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/*
 * 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.hive.hplsql;

import java.util.List;
import java.util.stream.Collectors;

/**
 * Table row (all columns)
 */
public class Row {
  private final ColumnMap colMap = new ColumnMap();

  public Row() {}
  
  Row(Row row) {
    for (Column c : row.colMap.columns()) {
      addColumnDefinition(c.getName(), c.getType());
    }    
  }
  
  /**
   * Add a column with specified data type
   */
  public void addColumnDefinition(String name, String type) {
    colMap.add(new Column(name, type, null));
  }

  public void addColumn(String name, String type, Var value) {
    Column column = new Column(name, type, value);
    colMap.add(column);
  }
  
  /**
   * Get the data type by column name
   */
  public String getType(String name) {
    Column column = colMap.get(name);
    return column != null ? column.getType() : null;
  }
  
  /**
   * Get value by index
   */
  public Var getValue(int i) {
    return colMap.at(i).getValue();
  }
  
  /**
   * Get value by column name
   */
  Var getValue(String name) {
    Column column = colMap.get(name);
    return column != null ? column.getValue() : null;
  }
  
  /**
   * Get columns
   */
  List getColumns() {
    return colMap.columns();
  }
  
  /**
   * Get column by index
   */
  public Column getColumn(int i) {
    return colMap.at(i);
  }
  
  /**
   * Get the number of columns
   */
  int size() {
    return colMap.size();
  }

  public List columnDefinitions() {
    return getColumns().stream().map(Column::definition).collect(Collectors.toList());
  }
}