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74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
// matcher_covered.cpp
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/* Matcher is our boolean expression evaluator for "where" clauses */
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/**
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* Copyright (C) 2008 10gen Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "pch.h"
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#include "matcher.h"
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#include "../util/goodies.h"
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#include "../util/unittest.h"
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#include "diskloc.h"
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#include "../scripting/engine.h"
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#include "db.h"
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#include "client.h"
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#include "pdfile.h"
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namespace mongo {
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CoveredIndexMatcher::CoveredIndexMatcher(const BSONObj &jsobj, const BSONObj &indexKeyPattern, bool alwaysUseRecord) :
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_keyMatcher(jsobj.filterFieldsUndotted(indexKeyPattern, true),
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indexKeyPattern),
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_docMatcher(jsobj)
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{
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_needRecord =
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alwaysUseRecord ||
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! ( _docMatcher.keyMatch() &&
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_keyMatcher.jsobj.nFields() == _docMatcher.jsobj.nFields() &&
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! _keyMatcher.hasType( BSONObj::opEXISTS ) );
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;
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}
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bool CoveredIndexMatcher::matchesCurrent( Cursor * cursor , MatchDetails * details ){
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return matches( cursor->currKey() , cursor->currLoc() , details );
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}
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bool CoveredIndexMatcher::matches(const BSONObj &key, const DiskLoc &recLoc , MatchDetails * details ) {
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if ( details )
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details->reset();
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if ( _keyMatcher.keyMatch() ) {
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if ( !_keyMatcher.matches(key, details ) ){
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return false;
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}
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}
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if ( ! _needRecord ){
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return true;
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}
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if ( details )
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details->loadedObject = true;
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return _docMatcher.matches(recLoc.rec() , details );
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}
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}
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