[ONOS-7731] Add implementation of openstack vtap store and criterion

Change-Id: I7f41652f127038af9d3f79b34d427d28ce162d50
diff --git a/apps/openstackvtap/app/src/main/java/org/onosproject/openstackvtap/impl/DefaultOpenstackVtap.java b/apps/openstackvtap/app/src/main/java/org/onosproject/openstackvtap/impl/DefaultOpenstackVtap.java
new file mode 100644
index 0000000..7e51be5
--- /dev/null
+++ b/apps/openstackvtap/app/src/main/java/org/onosproject/openstackvtap/impl/DefaultOpenstackVtap.java
@@ -0,0 +1,199 @@
+/*
+ * Copyright 2018-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.openstackvtap.impl;
+
+import com.google.common.base.Objects;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Sets;
+import org.onosproject.net.AbstractDescription;
+import org.onosproject.net.DefaultAnnotations;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.SparseAnnotations;
+import org.onosproject.openstackvtap.api.OpenstackVtap;
+import org.onosproject.openstackvtap.api.OpenstackVtapCriterion;
+import org.onosproject.openstackvtap.api.OpenstackVtapId;
+
+import java.util.Set;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+import static com.google.common.base.Preconditions.checkArgument;
+
+/**
+ * Default implementation of an immutable openstack vTap.
+ */
+public final class DefaultOpenstackVtap extends AbstractDescription implements OpenstackVtap {
+
+    private final OpenstackVtapId id;
+    private final Type type;
+    private final OpenstackVtapCriterion vTapCriterion;
+    private final Set<DeviceId> txDeviceIds;
+    private final Set<DeviceId> rxDeviceIds;
+
+    // private constructor not intended to use from external
+    private DefaultOpenstackVtap(OpenstackVtapId id, Type type,
+                                 OpenstackVtapCriterion vTapCriterion,
+                                 Set<DeviceId> txDeviceIds, Set<DeviceId> rxDeviceIds,
+                                 SparseAnnotations... annotations) {
+        super(annotations);
+        this.id = id;
+        this.type = type;
+        this.vTapCriterion = vTapCriterion;
+        this.txDeviceIds = txDeviceIds;
+        this.rxDeviceIds = rxDeviceIds;
+    }
+
+    @Override
+    public OpenstackVtapId id() {
+        return id;
+    }
+
+    @Override
+    public Type type() {
+        return type;
+    }
+
+    @Override
+    public OpenstackVtapCriterion vTapCriterion() {
+        return vTapCriterion;
+    }
+
+    @Override
+    public Set<DeviceId> txDeviceIds() {
+        return ImmutableSet.copyOf(txDeviceIds);
+    }
+
+    @Override
+    public Set<DeviceId> rxDeviceIds() {
+        return ImmutableSet.copyOf(rxDeviceIds);
+    }
+
+    @Override
+    public String toString() {
+        return toStringHelper(this)
+                .add("id", id)
+                .add("type", type)
+                .add("vTapCriterion", vTapCriterion)
+                .add("txDeviceIds", txDeviceIds)
+                .add("rxDeviceIds", rxDeviceIds)
+                .toString();
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(super.hashCode(),
+                id,
+                type,
+                vTapCriterion,
+                txDeviceIds,
+                rxDeviceIds);
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (object != null && getClass() == object.getClass()) {
+            if (!super.equals(object)) {
+                return false;
+            }
+            DefaultOpenstackVtap that = (DefaultOpenstackVtap) object;
+            return Objects.equal(this.id, that.id)
+                    && Objects.equal(this.type, that.type)
+                    && Objects.equal(this.vTapCriterion, that.vTapCriterion)
+                    && Objects.equal(this.txDeviceIds, that.txDeviceIds)
+                    && Objects.equal(this.rxDeviceIds, that.rxDeviceIds);
+        }
+        return false;
+    }
+
+    /**
+     * Creates a new default openstack vTap builder.
+     *
+     * @return default openstack vTap builder
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * Builder for DefaultOpenstackVtap object.
+     */
+    public static class Builder implements OpenstackVtap.Builder {
+        private static final SparseAnnotations EMPTY = DefaultAnnotations.builder().build();
+
+        private OpenstackVtapId id;
+        private Type type;
+        private OpenstackVtapCriterion vTapCriterion;
+        private Set<DeviceId> txDeviceIds;
+        private Set<DeviceId> rxDeviceIds;
+        private SparseAnnotations annotations = EMPTY;
+
+        // private constructor not intended to use from external
+        Builder() {
+        }
+
+        @Override
+        public Builder id(OpenstackVtapId id) {
+            this.id = id;
+            return this;
+        }
+
+        @Override
+        public Builder type(Type type) {
+            this.type = type;
+            return this;
+        }
+
+        @Override
+        public Builder vTapCriterion(OpenstackVtapCriterion vTapCriterion) {
+            this.vTapCriterion = vTapCriterion;
+            return this;
+        }
+
+        @Override
+        public Builder txDeviceIds(Set<DeviceId> txDeviceIds) {
+            if (txDeviceIds != null) {
+                this.txDeviceIds = ImmutableSet.copyOf(txDeviceIds);
+            } else {
+                this.txDeviceIds = Sets.newHashSet();
+            }
+            return this;
+        }
+
+        @Override
+        public Builder rxDeviceIds(Set<DeviceId> rxDeviceIds) {
+            if (rxDeviceIds != null) {
+                this.rxDeviceIds = ImmutableSet.copyOf(rxDeviceIds);
+            } else {
+                this.rxDeviceIds = Sets.newHashSet();
+            }
+            return this;
+        }
+
+        @Override
+        public Builder annotations(SparseAnnotations... annotations) {
+            checkArgument(annotations.length <= 1,
+                    "Only one set of annotations is expected");
+            this.annotations = annotations.length == 1 ? annotations[0] : EMPTY;
+            return this;
+        }
+
+        @Override
+        public DefaultOpenstackVtap build() {
+            return new DefaultOpenstackVtap(id, type, vTapCriterion,
+                                            txDeviceIds, rxDeviceIds, annotations);
+        }
+    }
+
+}