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 org.apache.calcite.sql.parser.SqlParserPos;
  import org.apache.calcite.sql.type.SqlTypeName;
  
  import java.util.List;
  
  /**
   * Abstract base for character and binary string literals.
   */
  abstract class SqlAbstractStringLiteral extends SqlLiteral {
    //~ Constructors -----------------------------------------------------------
  
    protected SqlAbstractStringLiteral(
        Object value,
        SqlTypeName typeName,
        SqlParserPos pos) {
      super(value, typeName, pos);
    }
  
    //~ Methods ----------------------------------------------------------------
  
    /**
     * Helper routine for {@link SqlUtil#concatenateLiterals}.
     *
     * @param literals homogeneous StringLiteral args
     * @return StringLiteral with concatenated value. this == lits[0], used only
     * for method dispatch.
     */
    protected abstract SqlAbstractStringLiteral concat1(
        List<SqlLiteral> literals);
  }
  