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.calcite.sql;
  
  import java.util.EnumSet;
  import java.util.Locale;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * SqlAccessType is represented by a set of allowed access types.
   *
   * @see SqlAccessEnum
   */
  public class SqlAccessType {
    //~ Static fields/initializers ---------------------------------------------
  
    public static final SqlAccessType ALL =
        new SqlAccessType(EnumSet.allOf(SqlAccessEnum.class));
    public static final SqlAccessType READ_ONLY =
        new SqlAccessType(EnumSet.of(SqlAccessEnum.SELECT));
    public static final SqlAccessType WRITE_ONLY =
        new SqlAccessType(EnumSet.of(SqlAccessEnum.INSERT));
  
    //~ Instance fields --------------------------------------------------------
  
    private final EnumSet<SqlAccessEnum> accessEnums;
  
    //~ Constructors -----------------------------------------------------------
  
    public SqlAccessType(EnumSet<SqlAccessEnum> accessEnums) {
      this.accessEnums = accessEnums;
    }
  
    //~ Methods ----------------------------------------------------------------
  
    public boolean allowsAccess(SqlAccessEnum access) {
      return accessEnums.contains(access);
    }
  
    @Override public String toString() {
      return accessEnums.toString();
    }
  
    public static SqlAccessType create(String[] accessNames) {
      EnumSet<SqlAccessEnum> enumSet = EnumSet.noneOf(SqlAccessEnum.class);
      for (String accessName : requireNonNull(accessNames, "accessNames")) {
        enumSet.add(
            SqlAccessEnum.valueOf(accessName.trim().toUpperCase(Locale.ROOT)));
      }
      return new SqlAccessType(enumSet);
    }
  
    public static SqlAccessType create(String accessString) {
      return create(
          requireNonNull(accessString, "accessString")
              .replace('[', ' ')
              .replace(']', ' ')
              .split(","));
    }
  }
  