[GitHub] [flink] maosuhan commented on a diff in pull request #14376: [FLINK-18202][PB format] New Format of protobuf

[GitBox <gi...@apache.org>]

maosuhan commented on code in PR #14376:
URL: https://github.com/apache/flink/pull/14376#discussion_r906640797


##########
flink-formats/flink-protobuf/src/main/java/org/apache/flink/formats/protobuf/serialize/PbRowDataSerializationSchema.java:
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@@ -0,0 +1,74 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+
+package org.apache.flink.formats.protobuf.serialize;
+
+import org.apache.flink.api.common.serialization.SerializationSchema;
+import org.apache.flink.formats.protobuf.PbCodegenException;
+import org.apache.flink.formats.protobuf.PbFormatConfig;
+import org.apache.flink.formats.protobuf.PbFormatUtils;
+import org.apache.flink.formats.protobuf.PbSchemaValidator;
+import org.apache.flink.table.data.RowData;
+import org.apache.flink.table.types.logical.RowType;
+import org.apache.flink.util.FlinkRuntimeException;
+
+import com.google.protobuf.Descriptors;
+
+/**
+ * Serialization schema from Flink to Protobuf types.
+ *
+ * <p>Serializes a {@link RowData } to protobuf binary data.
+ *
+ * <p>Failures during deserialization are forwarded as wrapped {@link FlinkRuntimeException}.
+ */
+public class PbRowDataSerializationSchema implements SerializationSchema<RowData> {
+
+    private final RowType rowType;
+
+    private final PbFormatConfig pbFormatConfig;
+
+    private transient RowToProtoConverter rowToProtoConverter;
+
+    public PbRowDataSerializationSchema(RowType rowType, PbFormatConfig pbFormatConfig) {
+        this.rowType = rowType;
+        this.pbFormatConfig = pbFormatConfig;
+        Descriptors.Descriptor descriptor =
+                PbFormatUtils.getDescriptor(pbFormatConfig.getMessageClassName());
+        new PbSchemaValidator(descriptor, rowType).validate();
+        try {
+            // validate converter in client side to early detect errors
+            rowToProtoConverter = new RowToProtoConverter(rowType, pbFormatConfig);

Review Comment:
   PbSchemaValidator only validate whether the schema of both flink and protobuf macthes.
   The constructor of RowToProtoConverter will compile the generated java code and check if there's any exception.



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