| /* |
| * 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.handler; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.lucene.analysis.tokenattributes.CharTermAttribute; |
| import org.apache.solr.client.solrj.io.Tuple; |
| import org.apache.solr.client.solrj.io.eval.SourceEvaluator; |
| import org.apache.solr.client.solrj.io.stream.StreamContext; |
| import org.apache.solr.client.solrj.io.stream.expr.Explanation; |
| import org.apache.solr.client.solrj.io.stream.expr.Explanation.ExpressionType; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamExpression; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamExpressionParameter; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamExpressionValue; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamFactory; |
| import org.apache.solr.common.SolrException; |
| import org.apache.lucene.analysis.*; |
| import org.apache.solr.core.SolrCore; |
| |
| public class AnalyzeEvaluator extends SourceEvaluator { |
| private static final long serialVersionUID = 1L; |
| |
| private String fieldName; |
| private String analyzerField; |
| private Analyzer analyzer; |
| |
| public AnalyzeEvaluator(String _fieldName, String _analyzerField) { |
| init(_fieldName, _analyzerField); |
| } |
| |
| public AnalyzeEvaluator(StreamExpression expression, StreamFactory factory) throws IOException{ |
| String _fieldName = factory.getValueOperand(expression, 0); |
| String _analyzerField = factory.getValueOperand(expression, 1); |
| init(_fieldName, _analyzerField); |
| } |
| |
| public void setStreamContext(StreamContext context) { |
| this.streamContext = context; |
| Object solrCoreObj = context.get("solr-core"); |
| if (solrCoreObj == null || !(solrCoreObj instanceof SolrCore) ) { |
| throw new SolrException(SolrException.ErrorCode.INVALID_STATE, "StreamContext must have SolrCore in solr-core key"); |
| } |
| |
| analyzer = ((SolrCore) solrCoreObj).getLatestSchema().getFieldType(analyzerField).getIndexAnalyzer(); |
| } |
| |
| private void init(String fieldName, String analyzerField) { |
| this.fieldName = fieldName; |
| if(analyzerField == null) { |
| this.analyzerField = fieldName; |
| } else { |
| this.analyzerField = analyzerField; |
| } |
| } |
| |
| @Override |
| public Object evaluate(Tuple tuple) throws IOException { |
| String value = null; |
| Object obj = tuple.get(fieldName); |
| |
| if(obj == null) { |
| value = fieldName; |
| } else { |
| value = obj.toString(); |
| } |
| |
| List<String> tokens = new ArrayList<>(); |
| |
| try(TokenStream tokenStream = analyzer.tokenStream(analyzerField, value)) { |
| CharTermAttribute termAtt = tokenStream.getAttribute(CharTermAttribute.class); |
| tokenStream.reset(); |
| while (tokenStream.incrementToken()) { |
| tokens.add(termAtt.toString()); |
| } |
| tokenStream.end(); |
| } |
| return tokens; |
| } |
| |
| @Override |
| public StreamExpressionParameter toExpression(StreamFactory factory) throws IOException { |
| return new StreamExpressionValue(fieldName); |
| } |
| |
| @Override |
| public Explanation toExplanation(StreamFactory factory) throws IOException { |
| return new Explanation(nodeId.toString()) |
| .withExpressionType(ExpressionType.EVALUATOR) |
| .withImplementingClass(getClass().getName()) |
| .withExpression(toExpression(factory).toString()); |
| } |
| |
| } |