/**
* 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.avro.tool;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.util.List;
import org.apache.avro.file.DataFileStream;
import org.apache.avro.generic.GenericDatumReader;
import org.apache.trevni.ColumnFileMetaData;
import org.apache.trevni.avro.AvroColumnWriter;
import joptsimple.OptionParser;
import joptsimple.OptionSet;
import joptsimple.OptionSpec;
/** Reads an Avro data file and writes a Trevni file. */
public class ToTrevniTool implements Tool {
@Override
public String getName() {
return "totrevni";
}
@Override
public String getShortDescription() {
return "Converts an Avro data file to a Trevni file.";
}
@Override
public int run(InputStream stdin, PrintStream out, PrintStream err,
List<String> args) throws Exception {
OptionParser p = new OptionParser();
OptionSpec<String> codec =
p.accepts("codec", "Compression codec")
.withRequiredArg()
.defaultsTo("null")
.ofType(String.class);
OptionSet opts = p.parse(args.toArray(new String[0]));
if (opts.nonOptionArguments().size() != 2) {
err.println("Usage: inFile outFile (filenames or '-' for stdin/stdout)");
p.printHelpOn(err);
return 1;
}
args = (List<String>)opts.nonOptionArguments();
DataFileStream<Object> reader =
new DataFileStream(Util.fileOrStdin(args.get(0), stdin),
new GenericDatumReader<Object>());
OutputStream outs = Util.fileOrStdout(args.get(1), out);
AvroColumnWriter<Object> writer =
new AvroColumnWriter<Object>(reader.getSchema(),
new ColumnFileMetaData()
.setCodec(codec.value(opts)));
for (Object datum : reader)
writer.write(datum);
writer.writeTo(outs);
outs.close();
reader.close();
return 0;
}
}