/**
* 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 org.apache.lucene.document.*;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.TermDocs;
import org.apache.lucene.index.TermEnum;
import org.apache.lucene.search.*;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.common.util.SimpleOrderedMap;
import org.apache.solr.core.SolrConfig;
import org.apache.solr.core.SolrCore;
import org.apache.solr.core.SolrInfoMBean;
import org.apache.solr.schema.IndexSchema;
import org.apache.solr.schema.SchemaField;
import org.apache.solr.request.UnInvertedField;
import org.apache.lucene.util.OpenBitSet;
import java.io.IOException;
import java.net.URL;
import java.util.*;
import java.util.concurrent.atomic.AtomicLong;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* SolrIndexSearcher adds schema awareness and caching functionality
* over the lucene IndexSearcher.
*
* @version $Id: SolrIndexSearcher.java 1137067 2011-06-17 22:59:36Z mvg $
* @since solr 0.9
*/
public class SolrIndexSearcher extends IndexSearcher implements SolrInfoMBean {
// These should *only* be used for debugging or monitoring purposes
public static final AtomicLong numOpens = new AtomicLong();
public static final AtomicLong numCloses = new AtomicLong();
private static Logger log = LoggerFactory.getLogger(SolrIndexSearcher.class);
private final SolrCore core;
private final IndexSchema schema;
private String indexDir;
private final String name;
private long openTime = System.currentTimeMillis();
private long registerTime = 0;
private long warmupTime = 0;
private final SolrIndexReader reader;
private final boolean closeReader;
private final int queryResultWindowSize;
private final int queryResultMaxDocsCached;
private final boolean useFilterForSortedQuery;
public final boolean enableLazyFieldLoading;
private final boolean cachingEnabled;
private final SolrCache<Query,DocSet> filterCache;
private final SolrCache<QueryResultKey,DocList> queryResultCache;
private final SolrCache<Integer,Document> documentCache;
private final SolrCache<String,Object> fieldValueCache;
private final LuceneQueryOptimizer optimizer;
// map of generic caches - not synchronized since it's read-only after the constructor.
private final HashMap<String, SolrCache> cacheMap;
private static final HashMap<String, SolrCache> noGenericCaches=new HashMap<String,SolrCache>(0);
// list of all caches associated with this searcher.
private final SolrCache[] cacheList;
private static final SolrCache[] noCaches = new SolrCache[0];
private final Collection<String> fieldNames;
private Collection<String> storedHighlightFieldNames;
/** Creates a searcher searching the index in the named directory.
*
* @deprecated use alternate constructor
*/
@Deprecated
public SolrIndexSearcher(SolrCore core, IndexSchema schema, String name, String path, boolean enableCache) throws IOException {
this(core, schema,name, core.getIndexReaderFactory().newReader(core.getDirectoryFactory().open(path), false), true, enableCache);
}
/*
* Creates a searcher searching the index in the provided directory. Note:
* uses the main IndexReaderFactory for the specified SolrCore.
*
* @see SolrCore#getMainIndexReaderFactory
*/
public SolrIndexSearcher(SolrCore core, IndexSchema schema, String name,
Directory directory, boolean enableCache) throws IOException {
this(core, schema,name, core.getIndexReaderFactory().newReader(directory, false), true, enableCache);
}
/** Creates a searcher searching the index in the provided directory. */
public SolrIndexSearcher(SolrCore core, IndexSchema schema, String name, Directory directory, boolean readOnly, boolean enableCache) throws IOException {
this(core, schema,name, core.getIndexReaderFactory().newReader(directory, readOnly), true, enableCache);
}
/** Creates a searcher searching the provided index. */
public SolrIndexSearcher(SolrCore core, IndexSchema schema, String name, IndexReader r, boolean enableCache) {
this(core, schema,name,r, false, enableCache);
}
private static SolrIndexReader wrap(IndexReader r) {
SolrIndexReader sir;
// wrap the reader
if (!(r instanceof SolrIndexReader)) {
sir = new SolrIndexReader(r, null, 0);
sir.associateInfo(null);
} else {
sir = (SolrIndexReader)r;
}
return sir;
}
public SolrIndexSearcher(SolrCore core, IndexSchema schema, String name, IndexReader r, boolean closeReader, boolean enableCache) {
super(wrap(r));
this.reader = (SolrIndexReader)super.getIndexReader();
this.core = core;
this.schema = schema;
this.name = "Searcher@" + Integer.toHexString(hashCode()) + (name!=null ? " "+name : "");
log.info("Opening " + this.name);
SolrIndexReader.setSearcher(reader, this);
if (r.directory() instanceof FSDirectory) {
FSDirectory fsDirectory = (FSDirectory) r.directory();
indexDir = fsDirectory.getDirectory().getAbsolutePath();
}
this.closeReader = closeReader;
setSimilarity(schema.getSimilarity());
SolrConfig solrConfig = core.getSolrConfig();
queryResultWindowSize = solrConfig.queryResultWindowSize;
queryResultMaxDocsCached = solrConfig.queryResultMaxDocsCached;
useFilterForSortedQuery = solrConfig.useFilterForSortedQuery;
enableLazyFieldLoading = solrConfig.enableLazyFieldLoading;
cachingEnabled=enableCache;
if (cachingEnabled) {
ArrayList<SolrCache> clist = new ArrayList<SolrCache>();
fieldValueCache = solrConfig.fieldValueCacheConfig==null ? null : solrConfig.fieldValueCacheConfig.newInstance();
if (fieldValueCache!=null) clist.add(fieldValueCache);
filterCache= solrConfig.filterCacheConfig==null ? null : solrConfig.filterCacheConfig.newInstance();
if (filterCache!=null) clist.add(filterCache);
queryResultCache = solrConfig.queryResultCacheConfig==null ? null : solrConfig.queryResultCacheConfig.newInstance();
if (queryResultCache!=null) clist.add(queryResultCache);
documentCache = solrConfig.documentCacheConfig==null ? null : solrConfig.documentCacheConfig.newInstance();
if (documentCache!=null) clist.add(documentCache);
if (solrConfig.userCacheConfigs == null) {
cacheMap = noGenericCaches;
} else {
cacheMap = new HashMap<String,SolrCache>(solrConfig.userCacheConfigs.length);
for (CacheConfig userCacheConfig : solrConfig.userCacheConfigs) {
SolrCache cache = null;
if (userCacheConfig != null) cache = userCacheConfig.newInstance();
if (cache != null) {
cacheMap.put(cache.name(), cache);
clist.add(cache);
}
}
}
cacheList = clist.toArray(new SolrCache[clist.size()]);
} else {
filterCache=null;
queryResultCache=null;
documentCache=null;
fieldValueCache=null;
cacheMap = noGenericCaches;
cacheList= noCaches;
}
optimizer = solrConfig.filtOptEnabled ? new LuceneQueryOptimizer(solrConfig.filtOptCacheSize,solrConfig.filtOptThreshold) : null;
fieldNames = r.getFieldNames(IndexReader.FieldOption.ALL);
// do this at the end since an exception in the constructor means we won't close
numOpens.incrementAndGet();
}
@Override
public String toString() {
return name;
}
/** Register sub-objects such as caches
*/
public void register() {
// register self
core.getInfoRegistry().put("searcher", this);
core.getInfoRegistry().put(name, this);
for (SolrCache cache : cacheList) {
cache.setState(SolrCache.State.LIVE);
core.getInfoRegistry().put(cache.name(), cache);
}
registerTime=System.currentTimeMillis();
}
/**
* Free's resources associated with this searcher.
*
* In particular, the underlying reader and any cache's in use are closed.
*/
@Override
public void close() throws IOException {
if (cachingEnabled) {
StringBuilder sb = new StringBuilder();
sb.append("Closing ").append(name);
for (SolrCache cache : cacheList) {
sb.append("\n\t");
sb.append(cache);
}
log.info(sb.toString());
} else {
log.debug("Closing " + name);
}
core.getInfoRegistry().remove(name);
// super.close();
// can't use super.close() since it just calls reader.close() and that may only be called once
// per reader (even if incRef() was previously called).
if (closeReader) reader.decRef();
for (SolrCache cache : cacheList) {
cache.close();
}
// do this at the end so it only gets done if there are no exceptions
numCloses.incrementAndGet();
}
/** Direct access to the IndexReader used by this searcher */
public SolrIndexReader getReader() { return reader; }
/** Direct access to the IndexSchema for use with this searcher */
public IndexSchema getSchema() { return schema; }
/**
* Returns a collection of all field names the index reader knows about.
*/
public Collection<String> getFieldNames() {
return fieldNames;
}
/**
* Returns a collection of the names of all stored fields which can be
* highlighted the index reader knows about.
*/
public Collection<String> getStoredHighlightFieldNames() {
if (storedHighlightFieldNames == null) {
storedHighlightFieldNames = new LinkedList<String>();
for (String fieldName : fieldNames) {
try {
SchemaField field = schema.getField(fieldName);
if (field.stored() &&
((field.getType() instanceof org.apache.solr.schema.TextField) ||
(field.getType() instanceof org.apache.solr.schema.StrField))) {
storedHighlightFieldNames.add(fieldName);
}
} catch (RuntimeException e) { // getField() throws a SolrException, but it arrives as a RuntimeException
log.warn("Field \"" + fieldName + "\" found in index, but not defined in schema.");
}
}
}
return storedHighlightFieldNames;
}
//
// Set default regenerators on filter and query caches if they don't have any
//
public static void initRegenerators(SolrConfig solrConfig) {
if (solrConfig.fieldValueCacheConfig != null && solrConfig.fieldValueCacheConfig.getRegenerator() == null) {
solrConfig.fieldValueCacheConfig.setRegenerator(
new CacheRegenerator() {
public boolean regenerateItem(SolrIndexSearcher newSearcher, SolrCache newCache, SolrCache oldCache, Object oldKey, Object oldVal) throws IOException {
if (oldVal instanceof UnInvertedField) {
UnInvertedField.getUnInvertedField((String)oldKey, newSearcher);
}
return true;
}
}
);
}
if (solrConfig.filterCacheConfig != null && solrConfig.filterCacheConfig.getRegenerator() == null) {
solrConfig.filterCacheConfig.setRegenerator(
new CacheRegenerator() {
public boolean regenerateItem(SolrIndexSearcher newSearcher, SolrCache newCache, SolrCache oldCache, Object oldKey, Object oldVal) throws IOException {
newSearcher.cacheDocSet((Query)oldKey, null, false);
return true;
}
}
);
}
if (solrConfig.queryResultCacheConfig != null && solrConfig.queryResultCacheConfig.getRegenerator() == null) {
final int queryResultWindowSize = solrConfig.queryResultWindowSize;
solrConfig.queryResultCacheConfig.setRegenerator(
new CacheRegenerator() {
public boolean regenerateItem(SolrIndexSearcher newSearcher, SolrCache newCache, SolrCache oldCache, Object oldKey, Object oldVal) throws IOException {
QueryResultKey key = (QueryResultKey)oldKey;
int nDocs=1;
// request 1 doc and let caching round up to the next window size...
// unless the window size is <=1, in which case we will pick
// the minimum of the number of documents requested last time and
// a reasonable number such as 40.
// TODO: make more configurable later...
if (queryResultWindowSize<=1) {
DocList oldList = (DocList)oldVal;
int oldnDocs = oldList.offset() + oldList.size();
// 40 has factors of 2,4,5,10,20
nDocs = Math.min(oldnDocs,40);
}
int flags=NO_CHECK_QCACHE | key.nc_flags;
QueryCommand qc = new QueryCommand();
qc.setQuery(key.query)
.setFilterList(key.filters)
.setSort(key.sort)
.setLen(nDocs)
.setSupersetMaxDoc(nDocs)
.setFlags(flags);
QueryResult qr = new QueryResult();
newSearcher.getDocListC(qr,qc);
return true;
}
}
);
}
}
public QueryResult search(QueryResult qr, QueryCommand cmd) throws IOException {
getDocListC(qr,cmd);
return qr;
}
// public Hits search(Query query, Filter filter, Sort sort) throws IOException {
// // todo - when Solr starts accepting filters, need to
// // change this conditional check (filter!=null) and create a new filter
// // that ANDs them together if it already exists.
//
// if (optimizer==null || filter!=null || !(query instanceof BooleanQuery)
// ) {
// return super.search(query,filter,sort);
// } else {
// Query[] newQuery = new Query[1];
// Filter[] newFilter = new Filter[1];
// optimizer.optimize((BooleanQuery)query, this, 0, newQuery, newFilter);
//
// return super.search(newQuery[0], newFilter[0], sort);
// }
// }
/**
* @return the indexDir on which this searcher is opened
* @see #SolrIndexSearcher(SolrCore, IndexSchema, String, Directory, boolean)
*/
public String getIndexDir() {
return indexDir;
}
/* ********************** Document retrieval *************************/
/* Future optimizations (yonik)
*
* If no cache is present:
* - use NO_LOAD instead of LAZY_LOAD
* - use LOAD_AND_BREAK if a single field is begin retrieved
*/
/**
* FieldSelector which loads the specified fields, and load all other
* field lazily.
*/
static class SetNonLazyFieldSelector implements FieldSelector {
private Set<String> fieldsToLoad;
SetNonLazyFieldSelector(Set<String> toLoad) {
fieldsToLoad = toLoad;
}
public FieldSelectorResult accept(String fieldName) {
if(fieldsToLoad.contains(fieldName))
return FieldSelectorResult.LOAD;
else
return FieldSelectorResult.LAZY_LOAD;
}
}
/**
* Retrieve the {@link Document} instance corresponding to the document id.
*/
@Override
public Document doc(int i) throws IOException {
return doc(i, (Set<String>)null);
}
/** Retrieve a {@link Document} using a {@link org.apache.lucene.document.FieldSelector}
* This method does not currently use the Solr document cache.
*
* @see IndexReader#document(int, FieldSelector) */
@Override
public Document doc(int n, FieldSelector fieldSelector) throws IOException {
return getIndexReader().document(n, fieldSelector);
}
/**
* Retrieve the {@link Document} instance corresponding to the document id.
*
* Note: The document will have all fields accessable, but if a field
* filter is provided, only the provided fields will be loaded (the
* remainder will be available lazily).
*/
public Document doc(int i, Set<String> fields) throws IOException {
Document d;
if (documentCache != null) {
d = documentCache.get(i);
if (d!=null) return d;
}
if(!enableLazyFieldLoading || fields == null) {
d = getIndexReader().document(i);
} else {
d = getIndexReader().document(i,
new SetNonLazyFieldSelector(fields));
}
if (documentCache != null) {
documentCache.put(i, d);
}
return d;
}
/**
* Takes a list of docs (the doc ids actually), and reads them into an array
* of Documents.
*/
public void readDocs(Document[] docs, DocList ids) throws IOException {
readDocs(docs, ids, null);
}
/**
* Takes a list of docs (the doc ids actually) and a set of fields to load,
* and reads them into an array of Documents.
*/
public void readDocs(Document[] docs, DocList ids, Set<String> fields) throws IOException {
DocIterator iter = ids.iterator();
for (int i=0; i<docs.length; i++) {
docs[i] = doc(iter.nextDoc(), fields);
}
}
/* ********************** end document retrieval *************************/
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
/** expert: internal API, subject to change */
public SolrCache getFieldValueCache() {
return fieldValueCache;
}
/** Returns a weighted sort according to this searcher */
public Sort weightSort(Sort sort) throws IOException {
if (sort == null) return null;
SortField[] sorts = sort.getSort();
boolean needsWeighting = false;
for (SortField sf : sorts) {
if (sf instanceof SolrSortField) {
needsWeighting = true;
break;
}
}
if (!needsWeighting) return sort;
SortField[] newSorts = sorts.clone();
for (int i=0; i<newSorts.length; i++) {
if (newSorts[i] instanceof SolrSortField) {
newSorts[i] = ((SolrSortField)newSorts[i]).weight(this);
}
}
return new Sort(newSorts);
}
/**
* Returns the first document number containing the term <code>t</code>
* Returns -1 if no document was found.
* This method is primarily intended for clients that want to fetch
* documents using a unique identifier."
* @param t
* @return the first document number containing the term
*/
public int getFirstMatch(Term t) throws IOException {
TermDocs tdocs = null;
try {
tdocs = reader.termDocs(t);
if (!tdocs.next()) return -1;
return tdocs.doc();
} finally {
if (tdocs!=null) tdocs.close();
}
}
/**
* Compute and cache the DocSet that matches a query.
* The normal usage is expected to be cacheDocSet(myQuery, null,false)
* meaning that Solr will determine if the Query warrants caching, and
* if so, will compute the DocSet that matches the Query and cache it.
* If the answer to the query is already cached, nothing further will be done.
* <p>
* If the optionalAnswer DocSet is provided, it should *not* be modified
* after this call.
*
* @param query the lucene query that will act as the key
* @param optionalAnswer the DocSet to be cached - if null, it will be computed.
* @param mustCache if true, a best effort will be made to cache this entry.
* if false, heuristics may be used to determine if it should be cached.
*/
public void cacheDocSet(Query query, DocSet optionalAnswer, boolean mustCache) throws IOException {
// Even if the cache is null, still compute the DocSet as it may serve to warm the Lucene
// or OS disk cache.
if (optionalAnswer != null) {
if (filterCache!=null) {
filterCache.put(query,optionalAnswer);
}
return;
}
// Throw away the result, relying on the fact that getDocSet
// will currently always cache what it found. If getDocSet() starts
// using heuristics about what to cache, and mustCache==true, (or if we
// want this method to start using heuristics too) then
// this needs to change.
getDocSet(query);
}
/**
* Returns the set of document ids matching a query.
* This method is cache-aware and attempts to retrieve the answer from the cache if possible.
* If the answer was not cached, it may have been inserted into the cache as a result of this call.
* This method can handle negative queries.
* <p>
* The DocSet returned should <b>not</b> be modified.
*/
public DocSet getDocSet(Query query) throws IOException {
// Get the absolute value (positive version) of this query. If we
// get back the same reference, we know it's positive.
Query absQ = QueryUtils.getAbs(query);
boolean positive = query==absQ;
if (filterCache != null) {
DocSet absAnswer = filterCache.get(absQ);
if (absAnswer!=null) {
if (positive) return absAnswer;
else return getPositiveDocSet(matchAllDocsQuery).andNot(absAnswer);
}
}
DocSet absAnswer = getDocSetNC(absQ, null);
DocSet answer = positive ? absAnswer : getPositiveDocSet(matchAllDocsQuery).andNot(absAnswer);
if (filterCache != null) {
// cache negative queries as positive
filterCache.put(absQ, absAnswer);
}
return answer;
}
// only handle positive (non negative) queries
DocSet getPositiveDocSet(Query q) throws IOException {
DocSet answer;
if (filterCache != null) {
answer = filterCache.get(q);
if (answer!=null) return answer;
}
answer = getDocSetNC(q,null);
if (filterCache != null) filterCache.put(q,answer);
return answer;
}
// only handle positive (non negative) queries
/** @lucene.internal */
public DocSet getPositiveDocSet(Query q, TermDocsState tdState) throws IOException {
DocSet answer;
if (filterCache != null) {
answer = filterCache.get(q);
if (answer!=null) return answer;
}
answer = getDocSetNC(q, null, tdState);
if (filterCache != null) filterCache.put(q,answer);
return answer;
}
private static Query matchAllDocsQuery = new MatchAllDocsQuery();
/**
* Returns the set of document ids matching all queries.
* This method is cache-aware and attempts to retrieve the answer from the cache if possible.
* If the answer was not cached, it may have been inserted into the cache as a result of this call.
* This method can handle negative queries.
* <p>
* The DocSet returned should <b>not</b> be modified.
*/
public DocSet getDocSet(List<Query> queries) throws IOException {
if (queries==null) return null;
if (queries.size()==1) return getDocSet(queries.get(0));
DocSet answer=null;
boolean[] neg = new boolean[queries.size()];
DocSet[] sets = new DocSet[queries.size()];
int smallestIndex = -1;
int smallestCount = Integer.MAX_VALUE;
for (int i=0; i<sets.length; i++) {
Query q = queries.get(i);
Query posQuery = QueryUtils.getAbs(q);
sets[i] = getPositiveDocSet(posQuery);
// Negative query if absolute value different from original
if (q==posQuery) {
neg[i] = false;
// keep track of the smallest positive set.
// This optimization is only worth it if size() is cached, which it would
// be if we don't do any set operations.
int sz = sets[i].size();
if (sz<smallestCount) {
smallestCount=sz;
smallestIndex=i;
answer = sets[i];
}
} else {
neg[i] = true;
}
}
// if no positive queries, start off with all docs
if (answer==null) answer = getPositiveDocSet(matchAllDocsQuery);
// do negative queries first to shrink set size
for (int i=0; i<sets.length; i++) {
if (neg[i]) answer = answer.andNot(sets[i]);
}
for (int i=0; i<sets.length; i++) {
if (!neg[i] && i!=smallestIndex) answer = answer.intersection(sets[i]);
}
return answer;
}
Filter getFilter(Query q) throws IOException {
if (q == null) return null;
// TODO: support pure negative queries?
// if (q instanceof) {
// }
return getDocSet(q).getTopFilter();
}
Filter getFilter(DocSet setFilter, List<Query> queries) throws IOException {
Filter answer = setFilter == null ? null : setFilter.getTopFilter();
if (queries == null || queries.size() == 0) {
return answer;
}
if (answer == null && queries.size() == 1) {
return getFilter(queries.get(0));
}
DocSet finalSet=null;
int nDocSets =0;
boolean[] neg = new boolean[queries.size()];
DocSet[] sets = new DocSet[queries.size()];
Query[] nocache = new Query[queries.size()];
int smallestIndex = -1;
int smallestCount = Integer.MAX_VALUE;
for (Query q : queries) {
// if (q instanceof)
Query posQuery = QueryUtils.getAbs(q);
sets[nDocSets] = getPositiveDocSet(posQuery);
// Negative query if absolute value different from original
if (q==posQuery) {
neg[nDocSets] = false;
// keep track of the smallest positive set.
// This optimization is only worth it if size() is cached, which it would
// be if we don't do any set operations.
int sz = sets[nDocSets].size();
if (sz<smallestCount) {
smallestCount=sz;
smallestIndex=nDocSets;
finalSet = sets[nDocSets];
}
} else {
neg[nDocSets] = true;
}
nDocSets++;
}
// if no positive queries, start off with all docs
if (finalSet==null) finalSet = getPositiveDocSet(matchAllDocsQuery);
// do negative queries first to shrink set size
for (int i=0; i<sets.length; i++) {
if (neg[i]) finalSet = finalSet.andNot(sets[i]);
}
for (int i=0; i<sets.length; i++) {
if (!neg[i] && i!=smallestIndex) finalSet = finalSet.intersection(sets[i]);
}
return finalSet.getTopFilter();
}
// query must be positive
protected DocSet getDocSetNC(Query query, DocSet filter) throws IOException {
DocSetCollector collector = new DocSetCollector(maxDoc()>>6, maxDoc());
if (filter==null) {
if (query instanceof TermQuery) {
Term t = ((TermQuery)query).getTerm();
SolrIndexReader[] readers = reader.getLeafReaders();
int[] offsets = reader.getLeafOffsets();
int[] arr = new int[256];
int[] freq = new int[256];
for (int i=0; i<readers.length; i++) {
SolrIndexReader sir = readers[i];
int offset = offsets[i];
collector.setNextReader(sir, offset);
TermDocs tdocs = sir.termDocs(t);
for(;;) {
int num = tdocs.read(arr, freq);
if (num==0) break;
for (int j=0; j<num; j++) {
collector.collect(arr[j]);
}
}
tdocs.close();
}
} else {
super.search(query,null,collector);
}
return collector.getDocSet();
} else {
Filter luceneFilter = filter.getTopFilter();
super.search(query, luceneFilter, collector);
return collector.getDocSet();
}
}
/** @lucene.internal */
public static class TermDocsState {
public TermEnum tenum;
public TermDocs tdocs;
}
// query must be positive
protected DocSet getDocSetNC(Query query, DocSet filter, TermDocsState tdState) throws IOException {
int smallSetSize = maxDoc()>>6;
int largestPossible = tdState.tenum.docFreq();
int[] docs = new int[Math.min(smallSetSize, largestPossible)];
OpenBitSet obs = null;
int upto=0;
int numBits = 0;
if (tdState.tdocs == null) {
tdState.tdocs = reader.termDocs();
}
tdState.tdocs.seek(tdState.tenum);
int[] arr = new int[Math.min(largestPossible, 256)];
int[] freq = new int[arr.length];
for(;;) {
int num = tdState.tdocs.read(arr, freq);
if (num==0) break;
if (upto + num > docs.length) {
if (obs == null) obs = new OpenBitSet(maxDoc());
for (int i = 0; i<num; i++) {
obs.fastSet(arr[i]);
}
numBits += num;
} else {
System.arraycopy(arr, 0, docs, upto, num);
upto += num;
}
}
if (obs != null) {
for (int i=0; i<upto; i++) {
obs.fastSet(docs[i]);
}
numBits += upto;
return new BitDocSet(obs, numBits);
}
return new SortedIntDocSet(docs, upto);
}
/**
* Returns the set of document ids matching both the query and the filter.
* This method is cache-aware and attempts to retrieve the answer from the cache if possible.
* If the answer was not cached, it may have been inserted into the cache as a result of this call.
* <p>
*
* @param query
* @param filter may be null
* @return DocSet meeting the specified criteria, should <b>not</b> be modified by the caller.
*/
public DocSet getDocSet(Query query, DocSet filter) throws IOException {
if (filter==null) return getDocSet(query);
// Negative query if absolute value different from original
Query absQ = QueryUtils.getAbs(query);
boolean positive = absQ==query;
DocSet first;
if (filterCache != null) {
first = filterCache.get(absQ);
if (first==null) {
first = getDocSetNC(absQ,null);
filterCache.put(absQ,first);
}
return positive ? first.intersection(filter) : filter.andNot(first);
}
// If there isn't a cache, then do a single filtered query if positive.
return positive ? getDocSetNC(absQ,filter) : filter.andNot(getPositiveDocSet(absQ));
}
/**
* Converts a filter into a DocSet.
* This method is not cache-aware and no caches are checked.
*/
public DocSet convertFilter(Filter lfilter) throws IOException {
DocIdSet docSet = lfilter.getDocIdSet(this.reader);
OpenBitSet obs = new OpenBitSet();
DocIdSetIterator it = docSet.iterator();
int doc;
while((doc = it.nextDoc()) != DocIdSetIterator.NO_MORE_DOCS) {
obs.fastSet(doc);
}
return new BitDocSet(obs);
}
/**
* Returns documents matching both <code>query</code> and <code>filter</code>
* and sorted by <code>sort</code>.
* <p>
* This method is cache aware and may retrieve <code>filter</code> from
* the cache or make an insertion into the cache as a result of this call.
* <p>
* FUTURE: The returned DocList may be retrieved from a cache.
*
* @param query
* @param filter may be null
* @param lsort criteria by which to sort (if null, query relevance is used)
* @param offset offset into the list of documents to return
* @param len maximum number of documents to return
* @return DocList meeting the specified criteria, should <b>not</b> be modified by the caller.
* @throws IOException
*/
public DocList getDocList(Query query, Query filter, Sort lsort, int offset, int len) throws IOException {
QueryCommand qc = new QueryCommand();
qc.setQuery(query)
.setFilterList(filter)
.setSort(lsort)
.setOffset(offset)
.setLen(len);
QueryResult qr = new QueryResult();
search(qr,qc);
return qr.getDocList();
}
/**
* Returns documents matching both <code>query</code> and the
* intersection of the <code>filterList</code>, sorted by <code>sort</code>.
* <p>
* This method is cache aware and may retrieve <code>filter</code> from
* the cache or make an insertion into the cache as a result of this call.
* <p>
* FUTURE: The returned DocList may be retrieved from a cache.
*
* @param query
* @param filterList may be null
* @param lsort criteria by which to sort (if null, query relevance is used)
* @param offset offset into the list of documents to return
* @param len maximum number of documents to return
* @return DocList meeting the specified criteria, should <b>not</b> be modified by the caller.
* @throws IOException
*/
public DocList getDocList(Query query, List<Query> filterList, Sort lsort, int offset, int len, int flags) throws IOException {
QueryCommand qc = new QueryCommand();
qc.setQuery(query)
.setFilterList(filterList)
.setSort(lsort)
.setOffset(offset)
.setLen(len)
.setFlags(flags);
QueryResult qr = new QueryResult();
search(qr,qc);
return qr.getDocList();
}
private static final int NO_CHECK_QCACHE = 0x80000000;
public static final int GET_DOCSET = 0x40000000;
private static final int NO_CHECK_FILTERCACHE = 0x20000000;
public static final int GET_DOCLIST = 0x02;
public static final int GET_SCORES = 0x01;
/**
* getDocList version that uses+populates query and filter caches.
* In the event of a timeout, the cache is not populated.
*/
private void getDocListC(QueryResult qr, QueryCommand cmd) throws IOException {
// old parameters: DocListAndSet out, Query query, List<Query> filterList, DocSet filter, Sort lsort, int offset, int len, int flags, long timeAllowed, NamedList<Object> responseHeader
DocListAndSet out = new DocListAndSet();
qr.setDocListAndSet(out);
QueryResultKey key=null;
int maxDocRequested = cmd.getOffset() + cmd.getLen();
// check for overflow, and check for # docs in index
if (maxDocRequested < 0 || maxDocRequested > maxDoc()) maxDocRequested = maxDoc();
int supersetMaxDoc= maxDocRequested;
DocList superset;
// we can try and look up the complete query in the cache.
// we can't do that if filter!=null though (we don't want to
// do hashCode() and equals() for a big DocSet).
if (queryResultCache != null && cmd.getFilter()==null) {
// all of the current flags can be reused during warming,
// so set all of them on the cache key.
key = new QueryResultKey(cmd.getQuery(), cmd.getFilterList(), cmd.getSort(), cmd.getFlags());
if ((cmd.getFlags() & NO_CHECK_QCACHE)==0) {
superset = queryResultCache.get(key);
if (superset != null) {
// check that the cache entry has scores recorded if we need them
if ((cmd.getFlags() & GET_SCORES)==0 || superset.hasScores()) {
// NOTE: subset() returns null if the DocList has fewer docs than
// requested
out.docList = superset.subset(cmd.getOffset(),cmd.getLen());
}
}
if (out.docList != null) {
// found the docList in the cache... now check if we need the docset too.
// OPT: possible future optimization - if the doclist contains all the matches,
// use it to make the docset instead of rerunning the query.
if (out.docSet==null && ((cmd.getFlags() & GET_DOCSET)!=0) ) {
if (cmd.getFilterList()==null) {
out.docSet = getDocSet(cmd.getQuery());
} else {
List<Query> newList = new ArrayList<Query>(cmd.getFilterList()
.size()+1);
newList.add(cmd.getQuery());
newList.addAll(cmd.getFilterList());
out.docSet = getDocSet(newList);
}
}
return;
}
}
// If we are going to generate the result, bump up to the
// next resultWindowSize for better caching.
// handle 0 special case as well as avoid idiv in the common case.
if (maxDocRequested < queryResultWindowSize) {
supersetMaxDoc=queryResultWindowSize;
} else {
supersetMaxDoc = ((maxDocRequested -1)/queryResultWindowSize + 1)*queryResultWindowSize;
if (supersetMaxDoc < 0) supersetMaxDoc=maxDocRequested;
}
}
// OK, so now we need to generate an answer.
// One way to do that would be to check if we have an unordered list
// of results for the base query. If so, we can apply the filters and then
// sort by the resulting set. This can only be used if:
// - the sort doesn't contain score
// - we don't want score returned.
// check if we should try and use the filter cache
boolean useFilterCache=false;
if ((cmd.getFlags() & (GET_SCORES|NO_CHECK_FILTERCACHE))==0 && useFilterForSortedQuery && cmd.getSort() != null && filterCache != null) {
useFilterCache=true;
SortField[] sfields = cmd.getSort().getSort();
for (SortField sf : sfields) {
if (sf.getType() == SortField.SCORE) {
useFilterCache=false;
break;
}
}
}
// disable useFilterCache optimization temporarily
if (useFilterCache) {
// now actually use the filter cache.
// for large filters that match few documents, this may be
// slower than simply re-executing the query.
if (out.docSet == null) {
out.docSet = getDocSet(cmd.getQuery(),cmd.getFilter());
DocSet bigFilt = getDocSet(cmd.getFilterList());
if (bigFilt != null) out.docSet = out.docSet.intersection(bigFilt);
}
// todo: there could be a sortDocSet that could take a list of
// the filters instead of anding them first...
// perhaps there should be a multi-docset-iterator
superset = sortDocSet(out.docSet,cmd.getSort(),supersetMaxDoc);
out.docList = superset.subset(cmd.getOffset(),cmd.getLen());
} else {
// do it the normal way...
cmd.setSupersetMaxDoc(supersetMaxDoc);
if ((cmd.getFlags() & GET_DOCSET)!=0) {
// this currently conflates returning the docset for the base query vs
// the base query and all filters.
DocSet qDocSet = getDocListAndSetNC(qr,cmd);
// cache the docSet matching the query w/o filtering
if (qDocSet!=null && filterCache!=null && !qr.isPartialResults()) filterCache.put(cmd.getQuery(),qDocSet);
} else {
getDocListNC(qr,cmd);
//Parameters: cmd.getQuery(),theFilt,cmd.getSort(),0,supersetMaxDoc,cmd.getFlags(),cmd.getTimeAllowed(),responseHeader);
}
superset = out.docList;
out.docList = superset.subset(cmd.getOffset(),cmd.getLen());
}
// lastly, put the superset in the cache if the size is less than or equal
// to queryResultMaxDocsCached
if (key != null && superset.size() <= queryResultMaxDocsCached && !qr.isPartialResults()) {
queryResultCache.put(key, superset);
}
}
private void getDocListNC(QueryResult qr,QueryCommand cmd) throws IOException {
//Parameters: cmd.getQuery(),theFilt,cmd.getSort(),0,supersetMaxDoc,cmd.getFlags(),cmd.getTimeAllowed(),responseHeader);
//Query query, DocSet filter, Sort lsort, int offset, int len, int flags, long timeAllowed, NamedList<Object> responseHeader
DocSet filter = cmd.getFilter()!=null ? cmd.getFilter() : getDocSet(cmd.getFilterList());
final long timeAllowed = cmd.getTimeAllowed();
int len = cmd.getSupersetMaxDoc();
int last = len;
if (last < 0 || last > maxDoc()) last=maxDoc();
final int lastDocRequested = last;
int nDocsReturned;
int totalHits;
float maxScore;
int[] ids;
float[] scores;
boolean needScores = (cmd.getFlags() & GET_SCORES) != 0;
Query query = QueryUtils.makeQueryable(cmd.getQuery());
final Filter luceneFilter = filter==null ? null : filter.getTopFilter();
// handle zero case...
if (lastDocRequested<=0) {
final float[] topscore = new float[] { Float.NEGATIVE_INFINITY };
final int[] numHits = new int[1];
Collector collector;
if (!needScores) {
collector = new Collector () {
@Override
public void setScorer(Scorer scorer) throws IOException {
}
@Override
public void collect(int doc) throws IOException {
numHits[0]++;
}
@Override
public void setNextReader(IndexReader reader, int docBase) throws IOException {
}
@Override
public boolean acceptsDocsOutOfOrder() {
return true;
}
};
} else {
collector = new Collector() {
Scorer scorer;
@Override
public void setScorer(Scorer scorer) throws IOException {
this.scorer = scorer;
}
@Override
public void collect(int doc) throws IOException {
numHits[0]++;
float score = scorer.score();
if (score > topscore[0]) topscore[0]=score;
}
@Override
public void setNextReader(IndexReader reader, int docBase) throws IOException {
}
@Override
public boolean acceptsDocsOutOfOrder() {
return true;
}
};
}
if( timeAllowed > 0 ) {
collector = new TimeLimitingCollector(collector, timeAllowed);
}
try {
super.search(query, luceneFilter, collector);
}
catch( TimeLimitingCollector.TimeExceededException x ) {
log.warn( "Query: " + query + "; " + x.getMessage() );
qr.setPartialResults(true);
}
nDocsReturned=0;
ids = new int[nDocsReturned];
scores = new float[nDocsReturned];
totalHits = numHits[0];
maxScore = totalHits>0 ? topscore[0] : 0.0f;
} else {
TopDocsCollector topCollector;
if (cmd.getSort() == null) {
topCollector = TopScoreDocCollector.create(len, true);
} else {
topCollector = TopFieldCollector.create(weightSort(cmd.getSort()), len, false, needScores, needScores, true);
}
Collector collector = topCollector;
if( timeAllowed > 0 ) {
collector = new TimeLimitingCollector(collector, timeAllowed);
}
try {
super.search(query, luceneFilter, collector);
}
catch( TimeLimitingCollector.TimeExceededException x ) {
log.warn( "Query: " + query + "; " + x.getMessage() );
qr.setPartialResults(true);
}
totalHits = topCollector.getTotalHits();
TopDocs topDocs = topCollector.topDocs(0, len);
maxScore = totalHits>0 ? topDocs.getMaxScore() : 0.0f;
nDocsReturned = topDocs.scoreDocs.length;
ids = new int[nDocsReturned];
scores = (cmd.getFlags()&GET_SCORES)!=0 ? new float[nDocsReturned] : null;
for (int i=0; i<nDocsReturned; i++) {
ScoreDoc scoreDoc = topDocs.scoreDocs[i];
ids[i] = scoreDoc.doc;
if (scores != null) scores[i] = scoreDoc.score;
}
}
int sliceLen = Math.min(lastDocRequested,nDocsReturned);
if (sliceLen < 0) sliceLen=0;
qr.setDocList(new DocSlice(0,sliceLen,ids,scores,totalHits,maxScore));
}
// any DocSet returned is for the query only, without any filtering... that way it may
// be cached if desired.
private DocSet getDocListAndSetNC(QueryResult qr,QueryCommand cmd) throws IOException {
int len = cmd.getSupersetMaxDoc();
DocSet filter = cmd.getFilter()!=null ? cmd.getFilter() : getDocSet(cmd.getFilterList());
int last = len;
if (last < 0 || last > maxDoc()) last=maxDoc();
final int lastDocRequested = last;
int nDocsReturned;
int totalHits;
float maxScore;
int[] ids;
float[] scores;
DocSet set;
boolean needScores = (cmd.getFlags() & GET_SCORES) != 0;
int maxDoc = maxDoc();
int smallSetSize = maxDoc>>6;
Query query = QueryUtils.makeQueryable(cmd.getQuery());
final long timeAllowed = cmd.getTimeAllowed();
final Filter luceneFilter = filter==null ? null : filter.getTopFilter();
// handle zero case...
if (lastDocRequested<=0) {
final float[] topscore = new float[] { Float.NEGATIVE_INFINITY };
Collector collector;
DocSetCollector setCollector;
if (!needScores) {
collector = setCollector = new DocSetCollector(smallSetSize, maxDoc);
} else {
collector = setCollector = new DocSetDelegateCollector(smallSetSize, maxDoc, new Collector() {
Scorer scorer;
@Override
public void setScorer(Scorer scorer) throws IOException {
this.scorer = scorer;
}
@Override
public void collect(int doc) throws IOException {
float score = scorer.score();
if (score > topscore[0]) topscore[0]=score;
}
@Override
public void setNextReader(IndexReader reader, int docBase) throws IOException {
}
@Override
public boolean acceptsDocsOutOfOrder() {
return false;
}
});
}
if( timeAllowed > 0 ) {
collector = new TimeLimitingCollector(collector, timeAllowed);
}
try {
super.search(query, luceneFilter, collector);
}
catch( TimeLimitingCollector.TimeExceededException x ) {
log.warn( "Query: " + query + "; " + x.getMessage() );
qr.setPartialResults(true);
}
set = setCollector.getDocSet();
nDocsReturned = 0;
ids = new int[nDocsReturned];
scores = new float[nDocsReturned];
totalHits = set.size();
maxScore = totalHits>0 ? topscore[0] : 0.0f;
} else {
TopDocsCollector topCollector;
if (cmd.getSort() == null) {
topCollector = TopScoreDocCollector.create(len, true);
} else {
topCollector = TopFieldCollector.create(weightSort(cmd.getSort()), len, false, needScores, needScores, true);
}
DocSetCollector setCollector = new DocSetDelegateCollector(maxDoc>>6, maxDoc, topCollector);
Collector collector = setCollector;
if( timeAllowed > 0 ) {
collector = new TimeLimitingCollector(collector, timeAllowed );
}
try {
super.search(query, luceneFilter, collector);
}
catch( TimeLimitingCollector.TimeExceededException x ) {
log.warn( "Query: " + query + "; " + x.getMessage() );
qr.setPartialResults(true);
}
set = setCollector.getDocSet();
totalHits = topCollector.getTotalHits();
assert(totalHits == set.size());
TopDocs topDocs = topCollector.topDocs(0, len);
maxScore = totalHits>0 ? topDocs.getMaxScore() : 0.0f;
nDocsReturned = topDocs.scoreDocs.length;
ids = new int[nDocsReturned];
scores = (cmd.getFlags()&GET_SCORES)!=0 ? new float[nDocsReturned] : null;
for (int i=0; i<nDocsReturned; i++) {
ScoreDoc scoreDoc = topDocs.scoreDocs[i];
ids[i] = scoreDoc.doc;
if (scores != null) scores[i] = scoreDoc.score;
}
}
int sliceLen = Math.min(lastDocRequested,nDocsReturned);
if (sliceLen < 0) sliceLen=0;
qr.setDocList(new DocSlice(0,sliceLen,ids,scores,totalHits,maxScore));
// TODO: if we collect results before the filter, we just need to intersect with
// that filter to generate the DocSet for qr.setDocSet()
qr.setDocSet(set);
// TODO: currently we don't generate the DocSet for the base query,
// but the QueryDocSet == CompleteDocSet if filter==null.
return filter==null ? qr.getDocSet() : null;
}
/**
* Returns documents matching both <code>query</code> and <code>filter</code>
* and sorted by <code>sort</code>.
* FUTURE: The returned DocList may be retrieved from a cache.
*
* @param query
* @param filter may be null
* @param lsort criteria by which to sort (if null, query relevance is used)
* @param offset offset into the list of documents to return
* @param len maximum number of documents to return
* @return DocList meeting the specified criteria, should <b>not</b> be modified by the caller.
* @throws IOException
*/
public DocList getDocList(Query query, DocSet filter, Sort lsort, int offset, int len) throws IOException {
QueryCommand qc = new QueryCommand();
qc.setQuery(query)
.setFilter(filter)
.setSort(lsort)
.setOffset(offset)
.setLen(len);
QueryResult qr = new QueryResult();
search(qr,qc);
return qr.getDocList();
}
/**
* Returns documents matching both <code>query</code> and <code>filter</code>
* and sorted by <code>sort</code>. Also returns the complete set of documents
* matching <code>query</code> and <code>filter</code> (regardless of <code>offset</code> and <code>len</code>).
* <p>
* This method is cache aware and may retrieve <code>filter</code> from
* the cache or make an insertion into the cache as a result of this call.
* <p>
* FUTURE: The returned DocList may be retrieved from a cache.
* <p>
* The DocList and DocSet returned should <b>not</b> be modified.
*
* @param query
* @param filter may be null
* @param lsort criteria by which to sort (if null, query relevance is used)
* @param offset offset into the list of documents to return
* @param len maximum number of documents to return
* @return DocListAndSet meeting the specified criteria, should <b>not</b> be modified by the caller.
* @throws IOException
*/
public DocListAndSet getDocListAndSet(Query query, Query filter, Sort lsort, int offset, int len) throws IOException {
QueryCommand qc = new QueryCommand();
qc.setQuery(query)
.setFilterList(filter)
.setSort(lsort)
.setOffset(offset)
.setLen(len)
.setNeedDocSet(true);
QueryResult qr = new QueryResult();
search(qr,qc);
return qr.getDocListAndSet();
}
/**
* Returns documents matching both <code>query</code> and <code>filter</code>
* and sorted by <code>sort</code>. Also returns the compete set of documents
* matching <code>query</code> and <code>filter</code> (regardless of <code>offset</code> and <code>len</code>).
* <p>
* This method is cache aware and may retrieve <code>filter</code> from
* the cache or make an insertion into the cache as a result of this call.
* <p>
* FUTURE: The returned DocList may be retrieved from a cache.
* <p>
* The DocList and DocSet returned should <b>not</b> be modified.
*
* @param query
* @param filter may be null
* @param lsort criteria by which to sort (if null, query relevance is used)
* @param offset offset into the list of documents to return
* @param len maximum number of documents to return
* @param flags user supplied flags for the result set
* @return DocListAndSet meeting the specified criteria, should <b>not</b> be modified by the caller.
* @throws IOException
*/
public DocListAndSet getDocListAndSet(Query query, Query filter, Sort lsort, int offset, int len, int flags) throws IOException {
QueryCommand qc = new QueryCommand();
qc.setQuery(query)
.setFilterList(filter)
.setSort(lsort)
.setOffset(offset)
.setLen(len)
.setFlags(flags)
.setNeedDocSet(true);
QueryResult qr = new QueryResult();
search(qr,qc);
return qr.getDocListAndSet();
}
/**
* Returns documents matching both <code>query</code> and the intersection
* of <code>filterList</code>, sorted by <code>sort</code>.
* Also returns the compete set of documents
* matching <code>query</code> and <code>filter</code>
* (regardless of <code>offset</code> and <code>len</code>).
* <p>
* This method is cache aware and may retrieve <code>filter</code> from
* the cache or make an insertion into the cache as a result of this call.
* <p>
* FUTURE: The returned DocList may be retrieved from a cache.
* <p>
* The DocList and DocSet returned should <b>not</b> be modified.
*
* @param query
* @param filterList may be null
* @param lsort criteria by which to sort (if null, query relevance is used)
* @param offset offset into the list of documents to return
* @param len maximum number of documents to return
* @return DocListAndSet meeting the specified criteria, should <b>not</b> be modified by the caller.
* @throws IOException
*/
public DocListAndSet getDocListAndSet(Query query, List<Query> filterList, Sort lsort, int offset, int len) throws IOException {
QueryCommand qc = new QueryCommand();
qc.setQuery(query)
.setFilterList(filterList)
.setSort(lsort)
.setOffset(offset)
.setLen(len)
.setNeedDocSet(true);
QueryResult qr = new QueryResult();
search(qr,qc);
return qr.getDocListAndSet();
}
/**
* Returns documents matching both <code>query</code> and the intersection
* of <code>filterList</code>, sorted by <code>sort</code>.
* Also returns the compete set of documents
* matching <code>query</code> and <code>filter</code>
* (regardless of <code>offset</code> and <code>len</code>).
* <p>
* This method is cache aware and may retrieve <code>filter</code> from
* the cache or make an insertion into the cache as a result of this call.
* <p>
* FUTURE: The returned DocList may be retrieved from a cache.
* <p>
* The DocList and DocSet returned should <b>not</b> be modified.
*
* @param query
* @param filterList may be null
* @param lsort criteria by which to sort (if null, query relevance is used)
* @param offset offset into the list of documents to return
* @param len maximum number of documents to return
* @param flags user supplied flags for the result set
* @return DocListAndSet meeting the specified criteria, should <b>not</b> be modified by the caller.
* @throws IOException
*/
public DocListAndSet getDocListAndSet(Query query, List<Query> filterList, Sort lsort, int offset, int len, int flags) throws IOException {
QueryCommand qc = new QueryCommand();
qc.setQuery(query)
.setFilterList(filterList)
.setSort(lsort)
.setOffset(offset)
.setLen(len)
.setFlags(flags)
.setNeedDocSet(true);
QueryResult qr = new QueryResult();
search(qr,qc);
return qr.getDocListAndSet();
}
/**
* Returns documents matching both <code>query</code> and <code>filter</code>
* and sorted by <code>sort</code>. Also returns the compete set of documents
* matching <code>query</code> and <code>filter</code> (regardless of <code>offset</code> and <code>len</code>).
* <p>
* FUTURE: The returned DocList may be retrieved from a cache.
*
* @param query
* @param filter may be null
* @param lsort criteria by which to sort (if null, query relevance is used)
* @param offset offset into the list of documents to return
* @param len maximum number of documents to return
* @return DocListAndSet meeting the specified criteria, should <b>not</b> be modified by the caller.
* @throws IOException
*/
public DocListAndSet getDocListAndSet(Query query, DocSet filter, Sort lsort, int offset, int len) throws IOException {
QueryCommand qc = new QueryCommand();
qc.setQuery(query)
.setFilter(filter)
.setSort(lsort)
.setOffset(offset)
.setLen(len)
.setNeedDocSet(true);
QueryResult qr = new QueryResult();
search(qr,qc);
return qr.getDocListAndSet();
}
/**
* Returns documents matching both <code>query</code> and <code>filter</code>
* and sorted by <code>sort</code>. Also returns the compete set of documents
* matching <code>query</code> and <code>filter</code> (regardless of <code>offset</code> and <code>len</code>).
* <p>
* This method is cache aware and may make an insertion into the cache
* as a result of this call.
* <p>
* FUTURE: The returned DocList may be retrieved from a cache.
* <p>
* The DocList and DocSet returned should <b>not</b> be modified.
*
* @param query
* @param filter may be null
* @param lsort criteria by which to sort (if null, query relevance is used)
* @param offset offset into the list of documents to return
* @param len maximum number of documents to return
* @param flags user supplied flags for the result set
* @return DocListAndSet meeting the specified criteria, should <b>not</b> be modified by the caller.
* @throws IOException
*/
public DocListAndSet getDocListAndSet(Query query, DocSet filter, Sort lsort, int offset, int len, int flags) throws IOException {
QueryCommand qc = new QueryCommand();
qc.setQuery(query)
.setFilter(filter)
.setSort(lsort)
.setOffset(offset)
.setLen(len)
.setFlags(flags)
.setNeedDocSet(true);
QueryResult qr = new QueryResult();
search(qr,qc);
return qr.getDocListAndSet();
}
protected DocList sortDocSet(DocSet set, Sort sort, int nDocs) throws IOException {
// bit of a hack to tell if a set is sorted - do it better in the futute.
boolean inOrder = set instanceof BitDocSet || set instanceof SortedIntDocSet;
TopDocsCollector topCollector = TopFieldCollector.create(weightSort(sort), nDocs, false, false, false, inOrder);
DocIterator iter = set.iterator();
int base=0;
int end=0;
int readerIndex = -1;
SolrIndexReader r=null;
while(iter.hasNext()) {
int doc = iter.nextDoc();
while (doc>=end) {
r = reader.getLeafReaders()[++readerIndex];
base = reader.getLeafOffsets()[readerIndex];
end = base + r.maxDoc();
topCollector.setNextReader(r, base);
// we should never need to set the scorer given the settings for the collector
}
topCollector.collect(doc-base);
}
TopDocs topDocs = topCollector.topDocs(0, nDocs);
int nDocsReturned = topDocs.scoreDocs.length;
int[] ids = new int[nDocsReturned];
for (int i=0; i<nDocsReturned; i++) {
ScoreDoc scoreDoc = topDocs.scoreDocs[i];
ids[i] = scoreDoc.doc;
}
return new DocSlice(0,nDocsReturned,ids,null,topDocs.totalHits,0.0f);
}
/**
* Returns the number of documents that match both <code>a</code> and <code>b</code>.
* <p>
* This method is cache-aware and may check as well as modify the cache.
*
* @param a
* @param b
* @return the numer of documents in the intersection between <code>a</code> and <code>b</code>.
* @throws IOException
*/
public int numDocs(Query a, DocSet b) throws IOException {
// Negative query if absolute value different from original
Query absQ = QueryUtils.getAbs(a);
DocSet positiveA = getPositiveDocSet(absQ);
return a==absQ ? b.intersectionSize(positiveA) : b.andNotSize(positiveA);
}
/**
* Returns the number of documents that match both <code>a</code> and <code>b</code>.
* <p>
* This method is cache-aware and may check as well as modify the cache.
*
* @param a
* @param b
* @return the numer of documents in the intersection between <code>a</code> and <code>b</code>.
* @throws IOException
*/
public int numDocs(Query a, Query b) throws IOException {
Query absA = QueryUtils.getAbs(a);
Query absB = QueryUtils.getAbs(b);
DocSet positiveA = getPositiveDocSet(absA);
DocSet positiveB = getPositiveDocSet(absB);
// Negative query if absolute value different from original
if (a==absA) {
if (b==absB) return positiveA.intersectionSize(positiveB);
return positiveA.andNotSize(positiveB);
}
if (b==absB) return positiveB.andNotSize(positiveA);
// if both negative, we need to create a temp DocSet since we
// don't have a counting method that takes three.
DocSet all = getPositiveDocSet(matchAllDocsQuery);
// -a -b == *:*.andNot(a).andNotSize(b) == *.*.andNotSize(a.union(b))
// we use the last form since the intermediate DocSet should normally be smaller.
return all.andNotSize(positiveA.union(positiveB));
}
/**
* Takes a list of docs (the doc ids actually), and returns an array
* of Documents containing all of the stored fields.
*/
public Document[] readDocs(DocList ids) throws IOException {
Document[] docs = new Document[ids.size()];
readDocs(docs,ids);
return docs;
}
/**
* Warm this searcher based on an old one (primarily for auto-cache warming).
*/
public void warm(SolrIndexSearcher old) throws IOException {
// Make sure this is first! filters can help queryResults execute!
boolean logme = log.isInfoEnabled();
long warmingStartTime = System.currentTimeMillis();
// warm the caches in order...
for (int i=0; i<cacheList.length; i++) {
if (logme) log.info("autowarming " + this + " from " + old + "\n\t" + old.cacheList[i]);
this.cacheList[i].warm(this, old.cacheList[i]);
if (logme) log.info("autowarming result for " + this + "\n\t" + this.cacheList[i]);
}
warmupTime = System.currentTimeMillis() - warmingStartTime;
}
/**
* return the named generic cache
*/
public SolrCache getCache(String cacheName) {
return cacheMap.get(cacheName);
}
/**
* lookup an entry in a generic cache
*/
public Object cacheLookup(String cacheName, Object key) {
SolrCache cache = cacheMap.get(cacheName);
return cache==null ? null : cache.get(key);
}
/**
* insert an entry in a generic cache
*/
public Object cacheInsert(String cacheName, Object key, Object val) {
SolrCache cache = cacheMap.get(cacheName);
return cache==null ? null : cache.put(key,val);
}
public long getOpenTime() {
return openTime;
}
/////////////////////////////////////////////////////////////////////
// SolrInfoMBean stuff: Statistics and Module Info
/////////////////////////////////////////////////////////////////////
public String getName() {
return SolrIndexSearcher.class.getName();
}
public String getVersion() {
return SolrCore.version;
}
public String getDescription() {
return "index searcher";
}
public Category getCategory() {
return Category.CORE;
}
public String getSourceId() {
return "$Id: SolrIndexSearcher.java 1137067 2011-06-17 22:59:36Z mvg $";
}
public String getSource() {
return "$URL: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_3_3/solr/src/java/org/apache/solr/search/SolrIndexSearcher.java $";
}
public URL[] getDocs() {
return null;
}
public NamedList getStatistics() {
NamedList lst = new SimpleOrderedMap();
lst.add("searcherName", name);
lst.add("caching", cachingEnabled);
lst.add("numDocs", reader.numDocs());
lst.add("maxDoc", reader.maxDoc());
lst.add("reader", reader.toString());
lst.add("readerDir", reader.directory());
lst.add("indexVersion", reader.getVersion());
lst.add("openedAt", new Date(openTime));
if (registerTime!=0) lst.add("registeredAt", new Date(registerTime));
lst.add("warmupTime", warmupTime);
return lst;
}
/**
* A query request command to avoid having to change the method signatures
* if we want to pass additional information to the searcher.
*/
public static class QueryCommand {
private Query query;
private List<Query> filterList;
private DocSet filter;
private Sort sort;
private int offset;
private int len;
private int supersetMaxDoc;
private int flags;
private long timeAllowed = -1;
public Query getQuery() { return query; }
public QueryCommand setQuery(Query query) {
this.query = query;
return this;
}
public List<Query> getFilterList() { return filterList; }
/**
* @throws IllegalArgumentException if filter is not null.
*/
public QueryCommand setFilterList(List<Query> filterList) {
if( filter != null ) {
throw new IllegalArgumentException( "Either filter or filterList may be set in the QueryCommand, but not both." );
}
this.filterList = filterList;
return this;
}
/**
* A simple setter to build a filterList from a query
* @throws IllegalArgumentException if filter is not null.
*/
public QueryCommand setFilterList(Query f) {
if( filter != null ) {
throw new IllegalArgumentException( "Either filter or filterList may be set in the QueryCommand, but not both." );
}
filterList = null;
if (f != null) {
filterList = new ArrayList<Query>(2);
filterList.add(f);
}
return this;
}
public DocSet getFilter() { return filter; }
/**
* @throws IllegalArgumentException if filterList is not null.
*/
public QueryCommand setFilter(DocSet filter) {
if( filterList != null ) {
throw new IllegalArgumentException( "Either filter or filterList may be set in the QueryCommand, but not both." );
}
this.filter = filter;
return this;
}
public Sort getSort() { return sort; }
public QueryCommand setSort(Sort sort) {
this.sort = sort;
return this;
}
public int getOffset() { return offset; }
public QueryCommand setOffset(int offset) {
this.offset = offset;
return this;
}
public int getLen() { return len; }
public QueryCommand setLen(int len) {
this.len = len;
return this;
}
public int getSupersetMaxDoc() { return supersetMaxDoc; }
public QueryCommand setSupersetMaxDoc(int supersetMaxDoc) {
this.supersetMaxDoc = supersetMaxDoc;
return this;
}
public int getFlags() {
return flags;
}
public QueryCommand replaceFlags(int flags) {
this.flags = flags;
return this;
}
public QueryCommand setFlags(int flags) {
this.flags |= flags;
return this;
}
public QueryCommand clearFlags(int flags) {
this.flags &= ~flags;
return this;
}
public long getTimeAllowed() { return timeAllowed; }
public QueryCommand setTimeAllowed(long timeAllowed) {
this.timeAllowed = timeAllowed;
return this;
}
public boolean isNeedDocSet() { return (flags & GET_DOCSET) != 0; }
public QueryCommand setNeedDocSet(boolean needDocSet) {
return needDocSet ? setFlags(GET_DOCSET) : clearFlags(GET_DOCSET);
}
}
/**
* The result of a search.
*/
public static class QueryResult {
private boolean partialResults;
private DocListAndSet docListAndSet;
public Object groupedResults; // Todo: Refactor. At least getter setter and different type.
public DocList getDocList() { return docListAndSet.docList; }
public void setDocList(DocList list) {
if( docListAndSet == null ) {
docListAndSet = new DocListAndSet();
}
docListAndSet.docList = list;
}
public DocSet getDocSet() { return docListAndSet.docSet; }
public void setDocSet(DocSet set) {
if( docListAndSet == null ) {
docListAndSet = new DocListAndSet();
}
docListAndSet.docSet = set;
}
public boolean isPartialResults() { return partialResults; }
public void setPartialResults(boolean partialResults) { this.partialResults = partialResults; }
public void setDocListAndSet( DocListAndSet listSet ) { docListAndSet = listSet; }
public DocListAndSet getDocListAndSet() { return docListAndSet; }
}
}