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.hive.service.cli;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.hadoop.hive.metastore.api.FieldSchema;
  import org.apache.hadoop.hive.metastore.api.Schema;
  import org.apache.hive.service.cli.thrift.TColumnDesc;
  import org.apache.hive.service.cli.thrift.TTableSchema;
  
  /**
   * TableSchema.
   *
   */
  public class TableSchema {
    private final List<ColumnDescriptor> columns = new ArrayList<ColumnDescriptor>();
  
    public TableSchema() {
    }
  
    public TableSchema(int numColumns) {
      // TODO: remove this constructor
    }
  
    public TableSchema(TTableSchema tTableSchema) {
      for (TColumnDesc tColumnDesc : tTableSchema.getColumns()) {
        columns.add(new ColumnDescriptor(tColumnDesc));
      }
    }
  
    public TableSchema(List<FieldSchema> fieldSchemas) {
      int pos = 1;
      for (FieldSchema field : fieldSchemas) {
        columns.add(new ColumnDescriptor(field, pos++));
      }
    }
  
    public TableSchema(Schema schema) {
      this(schema.getFieldSchemas());
    }
  
    public List<ColumnDescriptor> getColumnDescriptors() {
      return new ArrayList<ColumnDescriptor>(columns);
    }
  
    public ColumnDescriptor getColumnDescriptorAt(int pos) {
      return columns.get(pos);
    }
  
    public int getSize() {
      return columns.size();
    }
  
    public void clear() {
      columns.clear();
    }
  
  
    public TTableSchema toTTableSchema() {
      TTableSchema tTableSchema = new TTableSchema();
      for (ColumnDescriptor col : columns) {
        tTableSchema.addToColumns(col.toTColumnDesc());
      }
      return tTableSchema;
    }
  
    public Type[] toTypes() {
      Type[] types = new Type[columns.size()];
      for (int i = 0; i < types.length; i++) {
        types[i] = columns.get(i).getType();
      }
      return types;
    }
  
    public TableSchema addPrimitiveColumn(String columnName, Type columnType, String columnComment) {
      columns.add(ColumnDescriptor.newPrimitiveColumnDescriptor(columnName, columnComment, columnType, columns.size() + 1));
      return this;
    }
  
    public TableSchema addStringColumn(String columnName, String columnComment) {
      columns.add(ColumnDescriptor.newPrimitiveColumnDescriptor(columnName, columnComment, Type.STRING_TYPE, columns.size() + 1));
      return this;
    }
  }
  