nizhikov commented on code in PR #14471: URL: https://github.com/apache/kafka/pull/14471#discussion_r1530815007
########## tools/src/main/java/org/apache/kafka/tools/consumer/group/CsvUtils.java: ########## @@ -0,0 +1,151 @@ +/* + * 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.kafka.tools.consumer.group; + +import com.fasterxml.jackson.annotation.JsonProperty; +import com.fasterxml.jackson.databind.ObjectReader; +import com.fasterxml.jackson.databind.ObjectWriter; +import com.fasterxml.jackson.dataformat.csv.CsvMapper; +import com.fasterxml.jackson.dataformat.csv.CsvSchema; + +public class CsvUtils { + private final static CsvMapper MAPPER = new CsvMapper(); + + static ObjectReader readerFor(Class<?> clazz) { + return MAPPER.readerFor(clazz).with(getSchema(clazz)); + } + + static ObjectWriter writerFor(Class<?> clazz) { + return MAPPER.writerFor(clazz).with(getSchema(clazz)); + } + + private static CsvSchema getSchema(Class<?> clazz) { + String[] fields; + if (CsvRecordWithGroup.class == clazz) + fields = CsvRecordWithGroup.FIELDS; + else if (CsvRecordNoGroup.class == clazz) + fields = CsvRecordNoGroup.FIELDS; + else + throw new IllegalStateException("Unhandled class " + clazz); + + return MAPPER.schemaFor(clazz).sortedBy(fields); + } + + public static class CsvRecordWithGroup { + public static final String[] FIELDS = new String[] {"group", "topic", "partition", "offset"}; + + @JsonProperty + private String group; + + @JsonProperty + private String topic; + + @JsonProperty + private int partition; + + @JsonProperty + private long offset; + + public CsvRecordWithGroup() { + } + + public CsvRecordWithGroup(String group, String topic, int partition, long offset) { + this.group = group; + this.topic = topic; + this.partition = partition; + this.offset = offset; + } + + public void setGroup(String group) { + this.group = group; + } + + public String getGroup() { + return group; + } + + public String getTopic() { + return topic; + } + + public void setTopic(String topic) { + this.topic = topic; + } + + public int getPartition() { + return partition; + } + + public void setPartition(int partition) { + this.partition = partition; + } + + public long getOffset() { + return offset; + } + + public void setOffset(long offset) { + this.offset = offset; + } + } + + public static class CsvRecordNoGroup { + public static final String[] FIELDS = new String[]{"topic", "partition", "offset"}; + + @JsonProperty + private String topic; + + @JsonProperty + private int partition; + + @JsonProperty + private long offset; + + public CsvRecordNoGroup() { Review Comment: Done ########## tools/src/main/java/org/apache/kafka/tools/consumer/group/CsvUtils.java: ########## @@ -0,0 +1,151 @@ +/* + * 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.kafka.tools.consumer.group; + +import com.fasterxml.jackson.annotation.JsonProperty; +import com.fasterxml.jackson.databind.ObjectReader; +import com.fasterxml.jackson.databind.ObjectWriter; +import com.fasterxml.jackson.dataformat.csv.CsvMapper; +import com.fasterxml.jackson.dataformat.csv.CsvSchema; + +public class CsvUtils { + private final static CsvMapper MAPPER = new CsvMapper(); + + static ObjectReader readerFor(Class<?> clazz) { + return MAPPER.readerFor(clazz).with(getSchema(clazz)); + } + + static ObjectWriter writerFor(Class<?> clazz) { + return MAPPER.writerFor(clazz).with(getSchema(clazz)); + } + + private static CsvSchema getSchema(Class<?> clazz) { + String[] fields; + if (CsvRecordWithGroup.class == clazz) + fields = CsvRecordWithGroup.FIELDS; + else if (CsvRecordNoGroup.class == clazz) + fields = CsvRecordNoGroup.FIELDS; + else + throw new IllegalStateException("Unhandled class " + clazz); + + return MAPPER.schemaFor(clazz).sortedBy(fields); + } + + public static class CsvRecordWithGroup { + public static final String[] FIELDS = new String[] {"group", "topic", "partition", "offset"}; + + @JsonProperty + private String group; + + @JsonProperty + private String topic; + + @JsonProperty + private int partition; + + @JsonProperty + private long offset; + + public CsvRecordWithGroup() { Review Comment: Done -- This is an automated message from the Apache Git Service. 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