
      public static long toMilliSeconds(String source) throws IllegalArgumentException {
          long milliseconds = 0;
          boolean foundFlag = false;
  
          checkCorrectnessOfPattern(source);
          Matcher matcher;
  
          matcher = createMatcher(NUMBERS_ONLY_STRING_PATTERN, source);
          if (matcher.find()) {
              // Note: This will also be used for regular numeric strings.
              // This String -> long converter will be used for all strings.
              milliseconds = Long.valueOf(source);
          } else {
              matcher = createMatcher(HOUR_REGEX_PATTERN, source);
              if (matcher.find()) {
                  milliseconds = milliseconds + (3600000 * Long.valueOf(matcher.group(1)));
                  foundFlag = true;
              }
  
              matcher = createMatcher(MINUTES_REGEX_PATTERN, source);
              if (matcher.find()) {
                  long minutes = Long.valueOf(matcher.group(1));
                  if ((minutes > 59) && foundFlag) {
                      throw new IllegalArgumentException(
                              "Minutes should contain a valid value between 0 and 59: " + source);
                  }
                  foundFlag = true;
                  milliseconds = milliseconds + (60000 * minutes);
              }
  
              matcher = createMatcher(SECONDS_REGEX_PATTERN, source);
              if (matcher.find()) {
                  long seconds = Long.valueOf(matcher.group(1));
                  if ((seconds > 59) && foundFlag) {
                      throw new IllegalArgumentException(
                              "Seconds should contain a valid value between 0 and 59: " + source);
                  }
                  foundFlag = true;
                  milliseconds = milliseconds + (1000 * seconds);
              }
  
              // No pattern matched... initiating fallback check and conversion (if required).
              // The source at this point may contain illegal values or special characters
              if (!foundFlag) {
                  milliseconds = Long.valueOf(source);
              }
          }
  
          return milliseconds;
      }
  
      private static void checkCorrectnessOfPattern(String source) {
          // replace only numbers once
          Matcher matcher = createMatcher(NUMBERS_ONLY_STRING_PATTERN, source);
          String replaceSource = matcher.replaceFirst("");
  
          // replace hour string once
          matcher = createMatcher(HOUR_REGEX_PATTERN, replaceSource);
          if (matcher.find() && matcher.find()) {
              throw new IllegalArgumentException("Hours should not be specified more then once: " + source);
          }
          replaceSource = matcher.replaceFirst("");
  
          // replace minutes once
          matcher = createMatcher(MINUTES_REGEX_PATTERN, replaceSource);
          if (matcher.find() && matcher.find()) {
              throw new IllegalArgumentException("Minutes should not be specified more then once: " + source);
          }
          replaceSource = matcher.replaceFirst("");
  
          // replace seconds once
          matcher = createMatcher(SECONDS_REGEX_PATTERN, replaceSource);
          if (matcher.find() && matcher.find()) {
              throw new IllegalArgumentException("Seconds should not be specified more then once: " + source);
          }
          replaceSource = matcher.replaceFirst("");
  
          if (replaceSource.length() > 0) {
              throw new IllegalArgumentException("Illegal characters: " + source);
          }
      }
  
      private static Matcher createMatcher(Pattern pattern, String source) {
          return pattern.matcher(source);
      }
  }
  