Program: 52053
Project: 52053
Buggy source:
/** 
 * Return all subcommunities of community.
 * @param communityId Id of community in DSpace.
 * @param expand String in which is what you want to add to returned instance of community. Options are: "all", "parentCommunity", "collections", "subCommunities" and "logo". If you want to use multiple options, it must be separated by commas.
 * @param limit Maximum communities in array. Default value is 20.
 * @param offset Index from which will start array of communities. Default value is 0.
 * @param headers If you want to access to community under logged user into context. In headers must be set header "rest-dspace-token" with passed token from login method.
 * @return Return array of subcommunities of community.
 * @throws WebApplicationException It can be caused by creating context or while was problem with reading community from database(SQLException).
 */
@GET @Path("String_Node_Str") @Produces({MediaType.APPLICATION_JSON,MediaType.APPLICATION_XML}) public Community[] getCommunityCommunities(@PathParam("String_Node_Str") Integer communityId,@QueryParam("String_Node_Str") String expand,@QueryParam("String_Node_Str") @DefaultValue("String_Node_Str") Integer limit,@QueryParam("String_Node_Str") @DefaultValue("String_Node_Str") Integer offset,@QueryParam("String_Node_Str") String user_ip,@QueryParam("String_Node_Str") String user_agent,@QueryParam("String_Node_Str") String xforwarderfor,@Context HttpHeaders headers,@Context HttpServletRequest request) throws WebApplicationException {
  log.info("String_Node_Str" + communityId + "String_Node_Str");
  org.dspace.core.Context context=null;
  ArrayList<Community> communities=null;
  try {
    context=createContext(getUser(headers));
    org.dspace.content.Community dspaceCommunity=findCommunity(context,communityId,org.dspace.core.Constants.READ);
    writeStats(dspaceCommunity,UsageEvent.Action.VIEW,user_ip,user_agent,xforwarderfor,headers,request);
    if (!((limit != null) && (limit >= 0) && (offset != null)&& (offset >= 0))) {
      log.warn("String_Node_Str");
      limit=100;
      offset=0;
    }
    communities=new ArrayList<Community>();
    org.dspace.content.Community[] dspaceCommunities=dspaceCommunity.getSubcommunities();
    for (int i=offset; (i < (offset + limit)) && (i < dspaceCommunities.length); i++) {
      if (AuthorizeManager.authorizeActionBoolean(context,dspaceCommunities[i],org.dspace.core.Constants.READ)) {
        communities.add(new Community(dspaceCommunities[i],expand,context));
        writeStats(dspaceCommunities[i],UsageEvent.Action.VIEW,user_ip,user_agent,xforwarderfor,headers,request);
      }
    }
    context.complete();
  }
 catch (  SQLException e) {
    processException("String_Node_Str" + communityId + "String_Node_Str"+ e,context);
  }
catch (  ContextException e) {
    processException("String_Node_Str" + communityId + "String_Node_Str"+ e.getMessage(),context);
  }
 finally {
    processFinally(context);
  }
  log.trace("String_Node_Str" + communityId + "String_Node_Str");
  return communities.toArray(new Community[0]);
}

Fixed version (ground truth):
/** 
 * Return all subcommunities of community.
 * @param communityId Id of community in DSpace.
 * @param expand String in which is what you want to add to returned instance of community. Options are: "all", "parentCommunity", "collections", "subCommunities" and "logo". If you want to use multiple options, it must be separated by commas.
 * @param limit Maximum communities in array. Default value is 20.
 * @param offset Index from which will start array of communities. Default value is 0.
 * @param headers If you want to access to community under logged user into context. In headers must be set header "rest-dspace-token" with passed token from login method.
 * @return Return array of subcommunities of community.
 * @throws WebApplicationException It can be caused by creating context or while was problem with reading community from database(SQLException).
 */
@GET @Path("String_Node_Str") @Produces({MediaType.APPLICATION_JSON,MediaType.APPLICATION_XML}) public Community[] getCommunityCommunities(@PathParam("String_Node_Str") Integer communityId,@QueryParam("String_Node_Str") String expand,@QueryParam("String_Node_Str") @DefaultValue("String_Node_Str") Integer limit,@QueryParam("String_Node_Str") @DefaultValue("String_Node_Str") Integer offset,@QueryParam("String_Node_Str") String user_ip,@QueryParam("String_Node_Str") String user_agent,@QueryParam("String_Node_Str") String xforwarderfor,@Context HttpHeaders headers,@Context HttpServletRequest request) throws WebApplicationException {
  log.info("String_Node_Str" + communityId + "String_Node_Str");
  org.dspace.core.Context context=null;
  ArrayList<Community> communities=null;
  try {
    context=createContext(getUser(headers));
    org.dspace.content.Community dspaceCommunity=findCommunity(context,communityId,org.dspace.core.Constants.READ);
    writeStats(dspaceCommunity,UsageEvent.Action.VIEW,user_ip,user_agent,xforwarderfor,headers,request,context);
    if (!((limit != null) && (limit >= 0) && (offset != null)&& (offset >= 0))) {
      log.warn("String_Node_Str");
      limit=100;
      offset=0;
    }
    communities=new ArrayList<Community>();
    org.dspace.content.Community[] dspaceCommunities=dspaceCommunity.getSubcommunities();
    for (int i=offset; (i < (offset + limit)) && (i < dspaceCommunities.length); i++) {
      if (AuthorizeManager.authorizeActionBoolean(context,dspaceCommunities[i],org.dspace.core.Constants.READ)) {
        communities.add(new Community(dspaceCommunities[i],expand,context));
        writeStats(dspaceCommunities[i],UsageEvent.Action.VIEW,user_ip,user_agent,xforwarderfor,headers,request,context);
      }
    }
    context.complete();
  }
 catch (  SQLException e) {
    processException("String_Node_Str" + communityId + "String_Node_Str"+ e,context);
  }
catch (  ContextException e) {
    processException("String_Node_Str" + communityId + "String_Node_Str"+ e.getMessage(),context);
  }
 finally {
    processFinally(context);
  }
  log.trace("String_Node_Str" + communityId + "String_Node_Str");
  return communities.toArray(new Community[0]);
}