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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "posocc_field_params.h"
#include <vespa/searchcommon/common/schema.h>
#include <vespa/searchlib/index/postinglistparams.h>
#include <vespa/vespalib/data/fileheader.h>
#include <vespa/vespalib/stllike/asciistream.h>
#include <cassert>
#include <vespa/log/log.h>
LOG_SETUP(".posocc_field_params");
using vespalib::GenericHeader;
namespace search::bitcompression {
namespace schema = search::index::schema;
PosOccFieldParams::PosOccFieldParams()
: _elemLenK(0),
_hasElements(false),
_hasElementWeights(false),
_avgElemLen(512),
_collectionType(SINGLE),
_name(),
_field_length_info()
{ }
bool
PosOccFieldParams::operator==(const PosOccFieldParams &rhs) const
{
return _collectionType == rhs._collectionType &&
_avgElemLen == rhs._avgElemLen &&
_name == rhs._name;
}
vespalib::string
PosOccFieldParams::getParamsPrefix(uint32_t idx)
{
vespalib::asciistream paramsPrefix;
paramsPrefix << "fieldParams.";
paramsPrefix << idx;
return paramsPrefix.str();
}
void
PosOccFieldParams::getParams(PostingListParams ¶ms, uint32_t idx) const
{
vespalib::string paramsPrefix = getParamsPrefix(idx);
vespalib::string collStr = paramsPrefix + ".collectionType";
vespalib::string avgElemLenStr = paramsPrefix + ".avgElemLen";
vespalib::string nameStr = paramsPrefix + ".name";
switch (_collectionType) {
case SINGLE:
params.setStr(collStr, "single");
break;
case ARRAY:
params.setStr(collStr, "array");
break;
case WEIGHTEDSET:
params.setStr(collStr, "weightedSet");
break;
}
params.set(avgElemLenStr, _avgElemLen);
params.setStr(nameStr, _name);
}
void
PosOccFieldParams::setParams(const PostingListParams ¶ms, uint32_t idx)
{
vespalib::string paramsPrefix = getParamsPrefix(idx);
vespalib::string collStr = paramsPrefix + ".collectionType";
vespalib::string avgElemLenStr = paramsPrefix + ".avgElemLen";
vespalib::string nameStr = paramsPrefix + ".name";
if (params.isSet(collStr)) {
vespalib::string collVal = params.getStr(collStr);
if (collVal == "single") {
_collectionType = SINGLE;
_hasElements = false;
_hasElementWeights = false;
} else if (collVal == "array") {
_collectionType = ARRAY;
_hasElements = true;
_hasElementWeights = false;
} else if (collVal == "weightedSet") {
_collectionType = WEIGHTEDSET;
_hasElements = true;
_hasElementWeights = true;
}
}
params.get(avgElemLenStr, _avgElemLen);
if (params.isSet(nameStr)) {
_name = params.getStr(nameStr);
}
}
void
PosOccFieldParams::setSchemaParams(const Schema &schema, uint32_t fieldId)
{
assert(fieldId < schema.getNumIndexFields());
const Schema::IndexField &field = schema.getIndexField(fieldId);
switch (field.getCollectionType()) {
case schema::CollectionType::SINGLE:
_collectionType = SINGLE;
_hasElements = false;
_hasElementWeights = false;
break;
case schema::CollectionType::ARRAY:
_collectionType = ARRAY;
_hasElements = true;
_hasElementWeights = false;
break;
case schema::CollectionType::WEIGHTEDSET:
_collectionType = WEIGHTEDSET;
_hasElements = true;
_hasElementWeights = true;
break;
default:
LOG(error, "Bad collection type");
LOG_ABORT("should not be reached");
}
_avgElemLen = field.getAvgElemLen();
_name = field.getName();
}
namespace {
vespalib::string field_length_infix = "field_length.";
struct FieldLengthKeys {
vespalib::string _average;
vespalib::string _samples;
FieldLengthKeys(const vespalib::string &prefix);
~FieldLengthKeys();
};
FieldLengthKeys::FieldLengthKeys(const vespalib::string &prefix)
: _average(prefix + field_length_infix + "average"),
_samples(prefix + field_length_infix + "samples")
{
}
FieldLengthKeys::~FieldLengthKeys() = default;
}
void
PosOccFieldParams::readHeader(const GenericHeader &header,
const vespalib::string &prefix)
{
using Tag = GenericHeader::Tag;
vespalib::string nameKey(prefix + "fieldName");
vespalib::string collKey(prefix + "collectionType");
vespalib::string avgElemLenKey(prefix + "avgElemLen");
FieldLengthKeys field_length_keys(prefix);
_name = header.getTag(nameKey).asString();
Schema::CollectionType ct = schema::collectionTypeFromName(header.getTag(collKey).asString());
switch (ct) {
case schema::CollectionType::SINGLE:
_collectionType = SINGLE;
_hasElements = false;
_hasElementWeights = false;
break;
case schema::CollectionType::ARRAY:
_collectionType = ARRAY;
_hasElements = true;
_hasElementWeights = false;
break;
case schema::CollectionType::WEIGHTEDSET:
_collectionType = WEIGHTEDSET;
_hasElements = true;
_hasElementWeights = true;
break;
default:
LOG_ABORT("Bad collection type when reading field param in header");
}
_avgElemLen = header.getTag(avgElemLenKey).asInteger();
if (header.hasTag(field_length_keys._average) &&
header.hasTag(field_length_keys._samples)) {
const auto &average_field_length_tag = header.getTag(field_length_keys._average);
const auto &field_length_samples_tag = header.getTag(field_length_keys._samples);
if (average_field_length_tag.getType() == Tag::Type::TYPE_FLOAT &&
field_length_samples_tag.getType() == Tag::Type::TYPE_INTEGER) {
_field_length_info = index::FieldLengthInfo(average_field_length_tag.asFloat(), field_length_samples_tag.asInteger());
}
}
}
void
PosOccFieldParams::writeHeader(GenericHeader &header,
const vespalib::string &prefix) const
{
using Tag = GenericHeader::Tag;
vespalib::string nameKey(prefix + "fieldName");
vespalib::string collKey(prefix + "collectionType");
vespalib::string avgElemLenKey(prefix + "avgElemLen");
FieldLengthKeys field_length_keys(prefix);
header.putTag(Tag(nameKey, _name));
Schema::CollectionType ct(schema::CollectionType::SINGLE);
switch (_collectionType) {
case SINGLE:
ct = schema::CollectionType::SINGLE;
break;
case ARRAY:
ct = schema::CollectionType::ARRAY;
break;
case WEIGHTEDSET:
ct = schema::CollectionType::WEIGHTEDSET;
break;
default:
LOG_ABORT("Bad collection type when writing field param in header");
}
header.putTag(Tag(collKey, schema::getTypeName(ct)));
header.putTag(Tag(avgElemLenKey, _avgElemLen));
header.putTag(Tag(field_length_keys._average, _field_length_info.get_average_field_length()));
header.putTag(Tag(field_length_keys._samples, static_cast<int64_t>(_field_length_info.get_num_samples())));
}
}
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