[ONOS-6554] Implement BMv2-JSON-to-PiPipelineModel parser

1. Create new module incubator/bmv2/model
2. Move all bmv2 model files to incubator/bmv2/model
3. Using PI core interfaces for all bmv2 models
4. Refactor original bmv2 config parser (Bmv2PipelineModelParser)
5. Refactor original bmv2 config parser test

Change-Id: I0db07762d76ab6e2f846e9c3c9d5896f0cbea7f2
diff --git a/incubator/bmv2/model/src/main/java/org/onosproject/bmv2/model/Bmv2PipelineModel.java b/incubator/bmv2/model/src/main/java/org/onosproject/bmv2/model/Bmv2PipelineModel.java
new file mode 100644
index 0000000..3da1bc6
--- /dev/null
+++ b/incubator/bmv2/model/src/main/java/org/onosproject/bmv2/model/Bmv2PipelineModel.java
@@ -0,0 +1,146 @@
+/*
+ * 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.bmv2.model;
+
+import com.google.common.annotations.Beta;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+import org.onosproject.net.pi.model.PiActionModel;
+import org.onosproject.net.pi.model.PiHeaderModel;
+import org.onosproject.net.pi.model.PiHeaderTypeModel;
+import org.onosproject.net.pi.model.PiPipelineModel;
+import org.onosproject.net.pi.model.PiTableModel;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * BMv2 pipeline model.
+ */
+@Beta
+public class Bmv2PipelineModel implements PiPipelineModel {
+    private final Map<String, PiHeaderTypeModel> headerTypeModels;
+    private final Map<String, PiHeaderModel> headerModels;
+    private final Map<String, PiActionModel> actionModels;
+    private final Map<String, PiTableModel> tableModels;
+
+    /**
+     * Constructs a BMv2 pipeline model by given information.
+     *
+     * @param headerTypeModels the header type models for this pipeline model
+     * @param headerModels the header models for this pipeline model
+     * @param actionModels the action models for this pipeline model
+     * @param tableModels the table models for this pipeline model
+     */
+    Bmv2PipelineModel(List<Bmv2HeaderTypeModel> headerTypeModels,
+                      List<Bmv2HeaderModel> headerModels,
+                      List<Bmv2ActionModel> actionModels,
+                      List<Bmv2TableModel> tableModels) {
+        checkNotNull(headerTypeModels, "Header type models can't be null");
+        checkNotNull(headerModels, "Header models can't be null");
+        checkNotNull(actionModels, "Action models can't be null");
+        checkNotNull(tableModels, "Table models can't be null");
+
+        Map<String, PiHeaderTypeModel> headerTypeModelMap = Maps.newHashMap();
+        headerTypeModels.stream()
+                .filter(Objects::nonNull)
+                .forEach(htm -> headerTypeModelMap.put(htm.name(), htm));
+        this.headerTypeModels = ImmutableMap.copyOf(headerTypeModelMap);
+
+        Map<String, PiHeaderModel> headerModelMap = Maps.newHashMap();
+        headerModels.stream()
+                .filter(Objects::nonNull)
+                .forEach(hm -> headerModelMap.put(hm.type().name(), hm));
+        this.headerModels = ImmutableMap.copyOf(headerModelMap);
+
+        Map<String, PiActionModel> actionModelMap = Maps.newHashMap();
+        actionModels.stream()
+                .filter(Objects::nonNull)
+                .forEach(am -> actionModelMap.put(am.name(), am));
+        this.actionModels = ImmutableMap.copyOf(actionModelMap);
+
+        Map<String, PiTableModel> tableModelMap = Maps.newHashMap();
+        tableModels.stream()
+                .filter(Objects::nonNull)
+                .forEach(tm -> tableModelMap.put(tm.name(), tm));
+        this.tableModels = ImmutableMap.copyOf(tableModelMap);
+    }
+
+    @Override
+    public Optional<PiHeaderTypeModel> headerType(String name) {
+        return Optional.ofNullable(headerTypeModels.get(name));
+    }
+
+    @Override
+    public Collection<PiHeaderTypeModel> headerTypes() {
+        return headerTypeModels.values();
+    }
+
+    @Override
+    public Optional<PiHeaderModel> header(String name) {
+        return Optional.ofNullable(headerModels.get(name));
+    }
+
+    @Override
+    public Collection<PiHeaderModel> headers() {
+        return headerModels.values();
+    }
+
+    @Override
+    public Optional<PiActionModel> action(String name) {
+        return Optional.ofNullable(actionModels.get(name));
+    }
+
+    @Override
+    public Collection<PiActionModel> actions() {
+        return actionModels.values();
+    }
+
+    @Override
+    public Optional<PiTableModel> table(String name) {
+        return Optional.ofNullable(tableModels.get(name));
+    }
+
+    @Override
+    public Collection<PiTableModel> tables() {
+        return tableModels.values();
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(headerTypeModels, headerModels, actionModels, tableModels);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) {
+            return true;
+        }
+        if (!(obj instanceof Bmv2PipelineModel)) {
+            return false;
+        }
+        Bmv2PipelineModel that = (Bmv2PipelineModel) obj;
+        return Objects.equals(this.headerTypeModels, that.headerTypeModels) &&
+                Objects.equals(this.headerModels, that.headerModels) &&
+                Objects.equals(this.actionModels, that.actionModels) &&
+                Objects.equals(this.tableModels, that.tableModels);
+    }
+}