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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "query_term_simple.h"
#include <atomic>
namespace search {
/**
* Query term that can be returned in UCS-4 encoded form.
*/
class QueryTermUCS4 : public QueryTermSimple {
public:
using ucs4_t = uint32_t;
QueryTermUCS4(const QueryTermUCS4 &) = delete;
QueryTermUCS4 & operator = (const QueryTermUCS4 &) = delete;
QueryTermUCS4(QueryTermUCS4 &&) = delete;
QueryTermUCS4 & operator = (QueryTermUCS4 &&) = delete;
QueryTermUCS4(const string & term_, Type type);
~QueryTermUCS4() override;
uint32_t getTermLen() const { return _cachedTermLen; }
uint32_t term(const char * & t) const { t = getTerm(); return _cachedTermLen; }
void visitMembers(vespalib::ObjectVisitor &visitor) const override;
std::unique_ptr<ucs4_t[]> asUcs4() const;
uint32_t term(const ucs4_t * & t) {
t = _termUCS4.load(std::memory_order_relaxed);
if (t == nullptr) {
t = fillUCS4();
}
return _cachedTermLen;
}
private:
const ucs4_t * fillUCS4();
std::atomic<ucs4_t *> _termUCS4;
uint32_t _cachedTermLen;
};
}
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