Add proto definition for simulator synthetic data specification

src/main/proto/wfa/measurement/api/v2alpha/event_group_metadata/testing/BUILD.bazel

@@ -11,7 +11,10 @@ IMPORT_PREFIX = "/src/main/proto"
 
 proto_library(
     name = "test_metadata_messages_proto",
-    srcs = glob(["*.proto"]),
+    srcs = [
+        "test_metadata_message.proto",
+        "test_metadata_message_2.proto",
+    ],
     strip_import_prefix = IMPORT_PREFIX,
     deps = [
         "@com_google_protobuf//:descriptor_proto",
@@ -30,3 +33,24 @@ kt_jvm_proto_library(
     srcs = [":test_metadata_messages_proto"],
     deps = [":test_metadata_messages_java_proto"],
 )
+
+proto_library(
+    name = "simulator_synthetic_data_spec_proto",
+    srcs = ["simulator_synthetic_data_spec.proto"],
+    strip_import_prefix = IMPORT_PREFIX,
+    deps = [
+        "@com_google_googleapis//google/type:date_proto",
+        "@com_google_protobuf//:descriptor_proto",
+    ],
+)
+
+java_proto_library(
+    name = "simulator_synthetic_data_spec_java_proto",
+    deps = [":simulator_synthetic_data_spec_proto"],
+)
+
+kt_jvm_proto_library(
+    name = "simulator_synthetic_data_spec_kt_jvm_proto",
+    srcs = [":simulator_synthetic_data_spec_proto"],
+    deps = [":simulator_synthetic_data_spec_java_proto"],
+)

src/main/proto/wfa/measurement/api/v2alpha/event_group_metadata/testing/simulator_synthetic_data_spec.proto

@@ -0,0 +1,92 @@
+// Copyright 2023 The Cross-Media Measurement Authors
+//
+// 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.
+
+syntax = "proto3";
+
+package wfa.measurement.api.v2alpha.event_group_metadata.testing;
+
+import "google/protobuf/descriptor.proto";
+import "google/type/date.proto";
+
+option java_package = "org.wfanet.measurement.api.v2alpha.event_group_metadata.testing";
+option java_multiple_files = true;
+
+message SimulatorSyntheticDataSpec {
+  repeated SyntheticEventGroupSpec event_group_spec = 1;
+  SyntheticPopulationSpec population = 2;
+}
+
+// A sequence of VIDs represented with an inclusive beginning and end.
+message VidInterval {
+  int64 begin = 1;
+  int64 end = 2;
+}
+
+// The specification of the entire VID space.
+message SyntheticPopulationSpec {
+  VidInterval vid_interval = 1;
+
+  // For Age, Gender, Social Grade ...
+  // These need to be assigned at the VID level here. When generating a
+  // SimulatorSyntheticData you need to import the necessary EventTemplate.
+  repeated google.protobuf.FieldDescriptorProto population_fields = 2;
+
+  // For Device, Location, Duration ...
+  // These need to be assigned at the impression level in the FrequencySpec.
+  repeated google.protobuf.FieldDescriptorProto non_population_fields = 3;
+
+  message SubPopulation {
+    VidInterval vid_sub_interval = 1;
+
+    // A list of the same length as the population field descriptors whose
+    // values are one of each of the values for the field descriptor
+    // (e.g. if the first field descriptor is age bucket, then the first
+    // value in this list is a particular age bucket). This list should be
+    // unique across subpopulations.
+    repeated string population_fields_values = 2;
+  }
+  repeated SubPopulation sub_populations = 4;
+}
+
+
+// Each Synthetic event group spec indicates which VID intervals are reached.
+message SyntheticEventGroupSpec {
+  string property_under_measurement = 1;
+  string description = 2;
+
+  // The VIDs reached with their frequency non-population attributes.
+  message FrequencySpec {
+    int64 frequency = 1;
+    // The VID intervals should be sub-intervals of SubPopulations.
+    message VidIntervalSpec {
+      VidInterval vid_intervals = 1;
+
+      // A list of the same length as the non-population field descriptors
+      // whose values are one of each of the values for the field
+      // descriptor (e.g. if the first field descriptor is device bucket,
+      // then the first value in this list is a particular device).
+      repeated string non_population_field_values = 2;
+    }
+    repeated VidIntervalSpec vid_interval_specs = 2;
+  }
+
+  message DateSpec {
+    // Date the VIDs were reached.
+    google.type.Date date = 1;
+    // Each FrequencySpec must have a unique frequency.
+    repeated FrequencySpec frequency_specs = 2;
+  }
+
+  repeated DateSpec date_specs = 3;
+}