| /* |
| * 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.response.transform; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.index.ReaderUtil; |
| import org.apache.lucene.queries.function.FunctionValues; |
| import org.apache.lucene.queries.function.ValueSource; |
| import org.apache.solr.common.SolrDocument; |
| import org.apache.solr.common.SolrException; |
| import org.apache.solr.response.ResultContext; |
| import org.apache.solr.search.QParser; |
| import org.apache.solr.search.SolrIndexSearcher; |
| |
| /** |
| * Add values from a ValueSource (function query etc) |
| * |
| * NOT really sure how or if this could work... |
| * |
| * |
| * @since solr 4.0 |
| */ |
| public class ValueSourceAugmenter extends DocTransformer |
| { |
| public final String name; |
| public final QParser qparser; |
| public final ValueSource valueSource; |
| |
| |
| |
| public ValueSourceAugmenter( String name, QParser qparser, ValueSource valueSource ) |
| { |
| this.name = name; |
| this.qparser = qparser; |
| this.valueSource = valueSource; |
| } |
| |
| @Override |
| public String getName() |
| { |
| return name; |
| } |
| |
| @Override |
| @SuppressWarnings({"unchecked"}) |
| public void setContext( ResultContext context ) { |
| super.setContext(context); |
| try { |
| searcher = context.getSearcher(); |
| readerContexts = searcher.getIndexReader().leaves(); |
| fcontext = ValueSource.newContext(searcher); |
| this.valueSource.createWeight(fcontext, searcher); |
| } catch (IOException e) { |
| throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, e); |
| } |
| } |
| |
| @SuppressWarnings({"rawtypes"}) |
| Map fcontext; |
| SolrIndexSearcher searcher; |
| List<LeafReaderContext> readerContexts; |
| |
| @Override |
| public void transform(SolrDocument doc, int docid) { |
| // This is only good for random-access functions |
| |
| try { |
| |
| // TODO: calculate this stuff just once across diff functions |
| int idx = ReaderUtil.subIndex(docid, readerContexts); |
| LeafReaderContext rcontext = readerContexts.get(idx); |
| @SuppressWarnings({"unchecked"}) |
| FunctionValues values = valueSource.getValues(fcontext, rcontext); |
| int localId = docid - rcontext.docBase; |
| setValue(doc,values.objectVal(localId)); |
| } catch (IOException e) { |
| throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "exception at docid " + docid + " for valuesource " + valueSource, e); |
| } |
| } |
| |
| /** Always returns true */ |
| @Override |
| public boolean needsSolrIndexSearcher() { return true; } |
| |
| protected void setValue(SolrDocument doc, Object val) { |
| if(val!=null) { |
| doc.setField( name, val ); |
| } |
| } |
| } |