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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 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.avro.tool;
Reads a data file to get its schema.
public class DataFileGetSchemaTool implements Tool {
  public String getName() {
    return "getschema";
  public String getShortDescription() {
    return "Prints out schema of an Avro data file.";
  public int run(InputStream stdinPrintStream outPrintStream err,
      List<Stringargsthrows Exception {
    if (args.size() != 1) {
      err.println("Expected 1 argument: input_file");
      return 1;
    DataFileReader<Voidreader =
      new DataFileReader<Void>(new File(args.get(0)),
                               new GenericDatumReader<Void>());
    return 0;
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