Program: 51977
Project: 51977
Buggy source:
@Override public void generate() throws IOException, SAXException, ProcessingException {
  Context context=null;
  try {
    context=ContextUtil.obtainContext(objectModel);
  }
 catch (  SQLException ex) {
    log.error(ex);
    throw new ProcessingException("String_Node_Str",ex);
  }
  Gson gson=new Gson();
  String jsonString=null;
  try {
    if (action.equals("String_Node_Str")) {
      if (StringUtils.isBlank(handle)) {
        resp.sendError(HttpServletResponse.SC_BAD_REQUEST);
        return;
      }
      String url=handleService.resolveToURL(context,handle);
      if (url != null) {
        jsonString=gson.toJson(new String[]{url});
      }
 else {
        jsonString=gson.toJson(null);
      }
    }
 else     if (action.equals("String_Node_Str")) {
      List<String> prefixes=new ArrayList<String>();
      prefixes.add(handleService.getPrefix());
      String additionalPrefixes=ConfigurationManager.getProperty("String_Node_Str");
      if (StringUtils.isNotBlank(additionalPrefixes)) {
        for (        String apref : additionalPrefixes.split("String_Node_Str")) {
          prefixes.add(apref.trim());
        }
      }
      jsonString=gson.toJson(prefixes);
    }
 else     if (action.equals("String_Node_Str")) {
      if (ConfigurationManager.getBooleanProperty("String_Node_Str",true)) {
        resp.sendError(HttpServletResponse.SC_NOT_FOUND);
        return;
      }
      if (StringUtils.isBlank(prefix)) {
        resp.sendError(HttpServletResponse.SC_BAD_REQUEST);
        return;
      }
      List<String> handlelist=handleService.getHandlesForPrefix(context,prefix);
      String[] handles=handlelist.toArray(new String[handlelist.size()]);
      jsonString=gson.toJson(handles);
    }
  }
 catch (  SQLException e) {
    log.error("String_Node_Str",e);
    return;
  }
  try {
    ObjectModelHelper.getResponse(objectModel).setHeader("String_Node_Str",CONTENTTYPE);
    ByteArrayInputStream inputStream=new ByteArrayInputStream(jsonString.getBytes("String_Node_Str"));
    IOUtils.copy(inputStream,out);
    out.flush();
  }
 catch (  Exception e) {
    log.error("String_Node_Str",e);
  }
}

Fixed version (ground truth):
@Override public void generate() throws IOException, SAXException, ProcessingException {
  Context context=null;
  try {
    context=ContextUtil.obtainContext(objectModel);
  }
 catch (  SQLException ex) {
    log.error(ex);
    throw new ProcessingException("String_Node_Str",ex);
  }
  Gson gson=new Gson();
  String jsonString=null;
  try {
    if (action.equals("String_Node_Str")) {
      if (StringUtils.isBlank(handle)) {
        resp.sendError(HttpServletResponse.SC_BAD_REQUEST);
        return;
      }
      String url=handleService.resolveToURL(context,handle);
      if (url != null) {
        jsonString=gson.toJson(new String[]{url});
      }
 else {
        jsonString=gson.toJson(null);
      }
    }
 else     if (action.equals("String_Node_Str")) {
      List<String> prefixes=new ArrayList<String>();
      prefixes.add(handleService.getPrefix());
      String additionalPrefixes=ConfigurationManager.getProperty("String_Node_Str");
      if (StringUtils.isNotBlank(additionalPrefixes)) {
        for (        String apref : additionalPrefixes.split("String_Node_Str")) {
          prefixes.add(apref.trim());
        }
      }
      jsonString=gson.toJson(prefixes);
    }
 else     if (action.equals("String_Node_Str")) {
      if (ConfigurationManager.getBooleanProperty("String_Node_Str",true)) {
        resp.sendError(HttpServletResponse.SC_NOT_FOUND);
        return;
      }
      if (StringUtils.isBlank(prefix)) {
        resp.sendError(HttpServletResponse.SC_BAD_REQUEST);
        return;
      }
      List<String> handlelist=handleService.getHandlesForPrefix(context,prefix);
      String[] handles=handlelist.toArray(new String[handlelist.size()]);
      jsonString=gson.toJson(handles);
    }
  }
 catch (  SQLException e) {
    log.error("String_Node_Str",e);
    return;
  }
  if (jsonString == null) {
    resp.sendError(HttpServletResponse.SC_BAD_REQUEST);
    return;
  }
  try {
    ObjectModelHelper.getResponse(objectModel).setHeader("String_Node_Str",CONTENTTYPE);
    ByteArrayInputStream inputStream=new ByteArrayInputStream(jsonString.getBytes("String_Node_Str"));
    IOUtils.copy(inputStream,out);
    out.flush();
  }
 catch (  Exception e) {
    log.error("String_Node_Str",e);
  }
}