1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 import org.apache.commons.javaflow.bytecode.transformation.ResourceTransformer;
18 import org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer;
19 import org.apache.commons.javaflow.bytecode.transformation.bcel.BcelClassTransformer;
20 import org.apache.commons.javaflow.utils.RewritingUtils;
21
22 import java.io.IOException;
23
24 /**
25 * A small test utility for performing a transformation on a single class file.
26 *
27 * <p>
28 * Reads a class file image from stdin, write to stdout.
29 *
30 * @author Kohsuke Kawaguchi
31 */
32 public class RewriteTool {
33 public static void main(String[] args) throws IOException {
34 ResourceTransformer trans = new BcelClassTransformer();
35 if(args.length>0 && args[0].equals("asm"))
36 trans = new AsmClassTransformer();
37
38 byte[] out = trans.transform(RewritingUtils.toByteArray(System.in));
39 System.out.write(out);
40 }
41 }