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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "string_field_builder.h"
#include "doc_builder.h"
#include <vespa/document/annotation/annotation.h>
#include <vespa/document/annotation/span.h>
#include <vespa/document/annotation/spanlist.h>
#include <vespa/document/annotation/spantree.h>
#include <vespa/document/fieldvalue/stringfieldvalue.h>
#include <vespa/searchlib/util/linguisticsannotation.h>
#include <vespa/fastlib/text/unicodeutil.h>
#include <vespa/vespalib/text/utf8.h>
#include <cassert>
using document::Annotation;
using document::AnnotationType;
using document::FixedTypeRepo;
using document::StringFieldValue;
using document::Span;
using document::SpanList;
using document::SpanNode;
using document::SpanTree;
using vespalib::Utf8Reader;
using vespalib::Utf8Writer;
using search::linguistics::SPANTREE_NAME;
namespace search::test {
StringFieldBuilder::StringFieldBuilder(const DocBuilder& doc_builder)
: _value(),
_span_start(0u),
_span_list(nullptr),
_span_tree(),
_last_span(nullptr),
_repo(doc_builder.get_repo(), doc_builder.get_document_type())
{
}
StringFieldBuilder::~StringFieldBuilder() = default;
void
StringFieldBuilder::start_annotate()
{
auto span_list_up = std::make_unique<SpanList>();
_span_list = span_list_up.get();
_span_tree = std::make_unique<SpanTree>(SPANTREE_NAME, std::move(span_list_up));
}
void
StringFieldBuilder::add_span()
{
assert(_value.size() > _span_start);
const SpanNode &span = _span_list->add(std::make_unique<Span>(_span_start, _value.size() - _span_start));
_last_span = &span;
_span_start = _value.size();
}
StringFieldBuilder&
StringFieldBuilder::token(const vespalib::string& val, bool is_word)
{
if (val.empty()) {
return *this;
}
if (!_span_tree) {
start_annotate();
}
_span_start = _value.size();
_value.append(val);
add_span();
if (is_word) {
_span_tree->annotate(*_last_span, *AnnotationType::TERM);
}
return *this;
}
StringFieldBuilder&
StringFieldBuilder::alt_word(const vespalib::string& val)
{
assert(_last_span != nullptr);
_span_tree->annotate(*_last_span,
Annotation(*AnnotationType::TERM,
std::make_unique<StringFieldValue>(val)));
return *this;
}
StringFieldBuilder&
StringFieldBuilder::tokenize(const vespalib::string& val)
{
Utf8Reader reader(val);
vespalib::string token_buffer;
Utf8Writer writer(token_buffer);
uint32_t c = 0u;
bool old_word = false;
while (reader.hasMore()) {
c = reader.getChar();
bool new_word = Fast_UnicodeUtil::IsWordChar(c);
if (old_word != new_word) {
if (!token_buffer.empty()) {
token(token_buffer, old_word);
token_buffer.clear();
}
old_word = new_word;
}
writer.putChar(c);
}
if (!token_buffer.empty()) {
token(token_buffer, old_word);
}
return *this;
}
document::StringFieldValue
StringFieldBuilder::build()
{
StringFieldValue value(_value);
// Also drop all spans no annotation for now
if (_span_tree && _span_tree->numAnnotations() > 0u) {
StringFieldValue::SpanTrees trees;
trees.emplace_back(std::move(_span_tree));
value.setSpanTrees(trees, _repo);
} else {
_span_tree.reset();
}
_span_list = nullptr;
_last_span = nullptr;
_span_start = 0u;
_value.clear();
return value;
}
}
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