1 files changed, 80 insertions, 0 deletions
diff --git a/db/matcher_covered.cpp b/db/matcher_covered.cpp
new file mode 100644
index 0000000..5866505
--- /dev/null
+++ b/db/matcher_covered.cpp
@@ -0,0 +1,80 @@
+// matcher_covered.cpp
+
+/* Matcher is our boolean expression evaluator for "where" clauses */
+
+/**
+*    Copyright (C) 2008 10gen Inc.
+*
+*    This program is free software: you can redistribute it and/or  modify
+*    it under the terms of the GNU Affero General Public License, version 3,
+*    as published by the Free Software Foundation.
+*
+*    This program is distributed in the hope that it will be useful,
+*    but WITHOUT ANY WARRANTY; without even the implied warranty of
+*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*    GNU Affero General Public License for more details.
+*
+*    You should have received a copy of the GNU Affero General Public License
+*    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "pch.h"
+#include "matcher.h"
+#include "../util/goodies.h"
+#include "../util/unittest.h"
+#include "diskloc.h"
+#include "../scripting/engine.h"
+#include "db.h"
+#include "client.h"
+
+#include "pdfile.h"
+
+namespace mongo {
+
+    CoveredIndexMatcher::CoveredIndexMatcher( const BSONObj &jsobj, const BSONObj &indexKeyPattern, bool alwaysUseRecord) :
+        _docMatcher( new Matcher( jsobj ) ),
+        _keyMatcher( *_docMatcher, indexKeyPattern )
+    {
+        init( alwaysUseRecord );
+    }
+ 
+    CoveredIndexMatcher::CoveredIndexMatcher( const shared_ptr< Matcher > &docMatcher, const BSONObj &indexKeyPattern , bool alwaysUseRecord ) :
+        _docMatcher( docMatcher ),
+        _keyMatcher( *_docMatcher, indexKeyPattern )
+    {
+        init( alwaysUseRecord );
+    }
+
+    void CoveredIndexMatcher::init( bool alwaysUseRecord ) {
+        _needRecord = 
+        alwaysUseRecord || 
+        ! ( _docMatcher->keyMatch() && 
+           _keyMatcher.sameCriteriaCount( *_docMatcher ) &&
+           ! _keyMatcher.hasType( BSONObj::opEXISTS ) );
+        ;        
+    }
+    
+    bool CoveredIndexMatcher::matchesCurrent( Cursor * cursor , MatchDetails * details ){
+        return matches( cursor->currKey() , cursor->currLoc() , details );
+    }
+    
+    bool CoveredIndexMatcher::matches(const BSONObj &key, const DiskLoc &recLoc , MatchDetails * details ) {
+        if ( details )
+            details->reset();
+        
+        if ( !_keyMatcher.matches(key, details ) ){
+            return false;
+        }
+        
+        if ( ! _needRecord ){
+            return true;
+        }
+
+        if ( details )
+            details->loadedObject = true;
+
+        return _docMatcher->matches(recLoc.rec() , details );
+    }
+    
+
+}