/**
* 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.lens.client.resultset;
import org.apache.lens.client.exceptions.LensClientIOException;
/**
* This interface represents the query ResultSet that the clients can iterate over
*/
public interface ResultSet{
/**
* Returns true if next row is present in result set and moves the cursor to that row.
*
* @throws LensClientIOException
*/
boolean next() throws LensClientIOException;
/**
* @return column values for the current row
*/
String[] getRow() throws LensClientIOException;
/**
* Returns the column names for this result set if available otherwise null is returned
* @throws LensClientIOException
*/
String[] getColumnNames() throws LensClientIOException;
}