rhtyd commented on a change in pull request #2293: CLOUDSTACK-10047: DVSwitch fixes and improvements URL: https://github.com/apache/cloudstack/pull/2293#discussion_r144198030
########## File path: utils/src/main/java/com/cloud/utils/UriUtils.java ########## @@ -391,4 +391,57 @@ public static InputStream getInputStreamFromUrl(String url, String user, String return null; } } + + /** + * Expands a given vlan URI to a list of vlan IDs + * @param vlanAuthority the URI part without the vlan:// scheme + * @return returns list of vlan integer ids + */ + public static List<Integer> expandVlanUri(final String vlanAuthority) { + final List<Integer> expandedVlans = new ArrayList<>(); + if (vlanAuthority == null || vlanAuthority.isEmpty()) { + return expandedVlans; + } + for (final String vlanPart: vlanAuthority.split(",")) { + if (vlanPart == null || vlanPart.isEmpty()) { + continue; + } + final String[] range = vlanPart.split("-"); + if (range.length == 2) { + Integer start = NumbersUtil.parseInt(range[0], -1); + Integer end = NumbersUtil.parseInt(range[1], -1); + if (start <= end && end > -1 && start > -1) { + while (start <= end) { + expandedVlans.add(start++); + } + } + } else { + final Integer value = NumbersUtil.parseInt(range[0], -1); + if (value > -1) { + expandedVlans.add(value); + } + } + } + return expandedVlans; + } + + /** + * Checks if given vlan URI authorities overlap + * @param vlanRange1 + * @param vlanRange2 + * @return true if they overlap + */ + public static boolean checkVlanUriOverlap(final String vlanRange1, final String vlanRange2) { + final List<Integer> vlans1 = expandVlanUri(vlanRange1); + final List<Integer> vlans2 = expandVlanUri(vlanRange2); + if (vlans1 == null || vlans2 == null) { Review comment: We're checking if two vlan ranges (comma separated ranges or values, such as `100-200,300` or `20-30` etc) overlap, if any of them when expanded (i.e. `1-3` expands to `1,2,3`) is null, i.e. there is no overlap. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services