| /* |
| * 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.druid.query.topn; |
| |
| import com.google.common.collect.Lists; |
| import org.apache.druid.java.util.common.granularity.Granularities; |
| import org.apache.druid.java.util.common.granularity.Granularity; |
| import org.apache.druid.query.DataSource; |
| import org.apache.druid.query.TableDataSource; |
| import org.apache.druid.query.aggregation.AggregatorFactory; |
| import org.apache.druid.query.aggregation.PostAggregator; |
| import org.apache.druid.query.dimension.DefaultDimensionSpec; |
| import org.apache.druid.query.dimension.DimensionSpec; |
| import org.apache.druid.query.filter.DimFilter; |
| import org.apache.druid.query.filter.InDimFilter; |
| import org.apache.druid.query.filter.SelectorDimFilter; |
| import org.apache.druid.query.spec.LegacySegmentSpec; |
| import org.apache.druid.query.spec.QuerySegmentSpec; |
| import org.apache.druid.segment.VirtualColumn; |
| import org.apache.druid.segment.VirtualColumns; |
| import org.joda.time.Interval; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * A Builder for TopNQuery. |
| * |
| * Required: dataSource(), intervals(), metric() and threshold() must be called before build() |
| * Additional requirement for numeric metric sorts: aggregators() must be called before build() |
| * |
| * Optional: filters(), granularity(), postAggregators() and context() can be called before build() |
| * |
| * Usage example: |
| * <pre><code> |
| * TopNQuery query = new TopNQueryBuilder() |
| * .dataSource("Example") |
| * .dimension("example_dim") |
| * .metric("example_metric") |
| * .threshold(100) |
| * .intervals("2012-01-01/2012-01-02") |
| * .build(); |
| * </code></pre> |
| * |
| * @see TopNQuery |
| */ |
| public class TopNQueryBuilder |
| { |
| private DataSource dataSource; |
| private VirtualColumns virtualColumns; |
| private DimensionSpec dimensionSpec; |
| private TopNMetricSpec topNMetricSpec; |
| private int threshold; |
| private QuerySegmentSpec querySegmentSpec; |
| private DimFilter dimFilter; |
| private Granularity granularity; |
| private List<AggregatorFactory> aggregatorSpecs; |
| private List<PostAggregator> postAggregatorSpecs; |
| private Map<String, Object> context; |
| |
| public TopNQueryBuilder() |
| { |
| dataSource = null; |
| virtualColumns = null; |
| dimensionSpec = null; |
| topNMetricSpec = null; |
| threshold = 0; |
| querySegmentSpec = null; |
| dimFilter = null; |
| granularity = Granularities.ALL; |
| aggregatorSpecs = new ArrayList<>(); |
| postAggregatorSpecs = new ArrayList<>(); |
| context = null; |
| } |
| |
| public TopNQueryBuilder(final TopNQuery query) |
| { |
| this.dataSource = query.getDataSource(); |
| this.virtualColumns = query.getVirtualColumns(); |
| this.dimensionSpec = query.getDimensionSpec(); |
| this.topNMetricSpec = query.getTopNMetricSpec(); |
| this.threshold = query.getThreshold(); |
| this.querySegmentSpec = query.getQuerySegmentSpec(); |
| this.dimFilter = query.getDimensionsFilter(); |
| this.granularity = query.getGranularity(); |
| this.aggregatorSpecs = query.getAggregatorSpecs(); |
| this.postAggregatorSpecs = query.getPostAggregatorSpecs(); |
| this.context = query.getContext(); |
| } |
| |
| public TopNQuery build() |
| { |
| return new TopNQuery( |
| dataSource, |
| virtualColumns, |
| dimensionSpec, |
| topNMetricSpec, |
| threshold, |
| querySegmentSpec, |
| dimFilter, |
| granularity, |
| aggregatorSpecs, |
| postAggregatorSpecs, |
| context |
| ); |
| } |
| |
| @Deprecated |
| public TopNQueryBuilder copy(TopNQuery query) |
| { |
| return new TopNQueryBuilder(query); |
| } |
| |
| @Deprecated |
| public TopNQueryBuilder copy(TopNQueryBuilder builder) |
| { |
| return new TopNQueryBuilder() |
| .dataSource(builder.dataSource) |
| .virtualColumns(builder.virtualColumns) |
| .dimension(builder.dimensionSpec) |
| .metric(builder.topNMetricSpec) |
| .threshold(builder.threshold) |
| .intervals(builder.querySegmentSpec) |
| .filters(builder.dimFilter) |
| .granularity(builder.granularity) |
| .aggregators(builder.aggregatorSpecs) |
| .postAggregators(builder.postAggregatorSpecs) |
| .context(builder.context); |
| } |
| |
| public TopNQueryBuilder dataSource(String d) |
| { |
| dataSource = new TableDataSource(d); |
| return this; |
| } |
| |
| public TopNQueryBuilder virtualColumns(VirtualColumns virtualColumns) |
| { |
| this.virtualColumns = virtualColumns; |
| return this; |
| } |
| |
| public TopNQueryBuilder virtualColumns(VirtualColumn... virtualColumns) |
| { |
| return virtualColumns(VirtualColumns.create(Arrays.asList(virtualColumns))); |
| } |
| |
| public TopNQueryBuilder dataSource(DataSource d) |
| { |
| dataSource = d; |
| return this; |
| } |
| |
| public TopNQueryBuilder dimension(String d) |
| { |
| return dimension(d, null); |
| } |
| |
| public TopNQueryBuilder dimension(String d, String outputName) |
| { |
| return dimension(new DefaultDimensionSpec(d, outputName)); |
| } |
| |
| public TopNQueryBuilder dimension(DimensionSpec d) |
| { |
| dimensionSpec = d; |
| return this; |
| } |
| |
| public TopNQueryBuilder metric(String s) |
| { |
| return metric(new NumericTopNMetricSpec(s)); |
| } |
| |
| public TopNQueryBuilder metric(TopNMetricSpec t) |
| { |
| topNMetricSpec = t; |
| return this; |
| } |
| |
| public TopNQueryBuilder threshold(int i) |
| { |
| threshold = i; |
| return this; |
| } |
| |
| public TopNQueryBuilder intervals(QuerySegmentSpec q) |
| { |
| querySegmentSpec = q; |
| return this; |
| } |
| |
| public TopNQueryBuilder intervals(String s) |
| { |
| querySegmentSpec = new LegacySegmentSpec(s); |
| return this; |
| } |
| |
| public TopNQueryBuilder intervals(List<Interval> l) |
| { |
| querySegmentSpec = new LegacySegmentSpec(l); |
| return this; |
| } |
| |
| public TopNQueryBuilder filters(String dimensionName, String value) |
| { |
| dimFilter = new SelectorDimFilter(dimensionName, value, null); |
| return this; |
| } |
| |
| public TopNQueryBuilder filters(String dimensionName, String value, String... values) |
| { |
| dimFilter = new InDimFilter(dimensionName, Lists.asList(value, values), null, null); |
| return this; |
| } |
| |
| public TopNQueryBuilder filters(DimFilter f) |
| { |
| dimFilter = f; |
| return this; |
| } |
| |
| public TopNQueryBuilder granularity(Granularity g) |
| { |
| granularity = g; |
| return this; |
| } |
| |
| @SuppressWarnings("unchecked") |
| public TopNQueryBuilder aggregators(List<? extends AggregatorFactory> a) |
| { |
| aggregatorSpecs = new ArrayList<>(a); // defensive copy |
| return this; |
| } |
| |
| public TopNQueryBuilder aggregators(AggregatorFactory... aggs) |
| { |
| aggregatorSpecs = Arrays.asList(aggs); |
| return this; |
| } |
| |
| public TopNQueryBuilder postAggregators(Collection<PostAggregator> p) |
| { |
| postAggregatorSpecs = new ArrayList<>(p); // defensive copy |
| return this; |
| } |
| |
| public TopNQueryBuilder postAggregators(PostAggregator... postAggs) |
| { |
| postAggregatorSpecs = Arrays.asList(postAggs); |
| return this; |
| } |
| |
| public TopNQueryBuilder context(Map<String, Object> c) |
| { |
| context = c; |
| return this; |
| } |
| |
| } |