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// Copyright (C) 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef ICING_JOIN_DOCUMENT_ID_TO_JOIN_INFO_H_
#define ICING_JOIN_DOCUMENT_ID_TO_JOIN_INFO_H_
#include <utility>
#include "icing/store/document-id.h"
namespace icing {
namespace lib {
// DocumentIdToJoinInfo is composed of document_id and its join info.
// - QualifiedId join: join info is the referenced document's namespace_id +
// fingerprint(uri).
// - String join: join info is the term id.
// - Integer join: join info is the integer.
//
// DocumentIdToJoinInfo will be stored in posting list.
template <typename JoinInfoType>
class DocumentIdToJoinInfo {
public:
static DocumentIdToJoinInfo<JoinInfoType> GetInvalid() {
return DocumentIdToJoinInfo<JoinInfoType>(kInvalidDocumentId,
JoinInfoType());
}
explicit DocumentIdToJoinInfo(DocumentId document_id, JoinInfoType join_info)
: document_id_(document_id), join_info_(std::move(join_info)) {}
DocumentId document_id() const { return document_id_; }
const JoinInfoType& join_info() const { return join_info_; }
bool is_valid() const { return IsDocumentIdValid(document_id_); }
bool operator<(const DocumentIdToJoinInfo<JoinInfoType>& other) const {
if (document_id_ != other.document_id_) {
return document_id_ < other.document_id_;
}
return join_info_ < other.join_info_;
}
bool operator==(const DocumentIdToJoinInfo<JoinInfoType>& other) const {
return document_id_ == other.document_id_ && join_info_ == other.join_info_;
}
private:
DocumentId document_id_;
JoinInfoType join_info_;
} __attribute__((packed));
} // namespace lib
} // namespace icing
#endif // ICING_JOIN_DOCUMENT_ID_TO_JOIN_INFO_H_
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