1 files changed, 67 insertions, 0 deletions
diff --git a/src/mongo/db/pipeline/expression_context.h b/src/mongo/db/pipeline/expression_context.h
new file mode 100755
index 00000000000..0277039c80b
--- /dev/null
+++ b/src/mongo/db/pipeline/expression_context.h
@@ -0,0 +1,67 @@
+/**
+ * Copyright (c) 2011 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/>.
+ */
+
+#pragma once
+
+#include "pch.h"
+
+#include "util/intrusive_counter.h"
+
+namespace mongo {
+
+    class ExpressionContext :
+        public IntrusiveCounterUnsigned {
+    public:
+	virtual ~ExpressionContext();
+
+	void setInShard(bool b);
+	void setInRouter(bool b);
+
+	bool getInShard() const;
+	bool getInRouter() const;
+
+	static ExpressionContext *create();
+
+    private:
+	ExpressionContext();
+	
+	bool inShard;
+	bool inRouter;
+    };
+}
+
+
+/* ======================= INLINED IMPLEMENTATIONS ========================== */
+
+namespace mongo {
+
+    inline void ExpressionContext::setInShard(bool b) {
+	inShard = b;
+    }
+    
+    inline void ExpressionContext::setInRouter(bool b) {
+	inRouter = b;
+    }
+
+    inline bool ExpressionContext::getInShard() const {
+	return inShard;
+    }
+
+    inline bool ExpressionContext::getInRouter() const {
+	return inRouter;
+    }
+
+};