Simon Hunt | a17fa67 | 2015-08-19 18:42:22 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | * |
| 16 | */ |
| 17 | |
| 18 | package org.onosproject.ui.impl.topo; |
| 19 | |
| 20 | import com.fasterxml.jackson.databind.JsonNode; |
| 21 | import com.fasterxml.jackson.databind.node.ArrayNode; |
| 22 | import com.fasterxml.jackson.databind.node.ObjectNode; |
| 23 | import org.onosproject.net.Device; |
| 24 | import org.onosproject.net.Host; |
| 25 | import org.onosproject.net.device.DeviceService; |
| 26 | import org.onosproject.net.host.HostService; |
| 27 | import org.onosproject.ui.JsonUtils; |
| 28 | import org.slf4j.Logger; |
| 29 | import org.slf4j.LoggerFactory; |
| 30 | |
| 31 | import java.util.Collections; |
| 32 | import java.util.HashSet; |
| 33 | import java.util.Set; |
| 34 | |
| 35 | import static com.google.common.base.Strings.isNullOrEmpty; |
| 36 | import static org.onosproject.net.DeviceId.deviceId; |
| 37 | import static org.onosproject.net.HostId.hostId; |
| 38 | |
| 39 | /** |
| 40 | * Encapsulates a selection of devices and/or hosts from the topology view. |
| 41 | */ |
| 42 | public class NodeSelection { |
| 43 | |
| 44 | protected static final Logger log = |
| 45 | LoggerFactory.getLogger(NodeSelection.class); |
| 46 | |
| 47 | private static final String IDS = "ids"; |
| 48 | private static final String HOVER = "hover"; |
| 49 | |
| 50 | private final DeviceService deviceService; |
| 51 | private final HostService hostService; |
| 52 | |
| 53 | private final Set<String> ids; |
| 54 | private final String hover; |
| 55 | |
| 56 | private final Set<Device> devices = new HashSet<>(); |
| 57 | private final Set<Host> hosts = new HashSet<>(); |
| 58 | |
| 59 | /** |
| 60 | * Creates a node selection entity, from the given payload, using the |
| 61 | * supplied device and host services. |
| 62 | * |
| 63 | * @param payload message payload |
| 64 | * @param deviceService device service |
| 65 | * @param hostService host service |
| 66 | */ |
| 67 | public NodeSelection(ObjectNode payload, |
| 68 | DeviceService deviceService, |
| 69 | HostService hostService) { |
| 70 | this.deviceService = deviceService; |
| 71 | this.hostService = hostService; |
| 72 | |
| 73 | ids = extractIds(payload); |
| 74 | hover = extractHover(payload); |
| 75 | |
| 76 | Set<String> unmatched = findDevices(ids); |
| 77 | unmatched = findHosts(unmatched); |
| 78 | if (unmatched.size() > 0) { |
| 79 | log.debug("Skipping unmatched IDs {}", unmatched); |
| 80 | } |
| 81 | |
| 82 | if (!isNullOrEmpty(hover)) { |
| 83 | unmatched = new HashSet<>(); |
| 84 | unmatched.add(hover); |
| 85 | unmatched = findDevices(unmatched); |
| 86 | unmatched = findHosts(unmatched); |
| 87 | if (unmatched.size() > 0) { |
| 88 | log.debug("Skipping unmatched HOVER {}", unmatched); |
| 89 | } |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Returns a view of the selected devices. |
| 95 | * |
| 96 | * @return selected devices |
| 97 | */ |
| 98 | public Set<Device> devices() { |
| 99 | return Collections.unmodifiableSet(devices); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Returns a view of the selected hosts. |
| 104 | * |
| 105 | * @return selected hosts |
| 106 | */ |
| 107 | public Set<Host> hosts() { |
| 108 | return Collections.unmodifiableSet(hosts); |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Returns true if nothing is selected. |
| 113 | * |
| 114 | * @return true if nothing selected |
| 115 | */ |
| 116 | public boolean none() { |
| 117 | return devices().size() == 0 && hosts().size() == 0; |
| 118 | } |
| 119 | |
| 120 | @Override |
| 121 | public String toString() { |
| 122 | return "NodeSelection{" + |
| 123 | "ids=" + ids + |
| 124 | ", hover='" + hover + '\'' + |
| 125 | ", #devices=" + devices.size() + |
| 126 | ", #hosts=" + hosts.size() + |
| 127 | '}'; |
| 128 | } |
| 129 | |
| 130 | // == helper methods |
| 131 | |
| 132 | private Set<String> extractIds(ObjectNode payload) { |
| 133 | ArrayNode array = (ArrayNode) payload.path(IDS); |
| 134 | if (array == null || array.size() == 0) { |
| 135 | return Collections.emptySet(); |
| 136 | } |
| 137 | |
| 138 | Set<String> ids = new HashSet<>(); |
| 139 | for (JsonNode node : array) { |
| 140 | ids.add(node.asText()); |
| 141 | } |
| 142 | return ids; |
| 143 | } |
| 144 | |
| 145 | private String extractHover(ObjectNode payload) { |
| 146 | return JsonUtils.string(payload, HOVER); |
| 147 | } |
| 148 | |
| 149 | private Set<String> findDevices(Set<String> ids) { |
| 150 | Set<String> unmatched = new HashSet<>(); |
| 151 | Device device; |
| 152 | |
| 153 | for (String id : ids) { |
| 154 | try { |
| 155 | device = deviceService.getDevice(deviceId(id)); |
| 156 | if (device != null) { |
| 157 | devices.add(device); |
| 158 | } else { |
| 159 | log.debug("Device with ID {} not found", id); |
| 160 | } |
| 161 | } catch (IllegalArgumentException e) { |
| 162 | unmatched.add(id); |
| 163 | } |
| 164 | } |
| 165 | return unmatched; |
| 166 | } |
| 167 | |
| 168 | private Set<String> findHosts(Set<String> ids) { |
| 169 | Set<String> unmatched = new HashSet<>(); |
| 170 | Host host; |
| 171 | |
| 172 | for (String id : ids) { |
| 173 | try { |
| 174 | host = hostService.getHost(hostId(id)); |
| 175 | if (host != null) { |
| 176 | hosts.add(host); |
| 177 | } else { |
| 178 | log.debug("Host with ID {} not found", id); |
| 179 | } |
| 180 | } catch (IllegalArgumentException e) { |
| 181 | unmatched.add(id); |
| 182 | } |
| 183 | } |
| 184 | return unmatched; |
| 185 | } |
| 186 | |
| 187 | } |