Add a set of discrete resources that can be encoded as interger
This is for ONOS-4281
Change-Id: I83de45368485a3c4f6c052b64ef82e846c0553e3
(cherry picked from commit 8a70393458fbaff16a26859d11dbc62f49f469b3)
diff --git a/core/store/dist/src/main/java/org/onosproject/store/resource/impl/EncodableDiscreteResources.java b/core/store/dist/src/main/java/org/onosproject/store/resource/impl/EncodableDiscreteResources.java
new file mode 100644
index 0000000..891f35f
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onosproject/store/resource/impl/EncodableDiscreteResources.java
@@ -0,0 +1,130 @@
+/*
+ * 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.store.resource.impl;
+
+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.DiscreteResourceSet;
+import org.onosproject.net.resource.Resources;
+
+import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+/**
+ * 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<?>, DiscreteResourceSet> values;
+
+ private static Class<?> getClass(DiscreteResource resource) {
+ return resource.valueAs(Object.class).map(Object::getClass).get();
+ }
+
+ static DiscreteResources of(Set<DiscreteResource> resources) {
+ 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<?>, DiscreteResourceSet> values = new LinkedHashMap<>();
+ for (Map.Entry<Class<?>, Set<DiscreteResource>> entry : grouped.entrySet()) {
+ DiscreteResourceCodec<?> codec = CODECS.getCodec(entry.getKey());
+ values.put(entry.getKey(), DiscreteResourceSet.of(entry.getValue(), codec));
+ }
+
+ return new EncodableDiscreteResources(parent, values);
+ }
+
+ private EncodableDiscreteResources(DiscreteResource parent, Map<Class<?>, DiscreteResourceSet> values) {
+ this.parent = parent;
+ this.values = values;
+ }
+
+ // for serializer
+ private EncodableDiscreteResources() {
+ this.parent = null;
+ this.values = null;
+ }
+
+ @Override
+ public Optional<DiscreteResource> lookup(DiscreteResourceId id) {
+ DiscreteResource resource = Resources.discrete(id).resource();
+ Class<?> cls = getClass(resource);
+ return Optional.ofNullable(values.get(cls))
+ .filter(x -> x.contains(resource))
+ .map(x -> resource);
+ }
+
+ @Override
+ public DiscreteResources difference(DiscreteResources other) {
+ Set<DiscreteResource> diff = Sets.difference(values(), other.values());
+
+ return of(parent, diff);
+ }
+
+ @Override
+ public boolean isEmpty() {
+ return !values.values().stream()
+ .flatMap(x -> x.values().stream())
+ .findAny()
+ .isPresent();
+ }
+
+ @Override
+ public boolean containsAny(List<DiscreteResource> other) {
+ return other.stream()
+ .anyMatch(x -> values().contains(x));
+ }
+
+ @Override
+ public DiscreteResources add(DiscreteResources other) {
+ Set<DiscreteResource> union = Sets.union(values(), other.values());
+
+ return of(parent, union);
+ }
+
+ @Override
+ public DiscreteResources remove(List<DiscreteResource> removed) {
+ return of(parent, Sets.difference(values(), new LinkedHashSet<>(removed)));
+ }
+
+ @Override
+ public Set<DiscreteResource> values() {
+ return values.values().stream()
+ .flatMap(x -> x.values().stream())
+ .collect(Collectors.toCollection(LinkedHashSet::new));
+ }
+
+ DiscreteResource parent() {
+ return parent;
+ }
+
+ Map<Class<?>, DiscreteResourceSet> rawValues() {
+ return values;
+ }
+}