| /** |
| * 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 com.datatorrent.lib.streamquery.index; |
| |
| import java.util.Map; |
| |
| import javax.validation.constraints.NotNull; |
| |
| /** |
| * Interface to define sql select statement indexes for column names,aggregate. |
| * <p> |
| * @displayName Index |
| * @category Stream Manipulators |
| * @tags index |
| * @since 0.3.2 |
| */ |
| public interface Index |
| { |
| /** |
| * Function can key/value hash map, does metric implemented by sub class. |
| */ |
| public void filter(@NotNull Map<String, Object> row, @NotNull Map<String, Object> collect); |
| } |