diff options
Diffstat (limited to 'framework/src/onos/web/gui/src/main/java/org/onosproject/ui/impl/TopoOverlayCache.java')
-rw-r--r-- | framework/src/onos/web/gui/src/main/java/org/onosproject/ui/impl/TopoOverlayCache.java | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/framework/src/onos/web/gui/src/main/java/org/onosproject/ui/impl/TopoOverlayCache.java b/framework/src/onos/web/gui/src/main/java/org/onosproject/ui/impl/TopoOverlayCache.java deleted file mode 100644 index 99557c2d..00000000 --- a/framework/src/onos/web/gui/src/main/java/org/onosproject/ui/impl/TopoOverlayCache.java +++ /dev/null @@ -1,116 +0,0 @@ -/* - * Copyright 2015 Open Networking Laboratory - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - */ - -package org.onosproject.ui.impl; - -import org.onosproject.ui.UiTopoOverlay; - -import java.util.HashMap; -import java.util.Map; - -import static com.google.common.base.Strings.isNullOrEmpty; - -/** - * A cache of {@link org.onosproject.ui.UiTopoOverlay}'s that were registered - * at the time the UI connection was established. - */ -public class TopoOverlayCache { - - private static final String EMPTY = ""; - private static final UiTopoOverlay NONE = new NullOverlay(); - - private final Map<String, UiTopoOverlay> overlays = new HashMap<>(); - private UiTopoOverlay current = NONE; - - public TopoOverlayCache() { - overlays.put(null, NONE); - } - - /** - * Adds a topology overlay to the cache. - * - * @param overlay a topology overlay - */ - public void add(UiTopoOverlay overlay) { - overlays.put(overlay.id(), overlay); - } - - /** - * Invoked when the cache is no longer needed. - */ - public void destroy() { - overlays.clear(); - } - - /** - * Switching currently selected overlay. - * - * @param deact identity of overlay to deactivate - * @param act identity of overlay to activate - */ - public void switchOverlay(String deact, String act) { - UiTopoOverlay toDeactivate = getOverlay(deact); - UiTopoOverlay toActivate = getOverlay(act); - - toDeactivate.deactivate(); - current = toActivate; - current.activate(); - } - - private UiTopoOverlay getOverlay(String id) { - return isNullOrEmpty(id) ? NONE : overlays.get(id); - } - - /** - * Returns the current overlay instance. - * Note that this method always returns a reference; when there is no - * overlay selected the "NULL" overlay instance is returned. - * - * @return the current overlay - */ - public UiTopoOverlay currentOverlay() { - return current; - } - - /** - * Returns the number of overlays in the cache. Remember that this - * includes the "NULL" overlay, representing "no overlay selected". - * - * @return number of overlays - */ - public int size() { - return overlays.size(); - } - - /** - * Returns true if the identifier of the currently active overlay - * matches the given parameter. - * - * @param overlayId overlay identifier - * @return true if this matches the ID of currently active overlay - */ - public boolean isActive(String overlayId) { - return currentOverlay().id().equals(overlayId); - } - - // overlay instance representing "no overlay selected" - private static class NullOverlay extends UiTopoOverlay { - public NullOverlay() { - super(EMPTY); - } - } -} |