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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.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;
}
}
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