content: /*
   * Copyright (c) 2016-2017 Daniel Ennis (Aikar) - MIT License
   *
   *  Permission is hereby granted, free of charge, to any person obtaining
   *  a copy of this software and associated documentation files (the
   *  "Software"), to deal in the Software without restriction, including
   *  without limitation the rights to use, copy, modify, merge, publish,
   *  distribute, sublicense, and/or sell copies of the Software, and to
   *  permit persons to whom the Software is furnished to do so, subject to
   *  the following conditions:
   *
   *  The above copyright notice and this permission notice shall be
   *  included in all copies or substantial portions of the Software.
   *
   *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
   *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
   *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
   *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  package co.aikar.commands;
  
  import net.jodah.expiringmap.ExpirationPolicy;
  import net.jodah.expiringmap.ExpiringMap;
  
  import java.util.Map;
  import java.util.concurrent.TimeUnit;
  import java.util.regex.Pattern;
  
  @SuppressWarnings("WeakerAccess")
  final class ACFPatterns {
      public static final Pattern COMMA = Pattern.compile(",");
      public static final Pattern PERCENTAGE = Pattern.compile("%", Pattern.LITERAL);
      public static final Pattern NEWLINE = Pattern.compile("\n");
      public static final Pattern DASH = Pattern.compile("-");
      public static final Pattern UNDERSCORE = Pattern.compile("_");
      public static final Pattern SPACE = Pattern.compile(" ");
      public static final Pattern SEMICOLON = Pattern.compile(";");
      public static final Pattern COLON = Pattern.compile(":");
      public static final Pattern COLONEQUALS = Pattern.compile("([:=])");
      public static final Pattern PIPE = Pattern.compile("\\|");
      public static final Pattern NON_ALPHA_NUMERIC = Pattern.compile("[^a-zA-Z0-9]");
      public static final Pattern INTEGER = Pattern.compile("^[0-9]+$");
      public static final Pattern VALID_NAME_PATTERN = Pattern.compile("^[a-zA-Z0-9_$]{1,16}$");
      public static final Pattern NON_PRINTABLE_CHARACTERS = Pattern.compile("[^\\x20-\\x7F]");
      public static final Pattern EQUALS = Pattern.compile("=");
      public static final Pattern FORMATTER = Pattern.compile("<c(?<color>\\d+)>(?<msg>.*?)</c\\1>", Pattern.CASE_INSENSITIVE);
      public static final Pattern I18N_STRING = Pattern.compile("\\{@@(?<key>.+?)}", Pattern.CASE_INSENSITIVE);
      public static final Pattern REPLACEMENT_PATTERN = Pattern.compile("%\\{.[^\\s]*}");
  
  
      private ACFPatterns() {
      }
  
      static final Map<String, Pattern> patternCache = ExpiringMap.builder()
              .maxSize(200)
              .expiration(1, TimeUnit.HOURS)
              .expirationPolicy(ExpirationPolicy.ACCESSED)
              .build();
  
      /**
       * Gets a pattern and compiles it.
       * If the pattern is stored already in {@link #patternCache}, it will simply fetch it from there.
       * If it is not, it will store it there for further use.
       * <p>
       * The {@link #patternCache} does not contain the constant patterns defined in this class.
       *
       * @param pattern The raw pattern in a String.
       * @return The pattern which has been cached.
       */
      public static Pattern getPattern(String pattern) {
          return patternCache.computeIfAbsent(pattern, s -> Pattern.compile(pattern));
      }
  }
  