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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "fieldupdate.h"
#include <vespa/document/base/exceptions.h>
#include <vespa/document/fieldvalue/document.h>
#include <vespa/document/datatype/documenttype.h>
#include <vespa/vespalib/objects/nbostream.h>
#include <ostream>
namespace document {
using vespalib::nbostream;
FieldUpdate::FieldUpdate(const Field& field)
: _field(field),
_updates()
{
}
namespace {
int readInt(nbostream & stream) {
int tmp;
stream >> tmp;
return tmp;
}
}
FieldUpdate::FieldUpdate(const DocumentTypeRepo& repo, const DataType & type, nbostream & stream)
: _field(type.getField(readInt(stream))),
_updates()
{
int numUpdates = readInt(stream);
_updates.reserve(numUpdates);
const DataType& dataType = _field.getDataType();
for(int i(0); i < numUpdates; i++) {
_updates.emplace_back(ValueUpdate::createInstance(repo, dataType, stream));
}
}
FieldUpdate::~FieldUpdate() = default;
bool
FieldUpdate::operator==(const FieldUpdate& other) const
{
if (_field != other._field) return false;
if (_updates.size() != other._updates.size()) return false;
for (uint32_t i=0, n=_updates.size(); i<n; ++i) {
if (*_updates[i] != *other._updates[i]) return false;
}
return true;
}
FieldUpdate&
FieldUpdate::addUpdate(std::unique_ptr<ValueUpdate> update) & {
update->checkCompatibility(_field); // May throw exception.
_updates.push_back(std::move(update));
return *this;
}
FieldUpdate&&
FieldUpdate::addUpdate(std::unique_ptr<ValueUpdate> update) && {
addUpdate(std::move(update));
return std::move(*this);
}
void
FieldUpdate::printXml(XmlOutputStream& xos) const
{
for(const auto & update : _updates) {
update->printXml(xos);
}
}
// Apply this field update to the given document.
void
FieldUpdate::applyTo(Document& doc) const
{
const DataType& datatype = _field.getDataType();
FieldValue::UP value = doc.getValue(_field);
for (const auto & update : _updates) {
if ( ! value) {
// Avoid passing a null pointer to a value update.
value = datatype.createFieldValue();
}
if (!update->applyTo(*value)) {
value.reset();
}
}
if (value) {
doc.setFieldValue(_field, std::move(value));
} else {
doc.remove(_field);
}
}
// Print this field update as a human readable string.
void
FieldUpdate::print(std::ostream& out, bool verbose, const std::string& indent) const
{
out << "FieldUpdate(" << _field.toString(verbose);
for(const auto & update : _updates) {
out << "\n" << indent << " ";
update->print(out, verbose, indent + " ");
}
if (_updates.size() > 0) {
out << "\n" << indent;
}
out << ")";
}
// Deserialize this field update from the given buffer.
void
FieldUpdate::deserialize(const DocumentTypeRepo& repo, const DocumentType& docType, nbostream& stream)
{
int fieldId = readInt(stream);
_field = docType.getField(fieldId);
const DataType& dataType = _field.getDataType();
int numUpdates = readInt(stream);
_updates.clear();
_updates.resize(numUpdates);
for(int i = 0; i < numUpdates; i++) {
_updates[i].reset(ValueUpdate::createInstance(repo, dataType, stream).release());
}
}
} // namespace document
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