ONOS-7066 ONOS-7067 PI abstractions refactoring and P4Info model parser

Includes changes previously reviewed in #15607, #15877, and #15955.

Change-Id: Ie2ff62e415f2099832ebfe05961a879b7b188fc3
diff --git a/protocols/p4runtime/model/src/main/java/org/onosproject/p4runtime/model/P4PacketOperationModel.java b/protocols/p4runtime/model/src/main/java/org/onosproject/p4runtime/model/P4PacketOperationModel.java
new file mode 100644
index 0000000..84e2fe4
--- /dev/null
+++ b/protocols/p4runtime/model/src/main/java/org/onosproject/p4runtime/model/P4PacketOperationModel.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2017-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.p4runtime.model;
+
+import com.google.common.collect.ImmutableList;
+import org.onosproject.net.pi.model.PiControlMetadataModel;
+import org.onosproject.net.pi.model.PiPacketOperationModel;
+import org.onosproject.net.pi.model.PiPacketOperationType;
+
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Implementation of PiPacketOperationModel for P4Runtime.
+ */
+final class P4PacketOperationModel implements PiPacketOperationModel {
+
+    private final PiPacketOperationType type;
+    private final ImmutableList<PiControlMetadataModel> metadatas;
+
+    P4PacketOperationModel(PiPacketOperationType type,
+                                  ImmutableList<PiControlMetadataModel> metadatas) {
+        this.type = type;
+        this.metadatas = metadatas;
+    }
+
+    @Override
+    public PiPacketOperationType type() {
+        return type;
+    }
+
+    @Override
+    public List<PiControlMetadataModel> metadatas() {
+        return metadatas;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(type, metadatas);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null || getClass() != obj.getClass()) {
+            return false;
+        }
+        final P4PacketOperationModel other = (P4PacketOperationModel) obj;
+        return Objects.equals(this.type, other.type)
+                && Objects.equals(this.metadatas, other.metadatas);
+    }
+}