content: /*
   * Copyright (C) 2017 The Android Open Source Project
   *
   * Licensed 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 lockedregioncodeinjection;
  
  import java.io.BufferedInputStream;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.util.Collections;
  import java.util.Enumeration;
  import java.util.List;
  import java.util.zip.ZipEntry;
  import java.util.zip.ZipFile;
  import java.util.zip.ZipOutputStream;
  import org.objectweb.asm.ClassReader;
  import org.objectweb.asm.ClassWriter;
  
  public class Main {
      public static void main(String[] args) throws IOException {
          String inJar = null;
          String outJar = null;
  
          String legacyTargets = null;
          String legacyPreMethods = null;
          String legacyPostMethods = null;
          for (int i = 0; i < args.length; i++) {
              if ("-i".equals(args[i].trim())) {
                  i++;
                  inJar = args[i].trim();
              } else if ("-o".equals(args[i].trim())) {
                  i++;
                  outJar = args[i].trim();
              } else if ("--targets".equals(args[i].trim())) {
                  i++;
                  legacyTargets = args[i].trim();
              } else if ("--pre".equals(args[i].trim())) {
                  i++;
                  legacyPreMethods = args[i].trim();
              } else if ("--post".equals(args[i].trim())) {
                  i++;
                  legacyPostMethods = args[i].trim();
              }
  
          }
  
          // TODO(acleung): Better help message than asserts.
          assert inJar != null;
          assert outJar != null;
          assert legacyTargets == null || (legacyPreMethods != null && legacyPostMethods != null);
  
          ZipFile zipSrc = new ZipFile(inJar);
          ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(outJar));
          List<LockTarget> targets = null;
          if (legacyTargets != null) {
              targets = Utils.getTargetsFromLegacyJackConfig(legacyTargets, legacyPreMethods,
                      legacyPostMethods);
          } else {
              targets = Collections.emptyList();
          }
  
          Enumeration<? extends ZipEntry> srcEntries = zipSrc.entries();
          while (srcEntries.hasMoreElements()) {
              ZipEntry entry = srcEntries.nextElement();
              ZipEntry newEntry = new ZipEntry(entry.getName());
              zos.putNextEntry(newEntry);
              BufferedInputStream bis = new BufferedInputStream(zipSrc.getInputStream(entry));
  
              if (entry.getName().endsWith(".class")) {
                  convert(bis, zos, targets);
              } else {
                  while (bis.available() > 0) {
                      zos.write(bis.read());
                  }
                  zos.closeEntry();
                  bis.close();
              }
          }
          zos.finish();
          zos.close();
          zipSrc.close();
      }
  
      private static void convert(InputStream in, OutputStream out, List<LockTarget> targets)
              throws IOException {
          ClassReader cr = new ClassReader(in);
          ClassWriter cw = new ClassWriter(0);
          LockFindingClassVisitor cv = new LockFindingClassVisitor(targets, cw);
          cr.accept(cv, 0);
          byte[] data = cw.toByteArray();
          out.write(data);
      }
  }
  