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/*------------------------------------------------------------------------------
* Copyright (C) 2003-2006 Ben van Klinken and the CLucene Team
*
* Distributable under the terms of either the Apache License (Version 2.0) or
* the GNU Lesser General Public License, as specified in the COPYING file.
------------------------------------------------------------------------------*/
#include "CLucene/StdHeader.h"
#include "FieldSortedHitQueue.h"
#include "FieldDocSortedHitQueue.h"
#include "Compare.h"
CL_NS_USE(util)
CL_NS_USE(index)
CL_NS_DEF(search)
FieldSortedHitQueue::hitqueueCacheType FieldSortedHitQueue::Comparators(false,true);
FieldSortedHitQueue::FieldSortedHitQueue (IndexReader* reader, SortField** _fields, int32_t size):
fieldsLen(0),
maxscore(1.0f)
{
while ( _fields[fieldsLen] != 0 )
fieldsLen++;
comparators = _CL_NEWARRAY(ScoreDocComparator*,fieldsLen+1);
SortField** tmp = _CL_NEWARRAY(SortField*,fieldsLen+1);
for (int32_t i=0; i<fieldsLen; ++i) {
const TCHAR* fieldname = _fields[i]->getField();
//todo: fields[i].getLocale(), not implemented
comparators[i] = getCachedComparator (reader, fieldname, _fields[i]->getType(), _fields[i]->getFactory());
tmp[i] = _CLNEW SortField (fieldname, comparators[i]->sortType(), _fields[i]->getReverse());
}
comparatorsLen = fieldsLen;
comparators[fieldsLen]=NULL;
tmp[fieldsLen] = NULL;
this->fields = tmp;
initialize(size,true);
}
bool FieldSortedHitQueue::lessThan (FieldDoc* docA, FieldDoc* docB) {
// keep track of maximum score
if (docA->scoreDoc.score > maxscore) maxscore = docA->scoreDoc.score;
if (docB->scoreDoc.score > maxscore) maxscore = docB->scoreDoc.score;
// run comparators
int32_t c = 0;
for ( int32_t i=0; c==0 && i<comparatorsLen; ++i ) {
c = (fields[i]->getReverse()) ? comparators[i]->compare (&docB->scoreDoc, &docA->scoreDoc) :
comparators[i]->compare (&docA->scoreDoc, &docB->scoreDoc);
}
// avoid random sort order that could lead to duplicates (bug #31241):
if (c == 0)
return docA->scoreDoc.doc > docB->scoreDoc.doc;
return c > 0;
}
//static
ScoreDocComparator* FieldSortedHitQueue::comparatorString (IndexReader* reader, const TCHAR* field) {
//const TCHAR* field = CLStringIntern::intern(fieldname CL_FILELINE);
FieldCacheAuto* fa = FieldCache::DEFAULT->getStringIndex (reader, field);
//CLStringIntern::unintern(field);
CND_PRECONDITION(fa->contentType==FieldCacheAuto::STRING_INDEX,"Content type is incorrect");
fa->ownContents = false;
return _CLNEW ScoreDocComparators::String(fa->stringIndex, fa->contentLen);
}
//static
ScoreDocComparator* FieldSortedHitQueue::comparatorInt (IndexReader* reader, const TCHAR* field){
//const TCHAR* field = CLStringIntern::intern(fieldname CL_FILELINE);
FieldCacheAuto* fa = FieldCache::DEFAULT->getInts (reader, field);
//CLStringIntern::unintern(field);
CND_PRECONDITION(fa->contentType==FieldCacheAuto::INT_ARRAY,"Content type is incorrect");
return _CLNEW ScoreDocComparators::Int32(fa->intArray, fa->contentLen);
}
//static
ScoreDocComparator* FieldSortedHitQueue::comparatorFloat (IndexReader* reader, const TCHAR* field) {
//const TCHAR* field = CLStringIntern::intern(fieldname CL_FILELINE);
FieldCacheAuto* fa = FieldCache::DEFAULT->getFloats (reader, field);
//CLStringIntern::unintern(field);
CND_PRECONDITION(fa->contentType==FieldCacheAuto::FLOAT_ARRAY,"Content type is incorrect");
return _CLNEW ScoreDocComparators::Float (fa->floatArray, fa->contentLen);
}
//static
ScoreDocComparator* FieldSortedHitQueue::comparatorAuto (IndexReader* reader, const TCHAR* field){
//const TCHAR* field = CLStringIntern::intern(fieldname CL_FILELINE);
FieldCacheAuto* fa = FieldCache::DEFAULT->getAuto (reader, field);
//CLStringIntern::unintern(field);
if (fa->contentType == FieldCacheAuto::STRING_INDEX ) {
return comparatorString (reader, field);
} else if (fa->contentType == FieldCacheAuto::INT_ARRAY) {
return comparatorInt (reader, field);
} else if (fa->contentType == FieldCacheAuto::FLOAT_ARRAY) {
return comparatorFloat (reader, field);
} else if (fa->contentType == FieldCacheAuto::STRING_ARRAY) {
return comparatorString (reader, field);
} else {
_CLTHROWA(CL_ERR_Runtime, "unknown data type in field"); //todo: rich error information: '"+field+"'");
}
}
//todo: Locale locale, not implemented yet
ScoreDocComparator* FieldSortedHitQueue::getCachedComparator (IndexReader* reader, const TCHAR* fieldname, int32_t type, SortComparatorSource* factory){
if (type == SortField::DOC)
return ScoreDocComparator::INDEXORDER;
if (type == SortField::DOCSCORE)
return ScoreDocComparator::RELEVANCE;
ScoreDocComparator* comparator = lookup (reader, fieldname, type, factory);
if (comparator == NULL) {
switch (type) {
case SortField::AUTO:
comparator = comparatorAuto (reader, fieldname);
break;
case SortField::INT:
comparator = comparatorInt (reader, fieldname);
break;
case SortField::FLOAT:
comparator = comparatorFloat (reader, fieldname);
break;
case SortField::STRING:
//if (locale != NULL)
// comparator = comparatorStringLocale (reader, fieldname, locale);
//else
comparator = comparatorString (reader, fieldname);
break;
case SortField::CUSTOM:
comparator = factory->newComparator (reader, fieldname);
break;
default:
_CLTHROWA(CL_ERR_Runtime,"unknown field type");
//todo: extend error
//throw _CLNEW RuntimeException ("unknown field type: "+type);
}
store (reader, fieldname, type, factory, comparator);
}
return comparator;
}
FieldDoc* FieldSortedHitQueue::fillFields (FieldDoc* doc) const{
int32_t n = comparatorsLen;
Comparable** fields = _CL_NEWARRAY(Comparable*,n+1);
for (int32_t i=0; i<n; ++i)
fields[i] = comparators[i]->sortValue(&doc->scoreDoc);
fields[n]=NULL;
doc->fields = fields;
if (maxscore > 1.0f)
doc->scoreDoc.score /= maxscore; // normalize scores
return doc;
}
ScoreDocComparator* FieldSortedHitQueue::lookup (IndexReader* reader, const TCHAR* field, int32_t type, SortComparatorSource* factory) {
ScoreDocComparator* sdc = NULL;
FieldCacheImpl::FileEntry* entry = (factory != NULL)
? _CLNEW FieldCacheImpl::FileEntry (field, factory)
: _CLNEW FieldCacheImpl::FileEntry (field, type);
{
SCOPED_LOCK_MUTEX(Comparators.THIS_LOCK)
hitqueueCacheReaderType* readerCache = Comparators.get(reader);
if (readerCache == NULL){
_CLDELETE(entry);
return NULL;
}
sdc = readerCache->get (entry);
_CLDELETE(entry);
}
return sdc;
}
void FieldSortedHitQueue::closeCallback(CL_NS(index)::IndexReader* reader, void*){
SCOPED_LOCK_MUTEX(Comparators.THIS_LOCK)
Comparators.remove(reader);
}
//static
void FieldSortedHitQueue::store (IndexReader* reader, const TCHAR* field, int32_t type, SortComparatorSource* factory, ScoreDocComparator* value) {
FieldCacheImpl::FileEntry* entry = (factory != NULL)
? _CLNEW FieldCacheImpl::FileEntry (field, factory)
: _CLNEW FieldCacheImpl::FileEntry (field, type);
{
SCOPED_LOCK_MUTEX(Comparators.THIS_LOCK)
hitqueueCacheReaderType* readerCache = Comparators.get(reader);
if (readerCache == NULL) {
readerCache = _CLNEW hitqueueCacheReaderType(true);
Comparators.put(reader,readerCache);
reader->addCloseCallback(FieldSortedHitQueue::closeCallback,NULL);
}
readerCache->put (entry, value);
//return NULL; //supposed to return previous value...
}
}
FieldSortedHitQueue::~FieldSortedHitQueue(){
_CLDELETE_ARRAY(comparators);
if ( fields != NULL ){
for ( int i=0;fields[i]!=NULL;i++ )
_CLDELETE(fields[i]);
_CLDELETE_ARRAY(fields);
}
}
CL_NS_END
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