Removed hardcoded model from BMv2 driver

Now it uses the model stored in device annotations. Also refactored flow
rule translator classes to reflect this change.

Change-Id: I46541bcc2ab5a267eef4becb6250b9a99684056a
diff --git a/drivers/bmv2/src/main/java/org/onosproject/drivers/bmv2/translators/Bmv2DefaultTranslatorConfig.java b/drivers/bmv2/src/main/java/org/onosproject/drivers/bmv2/translators/Bmv2DefaultTranslatorConfig.java
new file mode 100644
index 0000000..dc7bdcd
--- /dev/null
+++ b/drivers/bmv2/src/main/java/org/onosproject/drivers/bmv2/translators/Bmv2DefaultTranslatorConfig.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2016-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.drivers.bmv2.translators;
+
+import com.google.common.annotations.Beta;
+import org.onosproject.bmv2.api.model.Bmv2Model;
+import org.onosproject.net.flow.criteria.Criterion;
+
+import java.util.Map;
+
+import static org.onosproject.drivers.bmv2.translators.Bmv2FlowRuleTranslator.TranslatorConfig;
+
+/**
+ * Default implementation of a BMv2 flow rule translator configuration.
+ */
+@Beta
+public abstract class Bmv2DefaultTranslatorConfig implements TranslatorConfig {
+
+    private final Bmv2Model model;
+    private final Map<String, Criterion.Type> fieldMap;
+
+    /**
+     * Creates a new translator configuration.
+     *
+     * @param model    a BMv2 packet processing model
+     * @param fieldMap a field-to-criterion type map
+     */
+    protected Bmv2DefaultTranslatorConfig(Bmv2Model model, Map<String, Criterion.Type> fieldMap) {
+        this.model = model;
+        this.fieldMap = fieldMap;
+    }
+
+    @Override
+    public Bmv2Model model() {
+        return this.model;
+    }
+
+    @Override
+    public Map<String, Criterion.Type> fieldToCriterionTypeMap() {
+        return this.fieldMap;
+    }
+}