Introduce abstract interface for set of discrete resources
Change-Id: Iddbed1a2dd0c6ce3d7288371a47a7b0aeba46803
diff --git a/core/store/dist/src/main/java/org/onosproject/store/resource/impl/NonEncodableDiscreteResources.java b/core/store/dist/src/main/java/org/onosproject/store/resource/impl/NonEncodableDiscreteResources.java
new file mode 100644
index 0000000..c285ae5
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onosproject/store/resource/impl/NonEncodableDiscreteResources.java
@@ -0,0 +1,120 @@
+/*
+ * 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.base.MoreObjects;
+import com.google.common.collect.Sets;
+import org.onosproject.net.resource.DiscreteResource;
+import org.onosproject.net.resource.DiscreteResourceId;
+import org.onosproject.net.resource.Resources;
+
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+
+final class NonEncodableDiscreteResources implements DiscreteResources {
+ private final Set<DiscreteResource> values;
+
+ static NonEncodableDiscreteResources empty() {
+ return new NonEncodableDiscreteResources();
+ }
+
+ private NonEncodableDiscreteResources() {
+ this.values = new LinkedHashSet<>();
+ }
+
+ NonEncodableDiscreteResources(List<DiscreteResource> values) {
+ this.values = new LinkedHashSet<>(values);
+ }
+
+ private NonEncodableDiscreteResources(Set<DiscreteResource> values) {
+ this.values = values;
+ }
+
+ @Override
+ public Optional<DiscreteResource> lookup(DiscreteResourceId id) {
+ DiscreteResource resource = Resources.discrete(id).resource();
+ if (values.contains(resource)) {
+ return Optional.of(resource);
+ } else {
+ return Optional.empty();
+ }
+ }
+
+ @Override
+ public DiscreteResources difference(DiscreteResources other) {
+ return new NonEncodableDiscreteResources(Sets.difference(this.values, other.values()));
+ }
+
+ @Override
+ public boolean isEmpty() {
+ return values.isEmpty();
+ }
+
+ @Override
+ public boolean containsAny(List<DiscreteResource> other) {
+ return other.stream().anyMatch(values::contains);
+ }
+
+ // returns a new instance, not mutate the current instance
+ @Override
+ public DiscreteResources add(DiscreteResources other) {
+ Set<DiscreteResource> newValues = new LinkedHashSet<>(this.values);
+ newValues.addAll(other.values());
+ return new NonEncodableDiscreteResources(newValues);
+ }
+
+ // returns a new instance, not mutate the current instance
+ @Override
+ public DiscreteResources remove(List<DiscreteResource> removed) {
+ Set<DiscreteResource> newValues = new LinkedHashSet<>(this.values);
+ newValues.removeAll(removed);
+ return new NonEncodableDiscreteResources(newValues);
+ }
+
+ @Override
+ public Set<DiscreteResource> values() {
+ // breaks immutability, but intentionally returns the field
+ // because this class is transient
+ return values;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(values);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj == null || getClass() != obj.getClass()) {
+ return false;
+ }
+ final NonEncodableDiscreteResources other = (NonEncodableDiscreteResources) obj;
+ return Objects.equals(this.values, other.values);
+ }
+
+ @Override
+ public String toString() {
+ return MoreObjects.toStringHelper(this)
+ .add("values", values)
+ .toString();
+ }
+}