diff options
Diffstat (limited to 'src/google/protobuf/util/internal/default_value_objectwriter.h')
-rw-r--r-- | src/google/protobuf/util/internal/default_value_objectwriter.h | 50 |
1 files changed, 45 insertions, 5 deletions
diff --git a/src/google/protobuf/util/internal/default_value_objectwriter.h b/src/google/protobuf/util/internal/default_value_objectwriter.h index 695b9dd8..1d85bed8 100644 --- a/src/google/protobuf/util/internal/default_value_objectwriter.h +++ b/src/google/protobuf/util/internal/default_value_objectwriter.h @@ -38,6 +38,7 @@ #include <stack> #include <vector> +#include <google/protobuf/stubs/callback.h> #include <google/protobuf/stubs/common.h> #include <google/protobuf/util/internal/type_info.h> #include <google/protobuf/util/internal/datapiece.h> @@ -59,6 +60,25 @@ namespace converter { // with their default values (0 for numbers, "" for strings, etc). class LIBPROTOBUF_EXPORT DefaultValueObjectWriter : public ObjectWriter { public: + // A Callback function to check whether a field needs to be scrubbed. + // + // Returns true if the field should not be present in the output. Returns + // false otherwise. + // + // The 'path' parameter is a vector of path to the field from root. For + // example: if a nested field "a.b.c" (b is the parent message field of c and + // a is the parent message field of b), then the vector should contain { "a", + // "b", "c" }. + // + // The Field* should point to the google::protobuf::Field of "c". + typedef ResultCallback2<bool /*return*/, + const std::vector<string>& /*path of the field*/, + const google::protobuf::Field* /*field*/> + FieldScrubCallBack; + + // A unique pointer to a DefaultValueObjectWriter::FieldScrubCallBack. + typedef google::protobuf::scoped_ptr<FieldScrubCallBack> FieldScrubCallBackPtr; + DefaultValueObjectWriter(TypeResolver* type_resolver, const google::protobuf::Type& type, ObjectWriter* ow); @@ -98,6 +118,10 @@ class LIBPROTOBUF_EXPORT DefaultValueObjectWriter : public ObjectWriter { virtual DefaultValueObjectWriter* RenderNull(StringPiece name); + // Register the callback for scrubbing of fields. Owership of + // field_scrub_callback pointer is also transferred to this class + void RegisterFieldScrubCallBack(FieldScrubCallBackPtr field_scrub_callback); + private: enum NodeKind { PRIMITIVE = 0, @@ -111,7 +135,8 @@ class LIBPROTOBUF_EXPORT DefaultValueObjectWriter : public ObjectWriter { class LIBPROTOBUF_EXPORT Node { public: Node(const string& name, const google::protobuf::Type* type, NodeKind kind, - const DataPiece& data, bool is_placeholder); + const DataPiece& data, bool is_placeholder, const vector<string>& path, + FieldScrubCallBack* field_scrub_callback); virtual ~Node() { for (int i = 0; i < children_.size(); ++i) { delete children_[i]; @@ -137,17 +162,19 @@ class LIBPROTOBUF_EXPORT DefaultValueObjectWriter : public ObjectWriter { // Accessors const string& name() const { return name_; } - const google::protobuf::Type* type() { return type_; } + const vector<string>& path() const { return path_; } + + const google::protobuf::Type* type() const { return type_; } void set_type(const google::protobuf::Type* type) { type_ = type; } - NodeKind kind() { return kind_; } + NodeKind kind() const { return kind_; } - int number_of_children() { return children_.size(); } + int number_of_children() const { return children_.size(); } void set_data(const DataPiece& data) { data_ = data; } - bool is_any() { return is_any_; } + bool is_any() const { return is_any_; } void set_is_any(bool is_any) { is_any_ = is_any; } @@ -181,6 +208,15 @@ class LIBPROTOBUF_EXPORT DefaultValueObjectWriter : public ObjectWriter { // the parent node's StartObject()/StartList() method is called with this // node's name. bool is_placeholder_; + + // Path of the field of this node + std::vector<string> path_; + + // Pointer to function for determining whether a field needs to be scrubbed + // or not. This callback is owned by the creator of this node. + FieldScrubCallBack* field_scrub_callback_; + + GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(Node); }; // Populates children of "node" if it is an "any" Node and its real type has @@ -221,6 +257,10 @@ class LIBPROTOBUF_EXPORT DefaultValueObjectWriter : public ObjectWriter { // The stack to hold the path of Nodes from current_ to root_; std::stack<Node*> stack_; + // Unique Pointer to function for determining whether a field needs to be + // scrubbed or not. + FieldScrubCallBackPtr field_scrub_callback_; + ObjectWriter* ow_; GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(DefaultValueObjectWriter); |