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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "fieldpathupdates.h"
#include <vespa/document/datatype/datatype.h>
#include <vespa/document/fieldvalue/document.h>
#include <vespa/document/fieldvalue/iteratorhandler.h>
#include <vespa/document/select/constant.h>
#include <vespa/document/select/parser.h>
#include <vespa/document/select/parsing_failed_exception.h>
#include <vespa/document/util/serializableexceptions.h>
#include <vespa/vespalib/objects/nbostream.h>
#include <ostream>
#include <vespa/log/log.h>
LOG_SETUP(".document.update.fieldpathupdate");
using document::select::ParsingFailedException;
using vespalib::make_string;
using vespalib::IllegalArgumentException;
namespace document {
using namespace fieldvalue;
namespace {
std::unique_ptr<select::Node>
parseDocumentSelection(vespalib::stringref query, const DocumentTypeRepo& repo)
{
BucketIdFactory factory;
try {
select::Parser parser(repo, factory);
return parser.parse(query);
} catch (const ParsingFailedException &e) {
LOG(warning, "Failed to parse selection for field path update: %s", e.getMessage().c_str());
return std::make_unique<select::Constant>(false);
}
}
} // namespace
FieldPathUpdate::FieldPathUpdate(FieldPathUpdateType type) noexcept
: _type(type),
_originalFieldPath(),
_originalWhereClause()
{ }
FieldPathUpdate::FieldPathUpdate(const FieldPathUpdate &) = default;
FieldPathUpdate & FieldPathUpdate::operator =(const FieldPathUpdate &) = default;
FieldPathUpdate::FieldPathUpdate(FieldPathUpdateType type, stringref fieldPath, stringref whereClause)
: _type(type),
_originalFieldPath(fieldPath),
_originalWhereClause(whereClause)
{ }
FieldPathUpdate::~FieldPathUpdate() = default;
bool
FieldPathUpdate::operator==(const FieldPathUpdate& other) const
{
return (_type == other._type)
&& (other._originalFieldPath == _originalFieldPath)
&& (other._originalWhereClause == _originalWhereClause);
}
void
FieldPathUpdate::applyTo(Document& doc) const
{
std::unique_ptr<IteratorHandler> handler(getIteratorHandler(doc, *doc.getRepo()));
FieldPath path;
doc.getDataType()->buildFieldPath(path, _originalFieldPath);
if (_originalWhereClause.empty()) {
doc.iterateNested(path, *handler);
} else {
std::unique_ptr<select::Node> whereClause = parseDocumentSelection(_originalWhereClause, *doc.getRepo());
select::ResultList results = whereClause->contains(doc);
for (auto i = results.rbegin(); i != results.rend(); ++i) {
LOG(spam, "vars = %s", handler->getVariables().toString().c_str());
if (*i->second == select::Result::True) {
handler->setVariables(std::move(i->first));
doc.iterateNested(path, *handler);
}
}
}
}
void
FieldPathUpdate::print(std::ostream& out, bool, const std::string& indent) const
{
out << indent << "fieldPath='" << _originalFieldPath << "',\n"
<< indent << "whereClause='" << _originalWhereClause << "'";
}
void
FieldPathUpdate::checkCompatibility(const FieldValue& fv, const DataType & type) const
{
FieldPath path;
type.buildFieldPath(path, _originalFieldPath);
if ( !getResultingDataType(path).isValueType(fv)) {
throw IllegalArgumentException(
make_string("Cannot update a '%s' field with a '%s' value",
getResultingDataType(path).toString().c_str(),
fv.getDataType()->toString().c_str()),
VESPA_STRLOC);
}
}
const DataType&
FieldPathUpdate::getResultingDataType(const FieldPath & path) const
{
if (path.empty()) {
throw vespalib::IllegalStateException("Cannot get resulting data type from an empty field path", VESPA_STRLOC);
}
return path.back().getDataType();
}
vespalib::stringref
FieldPathUpdate::getString(nbostream & stream)
{
uint32_t sz(0);
stream >> sz;
vespalib::stringref s(stream.peek(), sz - 1);
stream.adjustReadPos(sz);
return s;
}
void
FieldPathUpdate::deserialize(const DocumentTypeRepo&, const DataType&, nbostream & stream)
{
_originalFieldPath = getString(stream);
_originalWhereClause = getString(stream);
}
std::unique_ptr<FieldPathUpdate>
FieldPathUpdate::createInstance(const DocumentTypeRepo& repo, const DataType &type, nbostream& stream)
{
unsigned char updateType = 0;
stream >> updateType;
std::unique_ptr<FieldPathUpdate> update;
switch (updateType) {
case 0:
update.reset(new AssignFieldPathUpdate());
break;
case 1:
update.reset(new RemoveFieldPathUpdate());
break;
case 2:
update.reset(new AddFieldPathUpdate());
break;
default:
throw DeserializeException(make_string("Unknown fieldpath update type: %d", updateType), VESPA_STRLOC);
}
update->deserialize(repo, type, stream);
return update;
}
}
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