| /* |
| * Copyright 2016-present Open Networking Foundation |
| * |
| * 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.store.resource.impl; |
| |
| import com.google.common.base.MoreObjects; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Sets; |
| import org.onosproject.net.resource.DiscreteResource; |
| import org.onosproject.net.resource.DiscreteResourceCodec; |
| import org.onosproject.net.resource.DiscreteResourceId; |
| import org.onosproject.net.resource.Resources; |
| |
| import java.util.LinkedHashMap; |
| import java.util.LinkedHashSet; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.Objects; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| |
| /** |
| * A set of discrete resources that can be encoded as integers. |
| */ |
| final class EncodableDiscreteResources implements DiscreteResources { |
| private static final Codecs CODECS = Codecs.getInstance(); |
| private final DiscreteResource parent; |
| private final Map<Class<?>, EncodedDiscreteResources> map; |
| |
| private static Class<?> getClass(DiscreteResource resource) { |
| return resource.valueAs(Object.class).map(Object::getClass).get(); |
| } |
| |
| static DiscreteResources of(Set<DiscreteResource> resources) { |
| if (resources.isEmpty()) { |
| return DiscreteResources.empty(); |
| } |
| |
| DiscreteResource parent = resources.iterator().next().parent().get(); |
| return of(parent, resources); |
| } |
| |
| static EncodableDiscreteResources of(DiscreteResource parent, Set<DiscreteResource> resources) { |
| Map<Class<?>, Set<DiscreteResource>> grouped = resources.stream() |
| .collect(Collectors.groupingBy(x -> getClass(x), Collectors.toCollection(LinkedHashSet::new))); |
| |
| Map<Class<?>, EncodedDiscreteResources> values = new LinkedHashMap<>(); |
| for (Map.Entry<Class<?>, Set<DiscreteResource>> entry : grouped.entrySet()) { |
| DiscreteResourceCodec<?> codec = CODECS.getCodec(entry.getKey()); |
| values.put(entry.getKey(), EncodedDiscreteResources.of(entry.getValue(), codec)); |
| } |
| |
| return new EncodableDiscreteResources(parent, values); |
| } |
| |
| private static DiscreteResources of(DiscreteResource parent, Map<Class<?>, EncodedDiscreteResources> map) { |
| if (isEmpty(map)) { |
| return DiscreteResources.empty(); |
| } |
| return new EncodableDiscreteResources(parent, map); |
| } |
| |
| private static boolean isEmpty(Map<Class<?>, EncodedDiscreteResources> map) { |
| return map.values().stream().allMatch(EncodedDiscreteResources::isEmpty); |
| } |
| |
| EncodableDiscreteResources(DiscreteResource parent, Map<Class<?>, EncodedDiscreteResources> map) { |
| this.parent = parent; |
| this.map = map; |
| } |
| |
| @Override |
| public Optional<DiscreteResource> lookup(DiscreteResourceId id) { |
| if (!id.parent().filter(parent.id()::equals).isPresent()) { |
| return Optional.empty(); |
| } |
| DiscreteResource resource = Resources.discrete(id).resource(); |
| Class<?> cls = getClass(resource); |
| return Optional.ofNullable(map.get(cls)) |
| .filter(x -> x.contains(resource)) |
| .map(x -> resource); |
| } |
| |
| @Override |
| public DiscreteResources difference(DiscreteResources other) { |
| if (other instanceof EncodableDiscreteResources) { |
| EncodableDiscreteResources cast = (EncodableDiscreteResources) other; |
| |
| Map<Class<?>, EncodedDiscreteResources> newMap = new LinkedHashMap<>(); |
| for (Entry<Class<?>, EncodedDiscreteResources> e : this.map.entrySet()) { |
| Class<?> key = e.getKey(); |
| EncodedDiscreteResources thisValues = e.getValue(); |
| EncodedDiscreteResources otherValues = cast.map.get(key); |
| if (otherValues == null) { |
| newMap.put(key, thisValues); |
| continue; |
| } |
| EncodedDiscreteResources diff = thisValues.difference(otherValues); |
| // omit empty resources from a new resource set |
| // empty EncodedDiscreteResources can't deserialize due to |
| // inability to reproduce a Class<?> instance from the serialized data |
| if (diff.isEmpty()) { |
| continue; |
| } |
| newMap.put(key, diff); |
| } |
| |
| return of(parent, newMap); |
| } else if (other instanceof EmptyDiscreteResources) { |
| return this; |
| } |
| |
| return DiscreteResources.of(Sets.difference(values(), other.values())); |
| } |
| |
| @Override |
| public boolean isEmpty() { |
| return isEmpty(map); |
| } |
| |
| @Override |
| public boolean containsAny(Set<DiscreteResource> other) { |
| return other.stream() |
| .filter(x -> map.containsKey(getClass(x))) |
| .anyMatch(x -> map.get(getClass(x)).contains(x)); |
| } |
| |
| @Override |
| public DiscreteResources add(DiscreteResources other) { |
| if (other instanceof EncodableDiscreteResources) { |
| EncodableDiscreteResources cast = (EncodableDiscreteResources) other; |
| LinkedHashMap<Class<?>, EncodedDiscreteResources> newMap = |
| Stream.concat(this.map.entrySet().stream(), cast.map.entrySet().stream()) |
| .collect(Collectors.toMap( |
| Map.Entry::getKey, |
| Map.Entry::getValue, |
| EncodedDiscreteResources::add, |
| LinkedHashMap::new |
| )); |
| return of(parent, newMap); |
| } else if (other instanceof EmptyDiscreteResources) { |
| return this; |
| } |
| |
| return DiscreteResources.of(Sets.union(this.values(), other.values())); |
| } |
| |
| @Override |
| public Set<DiscreteResource> values() { |
| return map.values().stream() |
| .flatMap(x -> x.values(parent.id()).stream()) |
| .collect(Collectors.toCollection(LinkedHashSet::new)); |
| } |
| |
| @Override |
| public <T> Set<DiscreteResource> valuesOf(Class<T> cls) { |
| return Optional.ofNullable(map.get(cls)) |
| .map(x -> x.values(parent.id())) |
| .orElse(ImmutableSet.of()); |
| } |
| |
| DiscreteResource parent() { |
| return parent; |
| } |
| |
| Map<Class<?>, EncodedDiscreteResources> rawValues() { |
| return map; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(parent, map); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null || getClass() != obj.getClass()) { |
| return false; |
| } |
| final EncodableDiscreteResources other = (EncodableDiscreteResources) obj; |
| return Objects.equals(this.parent, other.parent) |
| && Objects.equals(this.map, other.map); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(this) |
| .add("values", values()) |
| .toString(); |
| } |
| } |