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-#ifndef NET_PROTO2_UTIL_CONVERTER_INTERNAL_DEFAULT_VALUE_OBJECTWRITER_H_
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-#define NET_PROTO2_UTIL_CONVERTER_INTERNAL_DEFAULT_VALUE_OBJECTWRITER_H_
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-
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-#include <memory>
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-#include <stack>
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-#include <vector>
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-
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-#include "base/macros.h"
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-#include "net/proto2/util/converter/internal/type_info.h"
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-#include "net/proto2/util/converter/public/datapiece.h"
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-#include "net/proto2/util/converter/public/object_writer.h"
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-#include "net/proto2/util/converter/public/utility.h"
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-#include "net/proto2/util/public/type_resolver.h"
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-#include "strings/stringpiece.h"
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-
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-namespace proto2 {
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-namespace util {
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-namespace converter {
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-
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-// An ObjectWriter that renders non-repeated primitive fields of proto messages
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-// with their default values. DefaultValueObjectWriter holds objects, lists and
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-// fields it receives in a tree structure and writes them out to another
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-// ObjectWriter when EndObject() is called on the root object. It also writes
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-// out all non-repeated primitive fields that haven't been explicitly rendered
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-// with their default values (0 for numbers, "" for strings, etc).
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-class DefaultValueObjectWriter : public ObjectWriter {
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- public:
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-#ifndef PROTO2_OPENSOURCE
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- DefaultValueObjectWriter(const TypeInfo& typeinfo,
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- const google::protobuf::Type& type,
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- ObjectWriter* ow);
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-#endif // !PROTO2_OPENSOURCE
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- DefaultValueObjectWriter(TypeResolver* type_resolver,
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- const google::protobuf::Type& type,
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- ObjectWriter* ow);
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-
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- virtual ~DefaultValueObjectWriter();
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-
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- // ObjectWriter methods.
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- virtual DefaultValueObjectWriter* StartObject(StringPiece name);
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-
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- virtual DefaultValueObjectWriter* EndObject();
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-
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- virtual DefaultValueObjectWriter* StartList(StringPiece name);
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-
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- virtual DefaultValueObjectWriter* EndList();
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-
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- virtual DefaultValueObjectWriter* RenderBool(StringPiece name, bool value);
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-
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- virtual DefaultValueObjectWriter* RenderInt32(StringPiece name, int32 value);
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-
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- virtual DefaultValueObjectWriter* RenderUint32(StringPiece name,
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- uint32 value);
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-
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- virtual DefaultValueObjectWriter* RenderInt64(StringPiece name, int64 value);
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-
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- virtual DefaultValueObjectWriter* RenderUint64(StringPiece name,
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- uint64 value);
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-
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- virtual DefaultValueObjectWriter* RenderDouble(StringPiece name,
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- double value);
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-
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- virtual DefaultValueObjectWriter* RenderFloat(StringPiece name, float value);
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-
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- virtual DefaultValueObjectWriter* RenderString(StringPiece name,
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- StringPiece value);
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-#ifdef PROTO2_OPENSOURCE
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- virtual DefaultValueObjectWriter* RenderBytes(StringPiece name,
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- StringPiece value);
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-#else // PROTO2_OPENSOURCE
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- virtual DefaultValueObjectWriter* RenderCord(StringPiece name,
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- const Cord& value);
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-#endif // !PROTO2_OPENSOURCE
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-
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- virtual DefaultValueObjectWriter* RenderNull(StringPiece name);
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-
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- virtual DefaultValueObjectWriter* DisableCaseNormalizationForNextKey();
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-
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- private:
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- enum NodeKind {
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- PRIMITIVE = 0,
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- OBJECT = 1,
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- LIST = 2,
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- MAP = 3,
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- };
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-
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- // "Node" represents a node in the tree that holds the input of
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- // DefaultValueObjectWriter.
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- class Node {
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- public:
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- Node(const string& name, const google::protobuf::Type* type, NodeKind kind,
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- const DataPiece& data, bool is_placeholder);
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- virtual ~Node() {
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- for (int i = 0; i < children_.size(); ++i) {
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- delete children_[i];
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- }
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- }
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-
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- // Adds a child to this node. Takes ownership of this child.
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- void AddChild(Node* child) { children_.push_back(child); }
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-
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- // Finds the child given its name.
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- Node* FindChild(StringPiece name);
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-
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- // Populates children of this Node based on its type. If there are already
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- // children created, they will be merged to the result. Caller should pass
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- // in TypeInfo for looking up types of the children.
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- void PopulateChildren(const TypeInfo* typeinfo);
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-
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- // If this node is a leaf (has data), writes the current node to the
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- // ObjectWriter; if not, then recursively writes the children to the
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- // ObjectWriter.
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- void WriteTo(ObjectWriter* ow);
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-
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- // Accessors
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- const string& name() const { return name_; }
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-
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- const google::protobuf::Type* type() { return type_; }
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-
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- void set_type(const google::protobuf::Type* type) { type_ = type; }
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-
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- NodeKind kind() { return kind_; }
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-
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- int number_of_children() { return children_.size(); }
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-
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- void set_data(const DataPiece& data) { data_ = data; }
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-
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- void set_disable_normalize(bool disable_normalize) {
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- disable_normalize_ = disable_normalize;
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- }
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-
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- bool is_any() { return is_any_; }
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-
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- void set_is_any(bool is_any) { is_any_ = is_any; }
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-
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- void set_is_placeholder(bool is_placeholder) {
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- is_placeholder_ = is_placeholder;
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- }
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-
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- private:
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- // Returns the Value Type of a map given the Type of the map entry and a
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- // TypeInfo instance.
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- const google::protobuf::Type* GetMapValueType(
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- const google::protobuf::Type& entry_type, const TypeInfo* typeinfo);
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-
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- // Calls WriteTo() on every child in children_.
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- void WriteChildren(ObjectWriter* ow);
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-
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- // The name of this node.
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- string name_;
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- // google::protobuf::Type of this node. Owned by TypeInfo.
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- const google::protobuf::Type* type_;
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- // The kind of this node.
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- NodeKind kind_;
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- // Whether to disable case normalization of the name.
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- bool disable_normalize_;
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- // Whether this is a node for "Any".
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- bool is_any_;
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- // The data of this node when it is a leaf node.
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- DataPiece data_;
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- // Children of this node.
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- std::vector<Node*> children_;
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- // Whether this node is a placeholder for an object or list automatically
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- // generated when creating the parent node. Should be set to false after
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- // the parent node's StartObject()/StartList() method is called with this
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- // node's name.
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- bool is_placeholder_;
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- };
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-
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- // Populates children of "node" if it is an "any" Node and its real type has
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- // been given.
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- void MaybePopulateChildrenOfAny(Node* node);
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-
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- // Writes the root_ node to ow_ and resets the root_ and current_ pointer to
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- // nullptr.
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- void WriteRoot();
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-
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- // Creates a DataPiece containing the default value of the type of the field.
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- static DataPiece CreateDefaultDataPieceForField(
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- const google::protobuf::Field& field);
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-
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- // Returns disable_normalize_ and reset it to false.
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- bool GetAndResetDisableNormalize() {
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- return disable_normalize_ ? (disable_normalize_ = false, true) : false;
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- }
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-
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- // Adds or replaces the data_ of a primitive child node.
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- void RenderDataPiece(StringPiece name, const DataPiece& data);
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-
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- // Type information for all the types used in the descriptor. Used to find
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- // google::protobuf::Type of nested messages/enums.
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- const TypeInfo* typeinfo_;
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- // Whether the TypeInfo object is owned by this class.
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- bool own_typeinfo_;
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- // google::protobuf::Type of the root message type.
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- const google::protobuf::Type& type_;
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- // Holds copies of strings passed to RenderString.
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- vector<string*> string_values_;
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-
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- // Whether to disable case normalization of the next node.
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- bool disable_normalize_;
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- // The current Node. Owned by its parents.
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- Node* current_;
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- // The root Node.
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- std::unique_ptr<Node> root_;
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- // The stack to hold the path of Nodes from current_ to root_;
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- std::stack<Node*> stack_;
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-
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- ObjectWriter* ow_;
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-
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- DISALLOW_COPY_AND_ASSIGN(DefaultValueObjectWriter);
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-};
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-
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-} // namespace converter
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-} // namespace util
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-} // namespace proto2
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-
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-#endif // NET_PROTO2_UTIL_CONVERTER_INTERNAL_DEFAULT_VALUE_OBJECTWRITER_H_
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