maosuhan commented on code in PR #14376: URL: https://github.com/apache/flink/pull/14376#discussion_r922237664
########## flink-formats/flink-protobuf/src/main/java/org/apache/flink/formats/protobuf/deserialize/ProtoToRowConverter.java: ########## @@ -0,0 +1,137 @@ +/* + * 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.deserialize; + +import org.apache.flink.formats.protobuf.PbCodegenException; +import org.apache.flink.formats.protobuf.PbConstant; +import org.apache.flink.formats.protobuf.PbFormatConfig; +import org.apache.flink.formats.protobuf.PbFormatContext; +import org.apache.flink.formats.protobuf.util.PbCodegenAppender; +import org.apache.flink.formats.protobuf.util.PbCodegenUtils; +import org.apache.flink.formats.protobuf.util.PbFormatUtils; +import org.apache.flink.table.data.ArrayData; +import org.apache.flink.table.data.GenericArrayData; +import org.apache.flink.table.data.GenericMapData; +import org.apache.flink.table.data.GenericRowData; +import org.apache.flink.table.data.RowData; +import org.apache.flink.table.data.binary.BinaryStringData; +import org.apache.flink.table.types.logical.RowType; + +import com.google.protobuf.ByteString; +import com.google.protobuf.Descriptors; +import com.google.protobuf.Descriptors.FileDescriptor.Syntax; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.File; +import java.lang.reflect.Method; +import java.nio.file.Files; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.UUID; + +/** + * {@link ProtoToRowConverter} can convert binary protobuf message data to flink row data by codegen + * process. + */ +public class ProtoToRowConverter { + private static final Logger LOG = LoggerFactory.getLogger(ProtoToRowConverter.class); + private final Method parseFromMethod; + private final Method decodeMethod; + + public ProtoToRowConverter(RowType rowType, PbFormatConfig formatConfig) + throws PbCodegenException { + try { + String outerPrefix = + PbFormatUtils.getOuterProtoPrefix(formatConfig.getMessageClassName()); + Descriptors.Descriptor descriptor = + PbFormatUtils.getDescriptor(formatConfig.getMessageClassName()); + Class<?> messageClass = + Class.forName( + formatConfig.getMessageClassName(), + true, + Thread.currentThread().getContextClassLoader()); + String fullMessageClassName = PbFormatUtils.getFullJavaName(descriptor, outerPrefix); + if (descriptor.getFile().getSyntax() == Syntax.PROTO3) { + // pb3 always read default values + formatConfig = + new PbFormatConfig( + formatConfig.getMessageClassName(), + formatConfig.isIgnoreParseErrors(), + true, + formatConfig.getWriteNullStringLiterals()); + } + PbCodegenAppender codegenAppender = new PbCodegenAppender(); + PbFormatContext pbFormatContext = new PbFormatContext(outerPrefix, formatConfig); + String uuid = UUID.randomUUID().toString().replaceAll("\\-", ""); + String generatedClassName = "GeneratedProtoToRow_" + uuid; + String generatedPackageName = ProtoToRowConverter.class.getPackage().getName(); + codegenAppender.appendLine("package " + generatedPackageName); + codegenAppender.appendLine("import " + RowData.class.getName()); + codegenAppender.appendLine("import " + ArrayData.class.getName()); + codegenAppender.appendLine("import " + BinaryStringData.class.getName()); + codegenAppender.appendLine("import " + GenericRowData.class.getName()); + codegenAppender.appendLine("import " + GenericMapData.class.getName()); + codegenAppender.appendLine("import " + GenericArrayData.class.getName()); + codegenAppender.appendLine("import " + ArrayList.class.getName()); + codegenAppender.appendLine("import " + List.class.getName()); + codegenAppender.appendLine("import " + Map.class.getName()); + codegenAppender.appendLine("import " + HashMap.class.getName()); + codegenAppender.appendLine("import " + ByteString.class.getName()); + + codegenAppender.appendSegment("public class " + generatedClassName + "{"); + codegenAppender.appendSegment( + "public static RowData " + + PbConstant.GENERATED_DECODE_METHOD + + "(" + + fullMessageClassName + + " message){"); + codegenAppender.appendLine("RowData rowData=null"); + PbCodegenDeserializer codegenDes = + PbCodegenDeserializeFactory.getPbCodegenTopRowDes( + descriptor, rowType, pbFormatContext); + String genCode = codegenDes.codegen("rowData", "message", 0); + codegenAppender.appendSegment(genCode); + codegenAppender.appendLine("return rowData"); + codegenAppender.appendSegment("}"); + codegenAppender.appendSegment("}"); + + String printCode = codegenAppender.printWithLineNumber(); + Files.write(new File("/tmp/printCode").toPath(), printCode.getBytes()); Review Comment: it is a mistake. 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