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.carbondata.core.metadata.schema.table.column;
  
  import java.io.DataInput;
  import java.io.DataOutput;
  import java.io.IOException;
  import java.io.Serializable;
  
  import org.apache.carbondata.core.metadata.schema.table.RelationIdentifier;
  import org.apache.carbondata.core.metadata.schema.table.Writable;
  
  /**
   * To maintain the relation of child column to parent table column
   */
  public class ParentColumnTableRelation implements Serializable, Writable {
  
    private static final long serialVersionUID = 1321746085997166646L;
  
    private RelationIdentifier relationIdentifier;
    /**
     * parent column id
     */
    private String columnId;
  
    private String columnName;
  
    public ParentColumnTableRelation(RelationIdentifier relationIdentifier, String columnId,
        String columnName) {
      this.relationIdentifier = relationIdentifier;
      this.columnId = columnId;
      this.columnName = columnName;
    }
  
    public RelationIdentifier getRelationIdentifier() {
      return relationIdentifier;
    }
  
    public String getColumnId() {
      return columnId;
    }
  
    public String getColumnName() {
      return columnName;
    }
  
    @Override
    public void write(DataOutput out) throws IOException {
      relationIdentifier.write(out);
      out.writeUTF(columnId);
      out.writeUTF(columnName);
    }
  
    @Override
    public void readFields(DataInput in) throws IOException {
      this.relationIdentifier = new RelationIdentifier(null, null, null);
      relationIdentifier.readFields(in);
      this.columnId = in.readUTF();
      this.columnName = in.readUTF();
    }
  }
  