Example usage for java.util.concurrent ConcurrentSkipListMap tailMap

Introduction

In this page you can find the example usage for java.util.concurrent ConcurrentSkipListMap tailMap.

Prototype

public ConcurrentNavigableMap<K, V> tailMap(K fromKey, boolean inclusive) 

Source Link

Usage

From source file:com.google.cloud.dns.testing.LocalDnsHelper.java

/**
 * Lists zones. Next page token is the last listed zone name and is returned only of there is more
 * to list and if the user does not exclude nextPageToken from field options.
 *//*from   w  w  w . ja  v a  2 s .c o  m*/
@VisibleForTesting
Response listZones(String projectId, String query) {
    Map<String, Object> options = OptionParsers.parseListZonesOptions(query);
    Response response = checkListOptions(options);
    if (response != null) {
        return response;
    }
    ConcurrentSkipListMap<String, ZoneContainer> containers = findProject(projectId).zones();
    String[] fields = (String[]) options.get("fields");
    String dnsName = (String) options.get("dnsName");
    String pageToken = (String) options.get("pageToken");
    Integer maxResults = options.get("maxResults") == null ? null
            : Integer.valueOf((String) options.get("maxResults"));
    boolean sizeReached = false;
    boolean hasMorePages = false;
    LinkedList<String> serializedZones = new LinkedList<>();
    String lastZoneName = null;
    ConcurrentNavigableMap<String, ZoneContainer> fragment = pageToken != null
            ? containers.tailMap(pageToken, false)
            : containers;
    for (ZoneContainer zoneContainer : fragment.values()) {
        ManagedZone zone = zoneContainer.zone();
        if (dnsName == null || zone.getDnsName().equals(dnsName)) {
            if (sizeReached) {
                // we do not add this, just note that there would be more and there should be a token
                hasMorePages = true;
                break;
            } else {
                try {
                    lastZoneName = zone.getName();
                    serializedZones.addLast(jsonFactory.toString(OptionParsers.extractFields(zone, fields)));
                } catch (IOException e) {
                    return Error.INTERNAL_ERROR.response(String.format(
                            "Error when serializing managed zone %s in project %s", lastZoneName, projectId));
                }
            }
        }
        sizeReached = maxResults != null && maxResults.equals(serializedZones.size());
    }
    boolean includePageToken = hasMorePages
            && (fields == null || Arrays.asList(fields).contains("nextPageToken"));
    return toListResponse(serializedZones, "managedZones", lastZoneName, includePageToken);
}

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