content: /*
   * 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
   *
   *     https://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.avro.tool;
  
  import java.io.InputStream;
  import java.io.PrintStream;
  import java.util.List;
  
  import joptsimple.OptionParser;
  import joptsimple.OptionSet;
  import joptsimple.OptionSpec;
  
  import org.apache.avro.Schema;
  import org.apache.avro.file.DataFileWriter;
  import org.apache.avro.generic.GenericDatumWriter;
  import org.apache.avro.util.RandomData;
  
  /** Creates a file filled with randomly-generated instances of a schema. */
  public class CreateRandomFileTool implements Tool {
  
    @Override
    public String getName() {
      return "random";
    }
  
    @Override
    public String getShortDescription() {
      return "Creates a file with randomly generated instances of a schema.";
    }
  
    @SuppressWarnings("unchecked")
    @Override
    public int run(InputStream stdin, PrintStream out, PrintStream err, List<String> args) throws Exception {
  
      OptionParser p = new OptionParser();
      OptionSpec<Integer> count = p.accepts("count", "Record Count").withRequiredArg().ofType(Integer.class);
      OptionSpec<String> codec = Util.compressionCodecOption(p);
      OptionSpec<Integer> level = Util.compressionLevelOption(p);
      OptionSpec<String> file = p.accepts("schema-file", "Schema File").withOptionalArg().ofType(String.class);
      OptionSpec<String> inschema = p.accepts("schema", "Schema").withOptionalArg().ofType(String.class);
      OptionSpec<Long> seedOpt = p.accepts("seed", "Seed for random").withOptionalArg().ofType(Long.class);
  
      OptionSet opts = p.parse(args.toArray(new String[0]));
      if (opts.nonOptionArguments().size() != 1) {
        err.println("Usage: outFile (filename or '-' for stdout)");
        p.printHelpOn(err);
        return 1;
      }
      args = (List<String>) opts.nonOptionArguments();
  
      String schemastr = inschema.value(opts);
      String schemafile = file.value(opts);
      Long seed = seedOpt.value(opts);
      if (schemastr == null && schemafile == null) {
        err.println("Need input schema (--schema-file) or (--schema)");
        p.printHelpOn(err);
        return 1;
      }
      Schema schema = (schemafile != null) ? Util.parseSchemaFromFS(schemafile) : new Schema.Parser().parse(schemastr);
  
      DataFileWriter<Object> writer = new DataFileWriter<>(new GenericDatumWriter<>());
      writer.setCodec(Util.codecFactory(opts, codec, level));
      writer.create(schema, Util.fileOrStdout(args.get(0), out));
  
      Integer countValue = count.value(opts);
      if (countValue == null) {
        err.println("Need count (--count)");
        p.printHelpOn(err);
        writer.close();
        return 1;
      }
  
      RandomData rd = seed == null ? new RandomData(schema, countValue) : new RandomData(schema, countValue, seed);
      for (Object datum : rd)
        writer.append(datum);
  
      writer.close();
  
      return 0;
    }
  
  }
  