/*
* Copyright (c) 2011 LinkedIn, Inc
*
* Licensed 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 com.flaptor.indextank.blender;
import java.util.Map;
import org.apache.log4j.Logger;
import com.flaptor.indextank.index.DocId;
import com.flaptor.indextank.index.Promoter;
import com.flaptor.indextank.index.QueryMatcher;
import com.flaptor.indextank.index.ScoredMatch;
import com.flaptor.indextank.index.TopMatches;
import com.flaptor.indextank.index.lsi.LargeScaleIndex;
import com.flaptor.indextank.index.rti.RealTimeIndex;
import com.flaptor.indextank.index.scorer.BoostsManager;
import com.flaptor.indextank.query.Query;
import com.flaptor.indextank.search.AbstractDocumentSearcher;
import com.flaptor.indextank.search.SearchResult;
import com.flaptor.indextank.search.SearchResults;
import com.flaptor.indextank.suggest.Suggestor;
import com.flaptor.indextank.util.SkippingIterable;
import com.flaptor.util.CollectionsUtil;
import com.flaptor.util.Execute;
import com.google.common.base.Function;
import com.google.common.base.Preconditions;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
/**
*
* @author Flaptor Team
*/
public class Blender extends AbstractDocumentSearcher implements QueryMatcher {
@SuppressWarnings("unused")
private static final Logger logger = Logger.getLogger(Execute.whoAmI());
private final LargeScaleIndex lsi;
private final RealTimeIndex rti;
private final Suggestor suggestor;
private final Promoter promoter;
private final BoostsManager boostsManager;
public Blender(LargeScaleIndex lsi, RealTimeIndex rti, Suggestor suggestor, Promoter promoter, BoostsManager boostsManager) {
Preconditions.checkNotNull(lsi);
Preconditions.checkNotNull(rti);
Preconditions.checkNotNull(promoter);
Preconditions.checkNotNull(suggestor);
Preconditions.checkNotNull(boostsManager);
this.lsi = lsi;
this.rti = rti;
this.suggestor = suggestor;
this.promoter = promoter;
this.boostsManager = boostsManager;
};
private QueryMatcher getSearcher() {
QueryMatcher matcher = new BlendingQueryMatcher(lsi, rti.getSearchSession());
matcher = new BlendingQueryMatcher(matcher, promoter);
return matcher;
}
@Override
public TopMatches findMatches(Query query, Predicate<DocId> docFilter, int limit, int scoringFunctionIndex) throws InterruptedException {
TopMatches retVal = getSearcher().findMatches(query, docFilter, limit, scoringFunctionIndex);
suggestor.noteQuery(query, retVal.getTotalMatches());
return retVal;
}
@Override
public TopMatches findMatches(Query query, int limit, int scoringFunctionIndex) throws InterruptedException {
Preconditions.checkNotNull(query);
Preconditions.checkArgument(limit > 0);
TopMatches retVal = getSearcher().findMatches(query, limit, scoringFunctionIndex);
suggestor.noteQuery(query, retVal.getTotalMatches());
return retVal;
}
@Override
public boolean hasChanges(DocId docid) throws InterruptedException {
return getSearcher().hasChanges(docid);
}
@Override
public SearchResults search(Query query, int start, int limit, int scoringFunctionIndex, Map<String, String> extraParameters) throws InterruptedException {
TopMatches matches = this.findMatches(query, start+limit, scoringFunctionIndex);
Iterable<ScoredMatch> ids = matches;
// apply pagination
ids = SkippingIterable.skipping(ids, start);
ids = CollectionsUtil.limit(ids, limit);
// base transform function
final Function<ScoredMatch, SearchResult> baseTransform = ScoredMatch.SEARCH_RESULT_FUNCTION;
Function<ScoredMatch, SearchResult> transformFunction = baseTransform;
String fetchCategories = extraParameters.get("fetch_categories");
String fetchVariables = extraParameters.get("fetch_variables");
// adds fetch variables to the transform function
if ("*".equals(fetchVariables) || "true".equalsIgnoreCase(fetchVariables)) {
transformFunction = new Function<ScoredMatch, SearchResult>() {
@Override
public SearchResult apply(ScoredMatch scoredMatch) {
SearchResult searchResult = baseTransform.apply(scoredMatch);
searchResult.setVariables(boostsManager.getVariablesAsMap(scoredMatch.getDocId()));
return searchResult;
}
};
}
// adds fetch categories to the transform function
final Function<ScoredMatch, SearchResult> prevTransform = transformFunction;
if ("*".equals(fetchCategories) || "true".equalsIgnoreCase(fetchCategories)) {
transformFunction = new Function<ScoredMatch, SearchResult>() {
@Override
public SearchResult apply(ScoredMatch scoredMatch) {
SearchResult searchResult = prevTransform.apply(scoredMatch);
searchResult.setCategories(boostsManager.getCategoryValues(scoredMatch.getDocId()));
return searchResult;
}
};
}
// convert to search results
Iterable<SearchResult> results = Iterables.transform(ids, transformFunction);
// fix'em in a list
results = Lists.newArrayList(results);
return new SearchResults(results, matches.getTotalMatches(), matches.getFacetingResults());
}
@Override
public int countMatches(Query query) throws InterruptedException {
return getSearcher().countMatches(query);
}
@Override
public int countMatches(Query query, Predicate<DocId> idFilter) throws InterruptedException {
return getSearcher().countMatches(query, idFilter);
}
}