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.validate;
  
  import org.apache.calcite.sql.SqlIdentifier;
  
  import com.google.common.collect.Ordering;
  
  import java.util.Comparator;
  import java.util.List;
  
  /**
   * An interface of an object identifier that represents a SqlIdentifier.
   */
  public interface SqlMoniker {
    Comparator<SqlMoniker> COMPARATOR =
        new Comparator<SqlMoniker>() {
          final Ordering<Iterable<String>> listOrdering =
              Ordering.<String>natural().lexicographical();
  
          @Override public int compare(SqlMoniker o1, SqlMoniker o2) {
            int c = o1.getType().compareTo(o2.getType());
            if (c == 0) {
              c =
                  listOrdering.compare(o1.getFullyQualifiedNames(),
                      o2.getFullyQualifiedNames());
            }
            return c;
          }
        };
  
    //~ Methods ----------------------------------------------------------------
  
    /**
     * Returns the type of object referred to by this moniker. Never null.
     */
    SqlMonikerType getType();
  
    /**
     * Returns the array of component names.
     */
    List<String> getFullyQualifiedNames();
  
    /**
     * Creates a {@link SqlIdentifier} containing the fully-qualified name.
     */
    SqlIdentifier toIdentifier();
  
    String id();
  }
  