Function Accept
Synopsis
#include <include/rapidjson/document.h>
template <typename Handler>
bool Accept(Handler &handler) const
Description
Generate events of this value to a Handler.
This function adopts the GoF visitor pattern. Typical usage is to output this JSON value as JSON text via Writer, which is a Handler. It can also be used to deep clone this value via GenericDocument, which is also a Handler.
- Template Parameters
Handler- type of handler.- Parameters
handler- An object implementing concept Handler.
Mentioned in
- Getting Started / Usage at a glance
- Stream / StringBuffer (Output) {#StringBuffer}
- Stream / FileWriteStream (Output) {#FileWriteStream}
- Stream / OStreamWrapper {#OStreamWrapper}
- Stream / EncodedOutputStream {#EncodedOutputStream}
- Stream / AutoUTFOutputStream {#AutoUTFOutputStream}
- Stream / Example: ostream wrapper {#ExampleOStreamWrapper}
- Encoding / ASCII {#ASCII}
- Dom / DOM as SAX Event Publisher
- Schema / Basic Usage {#Basic}
- Schema / Serialization {#Serialization}
- Internals / SAX and DOM
- Examples / tutorial.cpp
- Examples / schemavalidator.cpp
- Examples / parsebyparts.cpp
- Examples / filterkeydom.cpp
- Examples / sortkeys.cpp
- Examples / simpledom.cpp
Source
Lines 1932-1970 in include/rapidjson/document.h.
template <typename Handler>
bool Accept(Handler& handler) const {
switch(GetType()) {
case kNullType: return handler.Null();
case kFalseType: return handler.Bool(false);
case kTrueType: return handler.Bool(true);
case kObjectType:
if (RAPIDJSON_UNLIKELY(!handler.StartObject()))
return false;
for (ConstMemberIterator m = MemberBegin(); m != MemberEnd(); ++m) {
RAPIDJSON_ASSERT(m->name.IsString()); // User may change the type of name by MemberIterator.
if (RAPIDJSON_UNLIKELY(!handler.Key(m->name.GetString(), m->name.GetStringLength(), (m->name.data_.f.flags & kCopyFlag) != 0)))
return false;
if (RAPIDJSON_UNLIKELY(!m->value.Accept(handler)))
return false;
}
return handler.EndObject(data_.o.size);
case kArrayType:
if (RAPIDJSON_UNLIKELY(!handler.StartArray()))
return false;
for (const GenericValue* v = Begin(); v != End(); ++v)
if (RAPIDJSON_UNLIKELY(!v->Accept(handler)))
return false;
return handler.EndArray(data_.a.size);
case kStringType:
return handler.String(GetString(), GetStringLength(), (data_.f.flags & kCopyFlag) != 0);
default:
RAPIDJSON_ASSERT(GetType() == kNumberType);
if (IsDouble()) return handler.Double(data_.n.d);
else if (IsInt()) return handler.Int(data_.n.i.i);
else if (IsUint()) return handler.Uint(data_.n.u.u);
else if (IsInt64()) return handler.Int64(data_.n.i64);
else return handler.Uint64(data_.n.u64);
}
}