1 files changed, 96 insertions, 0 deletions
diff --git a/icing/join/qualified-id-joinable-property-indexing-handler.cc b/icing/join/qualified-id-joinable-property-indexing-handler.cc
new file mode 100644
index 0000000..0b28444
--- /dev/null
+++ b/icing/join/qualified-id-joinable-property-indexing-handler.cc
@@ -0,0 +1,96 @@
+// 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.
+
+#include "icing/join/qualified-id-joinable-property-indexing-handler.h"
+
+#include <memory>
+#include <string_view>
+
+#include "icing/text_classifier/lib3/utils/base/status.h"
+#include "icing/absl_ports/canonical_errors.h"
+#include "icing/join/doc-join-info.h"
+#include "icing/join/qualified-id-type-joinable-index.h"
+#include "icing/join/qualified-id.h"
+#include "icing/legacy/core/icing-string-util.h"
+#include "icing/proto/logging.pb.h"
+#include "icing/store/document-id.h"
+#include "icing/util/logging.h"
+#include "icing/util/tokenized-document.h"
+
+namespace icing {
+namespace lib {
+
+/* static */ libtextclassifier3::StatusOr<
+    std::unique_ptr<QualifiedIdJoinablePropertyIndexingHandler>>
+QualifiedIdJoinablePropertyIndexingHandler::Create(
+    const Clock* clock, QualifiedIdTypeJoinableIndex* qualified_id_join_index) {
+  ICING_RETURN_ERROR_IF_NULL(clock);
+  ICING_RETURN_ERROR_IF_NULL(qualified_id_join_index);
+
+  return std::unique_ptr<QualifiedIdJoinablePropertyIndexingHandler>(
+      new QualifiedIdJoinablePropertyIndexingHandler(clock,
+                                                     qualified_id_join_index));
+}
+
+libtextclassifier3::Status QualifiedIdJoinablePropertyIndexingHandler::Handle(
+    const TokenizedDocument& tokenized_document, DocumentId document_id,
+    bool recovery_mode, PutDocumentStatsProto* put_document_stats) {
+  // TODO(b/263890397): set qualified id join index processing latency and other
+  // stats.
+
+  if (qualified_id_join_index_.last_added_document_id() != kInvalidDocumentId &&
+      document_id <= qualified_id_join_index_.last_added_document_id()) {
+    if (recovery_mode) {
+      // Skip the document if document_id <= last_added_document_id in recovery
+      // mode without returning an error.
+      return libtextclassifier3::Status::OK;
+    }
+    return absl_ports::InvalidArgumentError(IcingStringUtil::StringPrintf(
+        "DocumentId %d must be greater than last added document_id %d",
+        document_id, qualified_id_join_index_.last_added_document_id()));
+  }
+  qualified_id_join_index_.set_last_added_document_id(document_id);
+
+  for (const JoinableProperty<std::string_view>& qualified_id_property :
+       tokenized_document.qualified_id_join_properties()) {
+    if (qualified_id_property.values.empty()) {
+      continue;
+    }
+
+    DocJoinInfo info(document_id, qualified_id_property.metadata.id);
+    // Currently we only support single (non-repeated) joinable value under a
+    // property.
+    std::string_view ref_qualified_id_str = qualified_id_property.values[0];
+
+    // Attempt to parse qualified id string to make sure the format is correct.
+    if (!QualifiedId::Parse(ref_qualified_id_str).ok()) {
+      // Skip incorrect format of qualified id string to save disk space.
+      continue;
+    }
+
+    libtextclassifier3::Status status =
+        qualified_id_join_index_.Put(info, ref_qualified_id_str);
+    if (!status.ok()) {
+      ICING_LOG(WARNING)
+          << "Failed to add data into qualified id join index due to: "
+          << status.error_message();
+      return status;
+    }
+  }
+
+  return libtextclassifier3::Status::OK;
+}
+
+}  // namespace lib
+}  // namespace icing