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.EOFException;
  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.generic.GenericDatumReader;
  import org.apache.avro.generic.GenericDatumWriter;
  import org.apache.avro.io.Encoder;
  import org.apache.avro.io.EncoderFactory;
  import org.apache.avro.io.DecoderFactory;
  import org.apache.avro.io.JsonDecoder;
  
  /** Tool to convert JSON data into the binary form. */
  public class JsonToBinaryFragmentTool implements Tool {
    @Override
    public int run(InputStream stdin, PrintStream out, PrintStream err, List<String> args) throws Exception {
      OptionParser optionParser = new OptionParser();
      OptionSpec<String> schemaFileOption = optionParser
          .accepts("schema-file", "File containing schema, must not occur with inline schema.").withOptionalArg()
          .ofType(String.class);
  
      OptionSet optionSet = optionParser.parse(args.toArray(new String[0]));
      List<String> nargs = (List<String>) optionSet.nonOptionArguments();
      String schemaFile = schemaFileOption.value(optionSet);
  
      if (nargs.size() != (schemaFile == null ? 2 : 1)) {
        err.println("jsontofrag --schema-file <file> [inline-schema] input-file");
        err.println("   converts JSON to Avro fragments.");
        optionParser.printHelpOn(err);
        err.println("   A dash '-' for input-file means stdin.");
        return 1;
      }
      Schema schema;
      String inputFile;
      if (schemaFile == null) {
        schema = new Schema.Parser().parse(nargs.get(0));
        inputFile = nargs.get(1);
      } else {
        schema = Util.parseSchemaFromFS(schemaFile);
        inputFile = nargs.get(0);
      }
      InputStream input = Util.fileOrStdin(inputFile, stdin);
  
      try {
        GenericDatumReader<Object> reader = new GenericDatumReader<>(schema);
  
        JsonDecoder jsonDecoder = DecoderFactory.get().jsonDecoder(schema, input);
        GenericDatumWriter<Object> writer = new GenericDatumWriter<>(schema);
        Encoder e = EncoderFactory.get().binaryEncoder(out, null);
        Object datum = null;
        while (true) {
          try {
            datum = reader.read(datum, jsonDecoder);
          } catch (EOFException eofException) {
            break;
          }
          writer.write(datum, e);
          e.flush();
        }
      } finally {
        Util.close(input);
      }
      return 0;
    }
  
    @Override
    public String getName() {
      return "jsontofrag";
    }
  
    @Override
    public String getShortDescription() {
      return "Renders a JSON-encoded Avro datum as binary.";
    }
  }
  