protected final String getCommonSuperClass()

in proxy/proxy-impl/src/main/java/org/apache/aries/proxy/impl/common/OSGiFriendlyClassWriter.java [61:126]
62 lines of code
17 McCabe index (conditional complexity)

  protected final String getCommonSuperClass(String arg0, String arg1) {
    //If either is Object, then Object must be the answer
    if(arg0.equals(OBJECT_INTERNAL_NAME) || arg1.equals(OBJECT_INTERNAL_NAME)) {
      return OBJECT_INTERNAL_NAME;
    }
    Set<String> names = new HashSet<String>();
    names.add(arg0);
    names.add(arg1);
    //Try loading the class (in ASM not for real)
    try {
      boolean bRunning = true;
      boolean aRunning = true;
      InputStream is;
      String arg00 = arg0;
      String arg11 = arg1;
      String unable = null;
      while(aRunning || bRunning ) {
        if(aRunning) {
          is = loader.getResourceAsStream(arg00 + ".class");
          if(is != null) {
            ClassReader cr = new ClassReader(is);
            arg00 = cr.getSuperName();
            if(arg00 == null) {
              if (names.size() == 2) {
                return OBJECT_INTERNAL_NAME; //arg0 is an interface
              }
              aRunning = false; //old arg00 was java.lang.Object
            } else if(!names.add(arg00)) {
              return arg00;
            }
          } else {
            //The class file isn't visible on this ClassLoader
            unable = arg0;
            aRunning = false;
          }
        }
        if(bRunning) {
          is = loader.getResourceAsStream(arg11 + ".class");
          if(is != null) {
            ClassReader cr = new ClassReader(is);
            arg11 = cr.getSuperName();
            if(arg11 == null) {
              if (names.size() == 3) {
                return OBJECT_INTERNAL_NAME;  //arg1 is an interface
              }
              bRunning = false; //old arg11 was java.lang.Object
            } else if(!names.add(arg11)) {
              return arg11;
            }
          } else {
            unable = arg1;
            bRunning = false;
          }
        }
      }

      String msg = String.format("The class %s and %s do not have a common super class.", arg0, arg1);
      if (unable == null) {
          throw new RuntimeException(msg);
      } else {
          throw new RuntimeException(new UnableToProxyException(unable, msg));
      }
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }