| /* |
| * Copyright 2016-present 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.net.optical.device; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.onosproject.net.Annotations; |
| |
| import com.google.common.annotations.Beta; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Sets; |
| |
| /** |
| * Filtered {@link Annotations} view. |
| */ |
| @Beta |
| public class FilteredAnnotation implements Annotations { |
| |
| private final Annotations delegate; |
| private final Set<String> filtered; |
| |
| /** |
| * Creates filtered {@link Annotations} view based on {@code delegate}. |
| * |
| * @param delegate input {@link Annotations} |
| * @param keys to filter-out |
| */ |
| public FilteredAnnotation(Annotations delegate, Set<String> keys) { |
| this.delegate = checkNotNull(delegate); |
| this.filtered = ImmutableSet.copyOf(keys); |
| } |
| |
| @Override |
| public String value(String key) { |
| if (filtered.contains(key)) { |
| return null; |
| } |
| return delegate.value(key); |
| } |
| |
| @Override |
| public Set<String> keys() { |
| return Sets.difference(delegate.keys(), filtered); |
| } |
| |
| @Override |
| public String toString() { |
| Map<String, String> mapView = new HashMap<>(); |
| keys().forEach(key -> mapView.put(key, delegate.value(key))); |
| return mapView.toString(); |
| } |
| } |