| /* |
| * 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.rya.indexing.pcj.fluo.client.util; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import java.text.NumberFormat; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.rya.indexing.pcj.fluo.client.util.Report.ReportItem; |
| import org.apache.rya.indexing.pcj.storage.PcjMetadata; |
| import org.apache.rya.indexing.pcj.storage.accumulo.VariableOrder; |
| import org.openrdf.query.parser.ParsedQuery; |
| import org.openrdf.query.parser.sparql.SPARQLParser; |
| import org.openrdf.queryrender.sparql.SPARQLQueryRenderer; |
| |
| /** |
| * Pretty renders the state of a query's {@link PcjMetadata}. |
| */ |
| public class PcjMetadataRenderer { |
| |
| /** |
| * Pretty render the state of a PCJ. |
| * |
| * @param queryId - The ID of the query the metadata is from. (not null) |
| * @param metadata - Metadata about one of the PCJs. (not null) |
| * @return A pretty render of a PCJ's state. |
| * @throws Exception The SPARQL within the metadata could not be parsed or |
| * it could not be rendered. |
| */ |
| public String render(final String queryId, final PcjMetadata metadata) throws Exception { |
| checkNotNull(metadata); |
| |
| // Pretty format the cardinality. |
| final String cardinality = NumberFormat.getInstance().format( metadata.getCardinality() ); |
| |
| // Pretty format and split the SPARQL query into lines. |
| final SPARQLParser parser = new SPARQLParser(); |
| final SPARQLQueryRenderer renderer = new SPARQLQueryRenderer(); |
| final ParsedQuery pq = parser.parseQuery(metadata.getSparql(), null); |
| final String prettySparql = renderer.render(pq); |
| final String[] sparqlLines = StringUtils.split(prettySparql, '\n'); |
| |
| // Split the variable orders into lines. |
| final String[] varOrderLines = new String[ metadata.getVarOrders().size() ]; |
| int i = 0; |
| for(final VariableOrder varOrder : metadata.getVarOrders()) { |
| varOrderLines[i++] = varOrder.toString(); |
| } |
| |
| // Create the report. |
| final Report.Builder builder = Report.builder(); |
| builder.appendItem( new ReportItem("Query ID", queryId) ); |
| builder.appendItem( new ReportItem("Cardinality", cardinality) ); |
| builder.appendItem( new ReportItem("Export Variable Orders", varOrderLines)); |
| builder.appendItem( new ReportItem("SPARQL", sparqlLines) ); |
| return builder.build().toString(); |
| } |
| |
| /** |
| * Pretty render the state of many PCJs. |
| * |
| * @param metadata - The PCJ states to render. The key within the map is |
| * the statem's Query Id. (not null) |
| * @return A pretty render of a PCJs' state. |
| * @throws Exception A SPARQL within the metadata could not be parsed or |
| * it could not be rendered. |
| */ |
| public String render(final Map<String, PcjMetadata> metadata) throws Exception { |
| checkNotNull(metadata); |
| |
| final StringBuilder formatted = new StringBuilder(); |
| |
| for(final Entry<String, PcjMetadata> entry : metadata.entrySet()) { |
| final String formattedQuery = render(entry.getKey(), entry.getValue()); |
| formatted.append(formattedQuery).append("\n"); |
| } |
| |
| return formatted.toString(); |
| } |
| } |