| /* |
| * 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.solr.search; |
| |
| import java.io.IOException; |
| |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.queries.payloads.PayloadDecoder; |
| import org.apache.lucene.queries.payloads.PayloadFunction; |
| import org.apache.lucene.queries.payloads.PayloadScoreQuery; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.spans.SpanQuery; |
| import org.apache.solr.common.SolrException; |
| import org.apache.solr.common.params.SolrParams; |
| import org.apache.solr.request.SolrQueryRequest; |
| import org.apache.solr.schema.FieldType; |
| import org.apache.solr.util.PayloadUtils; |
| |
| /** |
| * Creates a PayloadScoreQuery wrapping a SpanQuery created from the input value, applying text analysis and |
| * constructing SpanTermQuery or SpanNearQuery based on number of terms. |
| * |
| * <br>Other parameters: |
| * <br><code>f</code>, the field (required) |
| * <br><code>func</code>, payload function (min, max, or average; required) |
| * <br><code>includeSpanScore</code>, multiply payload function result by similarity score or not (default: false) |
| * <br>Example: <code>{!payload_score f=weighted_terms_dpf}Foo Bar</code> creates a SpanNearQuery with "Foo" followed by "Bar" |
| */ |
| public class PayloadScoreQParserPlugin extends QParserPlugin { |
| public static final String NAME = "payload_score"; |
| public static final String DEFAULT_OPERATOR = "phrase"; |
| |
| @Override |
| public QParser createParser(String qstr, SolrParams localParams, SolrParams params, SolrQueryRequest req) { |
| return new QParser(qstr, localParams, params, req) { |
| @Override |
| public Query parse() throws SyntaxError { |
| String field = localParams.get(QueryParsing.F); |
| String value = localParams.get(QueryParsing.V); |
| String func = localParams.get("func"); |
| String operator = localParams.get("operator", DEFAULT_OPERATOR); |
| if (!(operator.equalsIgnoreCase(DEFAULT_OPERATOR) || operator.equalsIgnoreCase("or"))) { |
| throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "Supported operators are : or , phrase"); |
| } |
| boolean includeSpanScore = localParams.getBool("includeSpanScore", false); |
| |
| if (field == null) { |
| throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "'f' not specified"); |
| } |
| |
| if (value == null) { |
| throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "query string missing"); |
| } |
| |
| FieldType ft = req.getCore().getLatestSchema().getFieldType(field); |
| Analyzer analyzer = ft.getQueryAnalyzer(); |
| SpanQuery query; |
| try { |
| query = PayloadUtils.createSpanQuery(field, value, analyzer, operator); |
| } catch (IOException e) { |
| throw new SolrException(SolrException.ErrorCode.BAD_REQUEST,e); |
| } |
| |
| if (query == null) { |
| throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "SpanQuery is null"); |
| } |
| |
| // note: this query(/parser) does not support func=first; 'first' is a payload() value source feature only |
| PayloadFunction payloadFunction = PayloadUtils.getPayloadFunction(func); |
| if (payloadFunction == null) throw new SyntaxError("Unknown payload function: " + func); |
| |
| PayloadDecoder payloadDecoder = req.getCore().getLatestSchema().getPayloadDecoder(field); |
| return new PayloadScoreQuery(query, payloadFunction, payloadDecoder, includeSpanScore); |
| } |
| }; |
| } |
| } |