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.bifromq.basecrdt.core.api;
  
  import com.google.common.base.Preconditions;
  import java.util.regex.Pattern;
  
  public final class CRDTURI {
      private static final Pattern NAME;
      private static final Pattern URI;
  
      static {
          String namePattern = "[\\w-:.@]+";
          StringBuilder uriPattern = new StringBuilder("^(");
          for (CausalCRDTType type : CausalCRDTType.values()) {
              uriPattern.append(type.name());
              uriPattern.append("|");
          }
          uriPattern.deleteCharAt(uriPattern.length() - 1);
          uriPattern.append("):").append(namePattern);
          NAME = Pattern.compile(namePattern);
          URI = Pattern.compile(uriPattern.toString());
      }
  
      public static boolean isValidURI(String uri) {
          return URI.matcher(uri).matches();
      }
  
      public static String toURI(CausalCRDTType type, String name) {
          Preconditions.checkArgument(NAME.matcher(name).matches(), "Invalid name " + name);
          return type.name() + ":" + name;
      }
  
      public static CausalCRDTType parseType(String uri) {
          checkURI(uri);
          return CausalCRDTType.valueOf(uri.split(":")[0]);
      }
  
      public static String parseName(String uri) {
          checkURI(uri);
          return uri.substring(uri.indexOf(":") + 1);
      }
  
      public static void checkURI(String uri) {
          Preconditions.checkArgument(isValidURI(uri), "Invalid CRDT replica uri format");
      }
  }
  