[ONOS-7602]Implement support for P4Data in PI framework and P4Runtime southbound
Change-Id: I9c0c76fb29b8c3aa36f39bde62e825f0f0094253
diff --git a/core/api/src/main/java/org/onosproject/net/pi/runtime/data/PiHeaderUnionStack.java b/core/api/src/main/java/org/onosproject/net/pi/runtime/data/PiHeaderUnionStack.java
new file mode 100644
index 0000000..a1e39b8
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/pi/runtime/data/PiHeaderUnionStack.java
@@ -0,0 +1,90 @@
+/*
+ * 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.net.pi.runtime.data;
+
+import com.google.common.annotations.Beta;
+import com.google.common.base.Objects;
+import com.google.common.collect.ImmutableList;
+import org.onosproject.net.pi.model.PiData;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.StringJoiner;
+
+/**
+ * PiHeaderUnionStack entity in a protocol-independent pipeline.
+ */
+@Beta
+public final class PiHeaderUnionStack implements PiData {
+ private final ImmutableList<PiHeaderUnion> headerUnions;
+
+ /**
+ * Creates a new protocol-independent header union stack instance for the given collection of HeaderUnion.
+ *
+ * @param headerUnions the collection of headerUnion
+ */
+ private PiHeaderUnionStack(List<PiHeaderUnion> headerUnions) {
+ this.headerUnions = ImmutableList.copyOf(headerUnions);
+ }
+
+ /**
+ * Returns a new protocol-independent header union stack.
+ * @param headerUnions the list of headerUnion
+ * @return header union stack
+ */
+ public static PiHeaderUnionStack of(List<PiHeaderUnion> headerUnions) {
+ return new PiHeaderUnionStack(headerUnions);
+ }
+
+ /**
+ * Return the collection of header union.
+ *
+ * @return the collection header union
+ */
+ public Collection<PiHeaderUnion> headerUnions() {
+ return this.headerUnions;
+ }
+
+ @Override
+ public Type type() {
+ return Type.HEADERUNIONSTACK;
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (this == o) {
+ return true;
+ }
+ if (o == null || getClass() != o.getClass()) {
+ return false;
+ }
+ PiHeaderUnionStack headerUnionStack = (PiHeaderUnionStack) o;
+ return Objects.equal(headerUnions, headerUnionStack.headerUnions);
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hashCode(headerUnions);
+ }
+
+ @Override
+ public String toString() {
+ StringJoiner stringParams = new StringJoiner(", ", "(", ")");
+ this.headerUnions().forEach(p -> stringParams.add(p.toString()));
+ return stringParams.toString();
+ }
+}
\ No newline at end of file