| /* |
| * 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.BufferedInputStream; |
| import java.io.BufferedOutputStream; |
| import java.io.InputStream; |
| import java.io.PrintStream; |
| import java.nio.Buffer; |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| |
| import joptsimple.OptionParser; |
| import joptsimple.OptionSet; |
| import joptsimple.OptionSpec; |
| |
| import org.apache.avro.Schema; |
| import org.apache.avro.file.CodecFactory; |
| import org.apache.avro.file.DataFileWriter; |
| import org.apache.avro.generic.GenericDatumWriter; |
| |
| /** |
| * Reads a text file into an Avro data file. |
| * |
| * Can accept a file name, and HDFS file URI, or stdin. Can write to a file |
| * name, an HDFS URI, or stdout. |
| */ |
| public class FromTextTool implements Tool { |
| private static final String TEXT_FILE_SCHEMA = "\"bytes\""; |
| |
| @Override |
| public String getName() { |
| return "fromtext"; |
| } |
| |
| @Override |
| public String getShortDescription() { |
| return "Imports a text file into an avro data file."; |
| } |
| |
| @Override |
| public int run(InputStream stdin, PrintStream out, PrintStream err, List<String> args) throws Exception { |
| |
| OptionParser p = new OptionParser(); |
| OptionSpec<Integer> level = Util.compressionLevelOption(p); |
| OptionSpec<String> codec = Util.compressionCodecOption(p); |
| |
| OptionSet opts = p.parse(args.toArray(new String[0])); |
| |
| List<String> nargs = (List<String>) opts.nonOptionArguments(); |
| if (nargs.size() != 2) { |
| err.println("Expected 2 args: from_file to_file (local filenames," + " Hadoop URI's, or '-' for stdin/stdout"); |
| p.printHelpOn(err); |
| return 1; |
| } |
| |
| CodecFactory codecFactory = Util.codecFactory(opts, codec, level); |
| |
| BufferedInputStream inStream = Util.fileOrStdin(nargs.get(0), stdin); |
| BufferedOutputStream outStream = Util.fileOrStdout(nargs.get(1), out); |
| |
| DataFileWriter<ByteBuffer> writer = new DataFileWriter<>(new GenericDatumWriter<>()); |
| writer.setCodec(codecFactory); |
| writer.create(new Schema.Parser().parse(TEXT_FILE_SCHEMA), outStream); |
| |
| ByteBuffer line = ByteBuffer.allocate(128); |
| boolean returnSeen = false; |
| byte[] buf = new byte[8192]; |
| for (int end = inStream.read(buf); end != -1; end = inStream.read(buf)) { |
| for (int i = 0; i < end; i++) { |
| int b = buf[i] & 0xFF; |
| if (b == '\n') { // newline |
| if (!returnSeen) { |
| System.out.println("Writing line = " + line.position()); |
| ((Buffer) line).flip(); |
| writer.append(line); |
| ((Buffer) line).clear(); |
| } else { |
| returnSeen = false; |
| } |
| } else if (b == '\r') { // return |
| ((Buffer) line).flip(); |
| writer.append(line); |
| ((Buffer) line).clear(); |
| returnSeen = true; |
| } else { |
| if (line.position() == line.limit()) { // reallocate longer line |
| ByteBuffer tempLine = ByteBuffer.allocate(line.limit() * 2); |
| ((Buffer) line).flip(); |
| tempLine.put(line); |
| line = tempLine; |
| } |
| line.put((byte) b); |
| returnSeen = false; |
| } |
| } |
| } |
| writer.close(); |
| inStream.close(); |
| return 0; |
| } |
| |
| } |