| /* |
| * 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 org.apache.avro.Protocol; |
| import org.apache.avro.Schema; |
| import org.apache.avro.compiler.idl.Idl; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.FileOutputStream; |
| import java.io.InputStream; |
| import java.io.PrintStream; |
| import java.util.List; |
| |
| /** |
| * Extract the Avro JSON schemata of the types of a protocol defined through an |
| * idl format file. |
| */ |
| public class IdlToSchemataTool implements Tool { |
| @Override |
| public int run(InputStream in, PrintStream out, PrintStream err, List<String> args) throws Exception { |
| if (args.isEmpty() || args.size() > 2 || isRequestingHelp(args)) { |
| err.println("Usage: idl2schemata [idl] [outdir]"); |
| err.println(""); |
| err.println("If an output directory is not specified, " + "outputs to current directory."); |
| return -1; |
| } |
| |
| boolean pretty = true; |
| Idl parser = new Idl(new File(args.get(0))); |
| File outputDirectory = getOutputDirectory(args); |
| |
| final Protocol protocol = parser.CompilationUnit(); |
| final List<String> warnings = parser.getWarningsAfterParsing(); |
| for (String warning : warnings) { |
| err.println("Warning: " + warning); |
| } |
| for (Schema schema : protocol.getTypes()) { |
| print(schema, outputDirectory, pretty); |
| } |
| parser.close(); |
| |
| return 0; |
| } |
| |
| private boolean isRequestingHelp(List<String> args) { |
| return args.size() == 1 && (args.get(0).equals("--help") || args.get(0).equals("-help")); |
| } |
| |
| private File getOutputDirectory(List<String> args) { |
| String dirname = (args.size() == 2) ? args.get(1) : ""; |
| File outputDirectory = new File(dirname); |
| outputDirectory.mkdirs(); |
| return outputDirectory; |
| } |
| |
| private void print(Schema schema, File outputDirectory, boolean pretty) throws FileNotFoundException { |
| String dirpath = outputDirectory.getAbsolutePath(); |
| String filename = dirpath + "/" + schema.getName() + ".avsc"; |
| FileOutputStream fileOutputStream = new FileOutputStream(filename); |
| PrintStream printStream = new PrintStream(fileOutputStream); |
| printStream.println(schema.toString(pretty)); |
| printStream.close(); |
| } |
| |
| @Override |
| public String getName() { |
| return "idl2schemata"; |
| } |
| |
| @Override |
| public String getShortDescription() { |
| return "Extract JSON schemata of the types from an Avro IDL file"; |
| } |
| } |