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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "fieldsetrepo.h"
#include <vespa/vespalib/text/stringtokenizer.h>
#include <vespa/vespalib/util/exceptions.h>
#include <vespa/vespalib/stllike/asciistream.h>
#include <vespa/document/repo/documenttyperepo.h>
#include <vespa/document/base/exceptions.h>
#include <vespa/vespalib/stllike/hash_map.hpp>
#include <vespa/log/log.h>
LOG_SETUP(".document.fieldset.fieldsetrepo");
using vespalib::StringTokenizer;
namespace document {
namespace {
FieldSet::SP
parseSpecialValues(vespalib::stringref name)
{
if ((name.size() == 4) && (name[1] == 'i') && (name[2] == 'd') && (name[3] == ']')) {
return std::make_shared<DocIdOnly>();
} else if ((name.size() == 5) && (name[1] == 'a') && (name[2] == 'l') && (name[3] == 'l') && (name[4] == ']')) {
return std::make_shared<AllFields>();
} else if ((name.size() == 6) && (name[1] == 'n') && (name[2] == 'o') && (name[3] == 'n') && (name[4] == 'e') && (name[5] == ']')) {
return std::make_shared<NoFields>();
} else if ((name.size() == 7) && (name[1] == 'd') && (name[2] == 'o') && (name[3] == 'c') && (name[4] == 'i') && (name[5] == 'd') && (name[6] == ']')) {
return std::make_shared<DocIdOnly>();
} else if (name.size() == 10 && name == DocumentOnly::NAME) {
return std::make_shared<DocumentOnly>();
} else {
throw vespalib::IllegalArgumentException(
"The only special names (enclosed in '[]') allowed are "
"id, all, none, docid, document; but not '" + name + "'.");
}
}
FieldSet::SP
parseFieldCollection(const DocumentTypeRepo& repo,
vespalib::stringref docType,
vespalib::stringref fieldNames)
{
const DocumentType* typePtr = repo.getDocumentType(docType);
if (!typePtr) {
throw vespalib::IllegalArgumentException("Unknown document type " + docType);
}
const DocumentType& type(*typePtr);
StringTokenizer tokenizer(fieldNames, ",");
Field::Set::Builder builder;
for (const auto & token : tokenizer) {
const DocumentType::FieldSet * fs = type.getFieldSet(token);
if (fs) {
for (const auto & fieldName : fs->getFields()) {
builder.add(&type.getField(fieldName));
}
} else {
builder.add(&type.getField(token));
}
}
return std::make_shared<FieldCollection>(type, builder.build());
}
}
FieldSet::SP
FieldSetRepo::parse(const DocumentTypeRepo& repo, vespalib::stringref str)
{
if (str[0] == '[') {
return parseSpecialValues(str);
} else {
StringTokenizer tokenizer(str, ":");
if (tokenizer.size() != 2) {
throw vespalib::IllegalArgumentException(
"The field set list must consist of a document type, "
"then a colon (:), then a comma-separated list of field names");
}
return parseFieldCollection(repo, tokenizer[0], tokenizer[1]);
}
}
vespalib::string
FieldSetRepo::serialize(const FieldSet& fieldSet)
{
switch (fieldSet.getType()) {
case FieldSet::Type::FIELD:
return static_cast<const Field&>(fieldSet).getName();
case FieldSet::Type::SET: {
const auto & collection = static_cast<const FieldCollection&>(fieldSet);
vespalib::asciistream stream;
stream << collection.getDocumentType().getName() << ":";
bool first = true;
for (const Field * field : collection.getFields()) {
if (first) {
first = false;
} else {
stream << ",";
}
stream << field->getName();
}
return stream.str();
}
case FieldSet::Type::ALL:
return AllFields::NAME;
case FieldSet::Type::NONE:
return NoFields::NAME;
case FieldSet::Type::DOCID:
return DocIdOnly::NAME;
case FieldSet::Type::DOCUMENT_ONLY:
return DocumentOnly::NAME;
default:
return "";
}
}
FieldSetRepo::FieldSetRepo(const DocumentTypeRepo& repo)
: _doumentTyperepo(repo),
_configuredFieldSets()
{
repo.forEachDocumentType([&](const DocumentType &type) {
configureDocumentType(type);
});
}
FieldSetRepo::~FieldSetRepo() = default;
void
FieldSetRepo::configureDocumentType(const DocumentType & documentType) {
for (const auto & entry : documentType.getFieldSets()) {
vespalib::string fieldSetName(documentType.getName());
fieldSetName.append(':').append(entry.first);
try {
auto fieldset = parse(_doumentTyperepo, fieldSetName);
_configuredFieldSets[fieldSetName] = std::move(fieldset);
} catch (const FieldNotFoundException & ex) {
// Just silently skip it so error handling can be done when you can return proper error to user.
}
}
}
FieldSet::SP
FieldSetRepo::getFieldSet(vespalib::stringref fieldSetString) const {
auto found = _configuredFieldSets.find(fieldSetString);
if (found != _configuredFieldSets.end()) {
return found->second;
}
return parse(_doumentTyperepo, fieldSetString);
}
}
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