Pi classes to support P4Runtime action profiles
+ modified default.p4 with ECMP capabilities (via action profiles)
+ sketched translation logic of ONOS groups (in Bmv2GroupProgrammable)
+ replaced existing instances of default.json/p4info with symlinks to
p4src build directory (to avoid inconsistencies)
Change-Id: If82f0b8ce296c9b616415d99864d216b77645a87
diff --git a/core/api/src/main/java/org/onosproject/net/pi/runtime/PiActionGroup.java b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiActionGroup.java
new file mode 100644
index 0000000..57fab9d
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiActionGroup.java
@@ -0,0 +1,190 @@
+/*
+ * Copyright 2017-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.pi.runtime;
+
+import com.google.common.annotations.Beta;
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Maps;
+
+import java.util.Collection;
+import java.util.Map;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Action group of a protocol-independent pipeline.
+ */
+@Beta
+public final class PiActionGroup {
+
+ /**
+ * Type of action group.
+ */
+ public enum Type {
+ /**
+ * Load-balancing among different members in a group.
+ */
+ SELECT
+ }
+
+ private final PiActionGroupId id;
+ private final Type type;
+ private final ImmutableSet<PiActionGroupMember> members;
+
+ private PiActionGroup(PiActionGroupId id, Type type, ImmutableSet<PiActionGroupMember> members) {
+ this.id = id;
+ this.type = type;
+ this.members = members;
+ }
+
+ /**
+ * Returns the identifier of this action group.
+ *
+ * @return action group identifier
+ */
+ public PiActionGroupId id() {
+ return id;
+ }
+
+ /**
+ * Returns the type of this action group.
+ *
+ * @return action group type
+ */
+ public Type type() {
+ return type;
+ }
+
+ /**
+ * Returns the members of this action group.
+ *
+ * @return collection of action members.
+ */
+ public Collection<PiActionGroupMember> members() {
+ return members;
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (this == o) {
+ return true;
+ }
+ if (o == null || getClass() != o.getClass()) {
+ return false;
+ }
+ PiActionGroup that = (PiActionGroup) o;
+ return id == that.id &&
+ Objects.equal(type, that.type) &&
+ Objects.equal(members, that.members);
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hashCode(id, type, members);
+ }
+
+ @Override
+ public String toString() {
+ return MoreObjects.toStringHelper(this)
+ .add("groupId", id)
+ .add("type", type)
+ .add("members", members)
+ .toString();
+ }
+
+ /**
+ * Returns a new builder of action groups.
+ *
+ * @return action group builder
+ */
+ public static Builder builder() {
+ return new Builder();
+ }
+
+ /**
+ * Builder of action groups.
+ */
+ public static final class Builder {
+
+ private PiActionGroupId id;
+ private Type type;
+ private Map<PiActionGroupMemberId, PiActionGroupMember> members = Maps.newHashMap();
+
+ private Builder() {
+ // hides constructor.
+ }
+
+ /**
+ * Sets the identifier of this action group.
+ *
+ * @param id action group identifier
+ * @return this
+ */
+ public Builder withId(PiActionGroupId id) {
+ this.id = id;
+ return this;
+ }
+
+ /**
+ * Sets the type of this action group.
+ *
+ * @param type action group type
+ * @return this
+ */
+ public Builder withType(Type type) {
+ this.type = type;
+ return this;
+ }
+
+ /**
+ * Adds one member to this action group.
+ *
+ * @param member action group member
+ * @return this
+ */
+ public Builder addMember(PiActionGroupMember member) {
+ members.put(member.id(), member);
+ return this;
+ }
+
+ /**
+ * Adds many members to this action group.
+ *
+ * @param members action group members
+ * @return this
+ */
+ public Builder addMembers(Collection<PiActionGroupMember> members) {
+ members.forEach(this::addMember);
+ return this;
+ }
+
+ /**
+ * Creates a new action group.
+ *
+ * @return action group
+ */
+ public PiActionGroup build() {
+ checkNotNull(id);
+ checkNotNull(type);
+ checkArgument(members.size() > 0, "Members cannot be empty");
+ return new PiActionGroup(id, type, ImmutableSet.copyOf(members.values()));
+ }
+ }
+}