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.model;
  
  import com.fasterxml.jackson.annotation.JsonCreator;
  import com.fasterxml.jackson.annotation.JsonProperty;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * JSON object representing a column.
   *
   * <p>Occurs within {@link JsonTable#columns}.
   *
   * @see JsonRoot Description of JSON schema elements
   */
  public class JsonColumn {
    /** Column name.
     *
     * <p>Required, and must be unique within the table.
     */
    public final String name;
  
    @JsonCreator
    public JsonColumn(@JsonProperty(value = "name", required = true) String name) {
      this.name = requireNonNull(name, "name");
    }
  
    public void accept(ModelHandler handler) {
      handler.visit(this);
    }
  }
  