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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "arithmeticvalueupdate.h"
#include <vespa/document/base/field.h>
#include <vespa/document/fieldvalue/fieldvalues.h>
#include <vespa/vespalib/util/exceptions.h>
#include <vespa/vespalib/util/xmlstream.h>
#include <ostream>
using vespalib::IllegalArgumentException;
using vespalib::IllegalStateException;
using namespace vespalib::xml;
namespace document {
// Declare string representations for operator names.
static const char * operatorName[] = { "add", "div", "mul", "sub" };
static const char * operatorNameC[] = { "Add", "Div", "Mul", "Sub" };
bool
ArithmeticValueUpdate::operator==(const ValueUpdate& other) const
{
if (other.getType() != Arithmetic) return false;
const ArithmeticValueUpdate& o(static_cast<const ArithmeticValueUpdate&>(other));
if (_operator != o._operator) return false;
if (_operand != o._operand) return false;
return true;
}
// Ensure that this update is compatible with given field.
void
ArithmeticValueUpdate::checkCompatibility(const Field& field) const
{
if ( ! field.getDataType().isNumeric()) {
throw IllegalArgumentException(vespalib::make_string(
"Can not perform arithmetic update on non-numeric field '%s'.",
field.getName().data()), VESPA_STRLOC);
}
}
// Apply this update.
bool
ArithmeticValueUpdate::applyTo(FieldValue& value) const
{
if (value.isA(FieldValue::Type::BYTE)) {
ByteFieldValue& bValue = static_cast<ByteFieldValue&>(value);
bValue.setValue((int)applyTo(static_cast<int64_t>(bValue.getAsInt())));
} else if (value.isA(FieldValue::Type::DOUBLE)) {
DoubleFieldValue& dValue = static_cast<DoubleFieldValue&>(value);
dValue.setValue(applyTo(dValue.getAsDouble()));
} else if (value.isA(FieldValue::Type::FLOAT)) {
FloatFieldValue& fValue = static_cast<FloatFieldValue&>(value);
fValue.setValue((float)applyTo(fValue.getAsFloat()));
} else if (value.isA(FieldValue::Type::INT)) {
IntFieldValue& iValue = static_cast<IntFieldValue&>(value);
iValue.setValue((int)applyTo(static_cast<int64_t>(iValue.getAsInt())));
} else if (value.isA(FieldValue::Type::LONG)) {
LongFieldValue& lValue = static_cast<LongFieldValue&>(value);
lValue.setValue(applyTo(lValue.getAsLong()));
} else {
vespalib::string err = vespalib::make_string(
"Unable to perform an arithmetic update on a \"%s\" field "
"value.", value.className());
throw IllegalStateException(err, VESPA_STRLOC);
}
return true;
}
// Perform the contained operation on the given value.
double
ArithmeticValueUpdate::applyTo(double value) const
{
switch(_operator) {
case Add:
return value + _operand;
case Div:
return value / _operand;
case Mul:
return value * _operand;
case Sub:
return value - _operand;
default:
return 0;
}
}
// Perform the contained operation on the given value.
long
ArithmeticValueUpdate::applyTo(int64_t value) const
{
switch(_operator) {
case Add:
return (long)(value + _operand);
case Div:
return (long)(value / _operand);
case Mul:
return (long)(value * _operand);
case Sub:
return (long)(value - _operand);
default:
return 0;
}
}
// Perform the contained operation on the given value.
std::string
ArithmeticValueUpdate::applyTo(const std::string & value) const
{
return value;
}
// Print this update as a human readable string.
void
ArithmeticValueUpdate::print(std::ostream& out, bool, const std::string& indent) const
{
out << indent << "ArithmeticValueUpdate(" << operatorNameC[_operator] << " " << _operand << ")";
}
void
ArithmeticValueUpdate::printXml(XmlOutputStream& xos) const
{
xos << XmlTag(operatorName[_operator])
<< XmlAttribute("by", _operand)
<< XmlEndTag();
}
// Deserialize this update from the given buffer.
void
ArithmeticValueUpdate::deserialize(const DocumentTypeRepo&, const DataType&, nbostream & stream)
{
int32_t opt;
stream >> opt >>_operand;
_operator = static_cast<ArithmeticValueUpdate::Operator>(opt);
}
} // document
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