diff options
Diffstat (limited to 'src/mongo/db/ops/modifier_unset.h')
-rw-r--r-- | src/mongo/db/ops/modifier_unset.h | 120 |
1 files changed, 57 insertions, 63 deletions
diff --git a/src/mongo/db/ops/modifier_unset.h b/src/mongo/db/ops/modifier_unset.h index 53417a3c37e..a36b16ac19c 100644 --- a/src/mongo/db/ops/modifier_unset.h +++ b/src/mongo/db/ops/modifier_unset.h @@ -38,66 +38,60 @@ namespace mongo { - class LogBuilder; - - class ModifierUnset : public ModifierInterface { - MONGO_DISALLOW_COPYING(ModifierUnset); - - public: - - ModifierUnset(); - - // - // Modifier interface implementation - // - - virtual ~ModifierUnset(); - - /** - * A 'modExpr' is a BSONElement {<fieldname>: <value>} coming from a $set mod such as - * {$unset: {<fieldname: <value>}}. init() extracts the field name and the value to be - * assigned to it from 'modExpr'. It returns OK if successful or a status describing - * the error. - */ - virtual Status init(const BSONElement& modExpr, const Options& opts, - bool* positional = NULL); - - /** - * Locates the field to be removed under the 'root' element, if it exist, and fills in - * 'execInfo' accordingly. Return OK if successful or a status describing the error. - */ - virtual Status prepare(mutablebson::Element root, - StringData matchedField, - ExecInfo* execInfo); - - /** - * Removes the found element from the document. If such element was inside an array, - * removal means setting that array position to 'null'. - */ - virtual Status apply() const; - - /** - * Adds the exact $unset mod to the log. - */ - virtual Status log(LogBuilder* logBuilder) const; - - private: - - // Access to each component of fieldName that's the target of this mod. - FieldRef _fieldRef; - - // 0 or index for $-positional in _fieldRef. - size_t _posDollar; - - // Element of the $set expression. - BSONElement _val; - - // The instance of the field in the provided doc. This state is valid after a - // prepare() was issued and until a log() is issued. The document this mod is - // being prepared against must be live throughout all the calls. - struct PreparedState; - std::unique_ptr<PreparedState> _preparedState; - - }; - -} // namespace mongo +class LogBuilder; + +class ModifierUnset : public ModifierInterface { + MONGO_DISALLOW_COPYING(ModifierUnset); + +public: + ModifierUnset(); + + // + // Modifier interface implementation + // + + virtual ~ModifierUnset(); + + /** + * A 'modExpr' is a BSONElement {<fieldname>: <value>} coming from a $set mod such as + * {$unset: {<fieldname: <value>}}. init() extracts the field name and the value to be + * assigned to it from 'modExpr'. It returns OK if successful or a status describing + * the error. + */ + virtual Status init(const BSONElement& modExpr, const Options& opts, bool* positional = NULL); + + /** + * Locates the field to be removed under the 'root' element, if it exist, and fills in + * 'execInfo' accordingly. Return OK if successful or a status describing the error. + */ + virtual Status prepare(mutablebson::Element root, StringData matchedField, ExecInfo* execInfo); + + /** + * Removes the found element from the document. If such element was inside an array, + * removal means setting that array position to 'null'. + */ + virtual Status apply() const; + + /** + * Adds the exact $unset mod to the log. + */ + virtual Status log(LogBuilder* logBuilder) const; + +private: + // Access to each component of fieldName that's the target of this mod. + FieldRef _fieldRef; + + // 0 or index for $-positional in _fieldRef. + size_t _posDollar; + + // Element of the $set expression. + BSONElement _val; + + // The instance of the field in the provided doc. This state is valid after a + // prepare() was issued and until a log() is issued. The document this mod is + // being prepared against must be live throughout all the calls. + struct PreparedState; + std::unique_ptr<PreparedState> _preparedState; +}; + +} // namespace mongo |