Document<Formatter>::Document(Formatter& formatter)
{
_elements.reserve(32);
_attributes.reserve(64);
_firstRootAttribute = ~0u;
// Parse the input formatter, building a tree
// of elements and a list of attributes.
// We can start with several top-level elements
unsigned lastEle = ~0u;
unsigned lastAttrib = ~0u;
for (;;) {
switch (formatter.PeekNext()) {
case Formatter::Blob::AttributeName:
{
Formatter::InteriorSection name, value;
if (formatter.TryAttribute(name, value)) {
_attributes.push_back(AttributeDesc{name, value, ~0u});
if (lastAttrib != ~0u) {
_attributes[lastAttrib]._nextSibling = unsigned(_attributes.size()-1);
} else {
_firstRootAttribute = unsigned(_attributes.size()-1);
}
lastAttrib = unsigned(_attributes.size()-1);
}
}
continue;
case Formatter::Blob::BeginElement:
{
auto newEle = ParseElement(formatter);
if (newEle == ~0u) break;
if (lastEle != ~0u) _elements[lastEle]._nextSibling = newEle;
lastEle = newEle;
}
continue;
default:
break;
}
break;
}
// Sometimes we serialize in some elements as a "Document"
// In these cases, there may be more data in the file...
// if (formatter.PeekNext() != Formatter::Blob::None)
// Throw(FormatException(
// "Unexpected trailing characters in StreamDOM", formatter.GetLocation()));
}
unsigned Document<Formatter>::ParseElement(Formatter& formatter)
{
Formatter::InteriorSection section;
if (!formatter.TryBeginElement(section))
return ~0u;
unsigned e = ~0u;
{
ElementDesc newElement;
newElement._name = section;
newElement._firstAttribute = ~0u;
newElement._firstChild = ~0u;
newElement._nextSibling = ~0u;
_elements.push_back(newElement);
e = (unsigned)_elements.size()-1;
}
auto lastChild = ~0u;
auto lastAttribute = ~0u;
for (;;) {
auto next = formatter.PeekNext();
if (next == Formatter::Blob::BeginElement) {
auto newElement = ParseElement(formatter);
if (lastChild == ~0u) {
_elements[e]._firstChild = newElement;
} else {
_elements[lastChild]._nextSibling = newElement;
}
lastChild = newElement;
} else if (next == Formatter::Blob::AttributeName) {
Formatter::InteriorSection name;
Formatter::InteriorSection value;
if (!formatter.TryAttribute(name, value))
Throw(FormatException(
"Error while reading attribute in StreamDOM", formatter.GetLocation()));
AttributeDesc attrib;
attrib._name = name;
attrib._value = value;
attrib._nextSibling = ~0u;
_attributes.push_back(attrib);
auto a = (unsigned)_attributes.size()-1;
if (lastAttribute == ~0u) {
_elements[e]._firstAttribute = a;
} else {
_attributes[lastAttribute]._nextSibling = a;
}
lastAttribute = a;
} else if (next == Formatter::Blob::EndElement) {
break;
} else {
Throw(FormatException(
StringMeld<128>() << "Got unexpected blob type (" << unsigned(next) << ") while parsing element in StreamDOM",
formatter.GetLocation()));
}
}
if (!formatter.TryEndElement())
Throw(FormatException(
"Expected end element in StreamDOM", formatter.GetLocation()));
return e;
}
void AccessorDeserialize(
Formatter& formatter,
void* obj, const ClassAccessors& props)
{
using Blob = Formatter::Blob;
using CharType = Formatter::value_type;
auto charTypeCat = ImpliedTyping::TypeOf<CharType>()._type;
for (;;) {
switch (formatter.PeekNext()) {
case Blob::AttributeName:
{
typename Formatter::InteriorSection name, value;
if (!formatter.TryAttribute(name, value))
Throw(FormatException("Error in begin element", formatter.GetLocation()));
auto arrayBracket = std::find(name._start, name._end, '[');
if (arrayBracket == name._end) {
if (!props.TryOpaqueSet(
obj,
Hash64(name._start, name._end), value._start,
ImpliedTyping::TypeDesc(charTypeCat, uint16(value._end - value._start)), true)) {
LogWarning << "Failure while assigning property during deserialization -- " <<
Conversion::Convert<std::string>(std::basic_string<CharType>(name._start, name._end));
}
} else {
auto arrayIndex = XlAtoUI32((const char*)(arrayBracket+1));
if (!props.TryOpaqueSet(
obj, Hash64(name._start, arrayBracket), arrayIndex, value._start,
ImpliedTyping::TypeDesc(charTypeCat, uint16(value._end - value._start)), true)) {
LogWarning << "Failure while assigning array property during deserialization -- " <<
Conversion::Convert<std::string>(std::basic_string<CharType>(name._start, name._end));
}
}
}
break;
case Blob::EndElement:
case Blob::None:
return;
case Blob::BeginElement:
{
typename Formatter::InteriorSection eleName;
if (!formatter.TryBeginElement(eleName))
Throw(FormatException("Error in begin element", formatter.GetLocation()));
auto created = props.TryCreateChild(obj, Hash64(eleName._start, eleName._end));
if (created.first) {
AccessorDeserialize(formatter, created.first, *created.second);
} else {
LogWarning << "Couldn't find a match for element name during deserialization -- " <<
Conversion::Convert<std::string>(std::basic_string<CharType>(eleName._start, eleName._end));
formatter.SkipElement();
}
if (!formatter.TryEndElement())
Throw(FormatException("Expecting end element", formatter.GetLocation()));
break;
}
}
}
}
