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+/*
+ * Copyright 2015 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.flowobjective;
+
+import com.google.common.annotations.Beta;
+import org.onosproject.net.flow.TrafficSelector;
+import org.onosproject.net.flow.TrafficTreatment;
+
+/**
+ * Represents a description of which types of traffic need to
+ * be forwarded through the device. A forwarding objective may
+ * result in multiple rules at the device. There are two main types
+ * of forwarding objectives:
+ *
+ * - Versatile
+ * - Specific
+ *
+ * A versatile forwarding objective represents a composite rule that matches
+ * two or more header fields. The use of versatile usually indicates that this
+ * rule should be inserted in its entirety into the ACL table. Although,
+ * drivers for some devices are free to implement this differently.
+ *
+ * A specific forwarding objective represents a specific rule matching one or
+ * more header fields. The installation of this rule may result in several rules
+ * at the device. For example, one per table type.
+ */
+@Beta
+public interface ForwardingObjective extends Objective {
+
+ /**
+ * Represents whether this objective is monolithic or
+ * may be broken down into parts.
+ */
+ enum Flag {
+ /**
+ * A decomposable objective.
+ */
+ SPECIFIC,
+
+ /**
+ * A monolithic objective.
+ */
+ VERSATILE
+ }
+
+ /**
+ * Obtain the selector for this objective.
+ *
+ * @return a traffic selector
+ */
+ TrafficSelector selector();
+
+ /**
+ * Obtain the traffic treatment for this objective. Mutually exclusive with
+ * 'treatment'.
+ *
+ * @return an integer
+ */
+ Integer nextId();
+
+ /**
+ * A traffic treatment for this forwarding objective. Mutually exclusive
+ * with a nextId.
+ *
+ * @return a traffic treatment
+ */
+ TrafficTreatment treatment();
+
+ /**
+ * Obtain the type of this objective.
+ *
+ * @return a flag type
+ */
+ Flag flag();
+
+ /**
+ * A forwarding objective builder.
+ */
+ interface Builder extends Objective.Builder {
+
+ /**
+ * Assigns a selector to the forwarding objective.
+ *
+ * @param selector a traffic selector
+ * @return a forwarding objective builder
+ */
+ Builder withSelector(TrafficSelector selector);
+
+ /**
+ * Assigns a next step to the forwarding objective.
+ *
+ * @param nextId a next objective id.
+ * @return a forwarding objective builder
+ */
+ Builder nextStep(int nextId);
+
+ /**
+ * Assigns the treatment for this forwarding objective.
+ *
+ * @param treatment a traffic treatment
+ * @return a forwarding objective
+ */
+ Builder withTreatment(TrafficTreatment treatment);
+
+ /**
+ * Assigns the flag to the forwarding objective.
+ *
+ * @param flag a flag
+ * @return a forwarding objective builder
+ */
+ Builder withFlag(Flag flag);
+
+ /**
+ * Builds the forwarding objective that will be added.
+ *
+ * @return a forwarding objective
+ */
+ ForwardingObjective add();
+
+ /**
+ * Builds the forwarding objective that will be removed.
+ *
+ * @return a forwarding objective.
+ */
+ ForwardingObjective remove();
+
+ /**
+ * Builds the forwarding objective that will be added.
+ * The context will be used to notify the calling application.
+ *
+ * @param context an objective context
+ * @return a forwarding objective
+ */
+ ForwardingObjective add(ObjectiveContext context);
+
+ /**
+ * Builds the forwarding objective that will be removed.
+ * The context will be used to notify the calling application.
+ *
+ * @param context an objective context
+ * @return a forwarding objective
+ */
+ ForwardingObjective remove(ObjectiveContext context);
+ }
+}