maosuhan commented on code in PR #14376: URL: https://github.com/apache/flink/pull/14376#discussion_r922238897
########## flink-formats/flink-protobuf/src/main/java/org/apache/flink/formats/protobuf/util/PbCodegenUtils.java: ########## @@ -0,0 +1,270 @@ +/* + * 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.util; + +import org.apache.flink.api.common.InvalidProgramException; +import org.apache.flink.formats.protobuf.PbCodegenException; +import org.apache.flink.formats.protobuf.PbConstant; +import org.apache.flink.formats.protobuf.PbFormatContext; +import org.apache.flink.formats.protobuf.serialize.PbCodegenSerializeFactory; +import org.apache.flink.formats.protobuf.serialize.PbCodegenSerializer; +import org.apache.flink.table.types.logical.LogicalType; + +import com.google.protobuf.Descriptors.FieldDescriptor; +import org.codehaus.janino.SimpleCompiler; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** Codegen utils only used in protobuf format. */ +public class PbCodegenUtils { + private static final Logger LOG = LoggerFactory.getLogger(PbCodegenUtils.class); + + /** + * @param flinkContainerCode code phrase which represent flink container type like row/array in + * codegen sections + * @param index the index number in flink container type + * @param eleType the element type + */ + public static String flinkContainerElementCode( + String flinkContainerCode, String index, LogicalType eleType) { + switch (eleType.getTypeRoot()) { + case INTEGER: + return flinkContainerCode + ".getInt(" + index + ")"; + case BIGINT: + return flinkContainerCode + ".getLong(" + index + ")"; + case FLOAT: + return flinkContainerCode + ".getFloat(" + index + ")"; + case DOUBLE: + return flinkContainerCode + ".getDouble(" + index + ")"; + case BOOLEAN: + return flinkContainerCode + ".getBoolean(" + index + ")"; + case VARCHAR: + case CHAR: + return flinkContainerCode + ".getString(" + index + ")"; + case VARBINARY: + case BINARY: + return flinkContainerCode + ".getBinary(" + index + ")"; + case ROW: + int size = eleType.getChildren().size(); + return flinkContainerCode + ".getRow(" + index + ", " + size + ")"; + case MAP: + return flinkContainerCode + ".getMap(" + index + ")"; + case ARRAY: + return flinkContainerCode + ".getArray(" + index + ")"; + default: + throw new IllegalArgumentException("Unsupported data type in schema: " + eleType); + } + } + + /** + * Get java type str from {@link FieldDescriptor} which directly fetched from protobuf object. + * + * @return The returned code phrase will be used as java type str in codegen sections. + * @throws PbCodegenException + */ + public static String getTypeStrFromProto(FieldDescriptor fd, boolean isList, String outerPrefix) + throws PbCodegenException { + String typeStr; + switch (fd.getJavaType()) { + case MESSAGE: + if (fd.isMapField()) { + // map + FieldDescriptor keyFd = + fd.getMessageType().findFieldByName(PbConstant.PB_MAP_KEY_NAME); + FieldDescriptor valueFd = + fd.getMessageType().findFieldByName(PbConstant.PB_MAP_VALUE_NAME); + // key and value cannot be repeated + String keyTypeStr = getTypeStrFromProto(keyFd, false, outerPrefix); + String valueTypeStr = getTypeStrFromProto(valueFd, false, outerPrefix); + typeStr = "Map<" + keyTypeStr + "," + valueTypeStr + ">"; + } else { + // simple message + typeStr = PbFormatUtils.getFullJavaName(fd.getMessageType(), outerPrefix); + } + break; + case INT: + typeStr = "Integer"; + break; + case LONG: + typeStr = "Long"; + break; + case STRING: + typeStr = "String"; + break; + case ENUM: + typeStr = PbFormatUtils.getFullJavaName(fd.getEnumType(), outerPrefix); + break; + case FLOAT: + typeStr = "Float"; + break; + case DOUBLE: + typeStr = "Double"; + break; + case BYTE_STRING: + typeStr = "ByteString"; + break; + case BOOLEAN: + typeStr = "Boolean"; + break; + default: + throw new PbCodegenException("do not support field type: " + fd.getJavaType()); + } + if (isList) { + return "List<" + typeStr + ">"; + } else { + return typeStr; + } + } + + /** + * Get java type str from {@link LogicalType} which directly fetched from flink type. + * + * @return The returned code phrase will be used as java type str in codegen sections. + */ + public static String getTypeStrFromLogicType(LogicalType type) { + switch (type.getTypeRoot()) { + case INTEGER: + return "int"; + case BIGINT: + return "long"; + case FLOAT: + return "float"; + case DOUBLE: + return "double"; + case BOOLEAN: + return "boolean"; + case VARCHAR: + case CHAR: + return "StringData"; + case VARBINARY: + case BINARY: + return "byte[]"; + case ROW: + return "RowData"; + case MAP: + return "MapData"; + case ARRAY: + return "ArrayData"; + default: + throw new IllegalArgumentException("Unsupported data type in schema: " + type); + } + } + + /** + * Get protobuf default value from {@link FieldDescriptor}. + * + * @return The java code phrase which represents default value calculation. + */ + public static String pbDefaultValueCode( + FieldDescriptor fieldDescriptor, PbFormatContext pbFormatContext) + throws PbCodegenException { + String outerPrefix = pbFormatContext.getOuterPrefix(); + String nullLiteral = pbFormatContext.getPbFormatConfig().getWriteNullStringLiterals(); + switch (fieldDescriptor.getJavaType()) { + case MESSAGE: + return PbFormatUtils.getFullJavaName(fieldDescriptor.getMessageType(), outerPrefix) + + ".getDefaultInstance()"; + case INT: + return "0"; + case LONG: + return "0L"; + case STRING: + return "\"" + nullLiteral + "\""; Review Comment: in ProtobufSQLITCaseTest#testSinkWithNullLiteralWithEscape, user can write escape string in connector params. Could you take a look if this is feasible? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
