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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "assignvalueupdate.h"
#include <vespa/document/base/field.h>
#include <vespa/document/fieldvalue/fieldvalues.h>
#include <vespa/document/serialization/vespadocumentdeserializer.h>
#include <vespa/vespalib/objects/nbostream.h>
#include <vespa/vespalib/util/exceptions.h>
#include <vespa/vespalib/util/xmlstream.h>
#include <ostream>
using vespalib::IllegalArgumentException;
using vespalib::IllegalStateException;
using vespalib::nbostream;
using namespace vespalib::xml;
namespace document {
AssignValueUpdate::AssignValueUpdate()
: ValueUpdate(Assign),
_value()
{}
AssignValueUpdate::AssignValueUpdate(std::unique_ptr<FieldValue> value)
: ValueUpdate(Assign),
_value(std::move(value))
{
}
AssignValueUpdate::~AssignValueUpdate() = default;
// Declare content bits.
static const unsigned char CONTENT_HASVALUE = 0x01;
bool
AssignValueUpdate::operator==(const ValueUpdate& other) const
{
if (other.getType() != Assign) return false;
const AssignValueUpdate& o(static_cast<const AssignValueUpdate&>(other));
if (_value && o._value) {
return *_value == *o._value;
} else {
return bool(_value) == bool(o._value);
}
}
// Ensure that this update is compatible with given field.
void
AssignValueUpdate::checkCompatibility(const Field& field) const
{
// If equal datatype we know it is ok.
if (!_value || field.getDataType().isValueType(*_value)) {
return;
}
// Deny all assignments to non-equal types
throw IllegalArgumentException(vespalib::make_string(
"Failed to assign field value of type %s to value of type %s.",
_value->getDataType()->toString().c_str(),
field.getDataType().toString().c_str()), VESPA_STRLOC);
}
// Print this update as a human readable string.
void
AssignValueUpdate::print(std::ostream& out, bool verbose, const std::string& indent) const
{
out << indent << "AssignValueUpdate(";
if (_value) _value->print(out, verbose, indent);
out << ")";
}
// Apply this update to the given document.
bool
AssignValueUpdate::applyTo(FieldValue& value) const
{
if (_value && (_value->getDataType() != value.getDataType()) &&
((value.getDataType() == nullptr) ||
!value.getDataType()->isValueType(*_value))) {
vespalib::string err = vespalib::make_string(
"Unable to assign a \"%s\" value to a \"%s\" field value.",
_value->className(), value.className());
throw IllegalStateException(err, VESPA_STRLOC);
}
if (_value) {
value.assign(*_value);
}
return bool(_value);
}
void
AssignValueUpdate::printXml(XmlOutputStream& xos) const
{
xos << XmlTag("assign");
if (_value) {
_value->printXml(xos);
}
xos << XmlEndTag();
}
// Deserialize this update from the given buffer.
void
AssignValueUpdate::deserialize(const DocumentTypeRepo& repo, const DataType& type, nbostream & stream)
{
// Read content bit vector.
uint8_t content = 0x00;
stream >> content;
// Read field value, if any.
if (content & CONTENT_HASVALUE) {
_value.reset(type.createFieldValue().release());
VespaDocumentDeserializer deserializer(repo, stream, Document::getNewestSerializationVersion());
deserializer.read(*_value);
}
}
} // namespace document
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