Introducing BandwidthProfileConfigBehaviour to manage policers/markers

- Creating BandwidthProfile Class to represent generic policers/markers
- BandwidthProfile can be Single/Two Rate, Two/Three Color depending on parameters
- Including fromMeter() method to convert a Meter into a BandwidthProfile
- Adding unit tests for BandwidthProfile class
- Creating BandwidthProfileAction class to represent a color (green/yellow/red) action
- BandwidthProfileAction allows remarking one of: DSCP class, IP precedence, Drop precedence
- Adding unit tests for BandwidthProfileAction class
- Creating DscpClass and IPPrecedence Enums and unit tests in org.onlab.packet
- Adding kBps/MBps/GBps methods in org.onlab.util.Bandwidth class

Change-Id: I54156329a527ebd9165d8f55e03e0782925caa2b
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/BandwidthProfileAction.java b/core/api/src/main/java/org/onosproject/net/behaviour/BandwidthProfileAction.java
new file mode 100644
index 0000000..ae6a153
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/BandwidthProfileAction.java
@@ -0,0 +1,223 @@
+/*
+ * 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.net.behaviour;
+
+import com.google.common.annotations.Beta;
+import com.google.common.base.MoreObjects;
+import org.onlab.packet.DscpClass;
+import org.onlab.packet.IPPrecedence;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import java.util.Objects;
+
+/**
+ * Represents an action to be taken by a marker/policer.
+ */
+@Beta
+public final class BandwidthProfileAction {
+
+    /**
+     * Denotes the type of action to be taken.
+     */
+    public enum Action {
+        /**
+         * Traffic is allowed to pass unmodified.
+         */
+        PASS,
+
+        /**
+         * Traffic is allowed to pass after being appropriately remarked.
+         */
+        REMARK,
+
+        /**
+         * Traffic is dropped.
+         */
+        DISCARD
+    }
+
+    private final Action action;
+    private final DscpClass dscpClass;
+    private final IPPrecedence ipPrecedence;
+    private final Short dropPrecedence;
+
+    private BandwidthProfileAction(Action action,
+                                   DscpClass dscpClass,
+                                   IPPrecedence ipPrecedence,
+                                   Short dropPrecedence) {
+        this.action = action;
+        this.dscpClass = dscpClass;
+        this.ipPrecedence = ipPrecedence;
+        this.dropPrecedence = dropPrecedence;
+    }
+
+    /**
+     * Obtains the type of this bandwidth profile action object.
+     *
+     * @return the bandwidth profile action type
+     */
+    public Action getAction() {
+        return this.action;
+    }
+
+    /**
+     * Obtains the DSCP class corresponding to the REMARK action.
+     * If this is not a REMARK action or if another field is remarked
+     * null is returned.
+     *
+     * @return the DSCP class for the action; may be null
+     */
+    public DscpClass getDscpClass() {
+        return this.dscpClass;
+    }
+
+    /**
+     * Obtains the IP precedence corresponding to the REMARK action.
+     * If this is not a REMARK action or if another field is remarked
+     * null is returned.
+     *
+     * @return the IP precedence for the action; may be null
+     */
+    public IPPrecedence getIpPrecedence() {
+        return this.ipPrecedence;
+    }
+
+    /**
+     * Obtains the drop precedence corresponding to the REMARK action.
+     * If this is not a REMARK action or if another field is remarked
+     * null is returned.
+     *
+     * @return the drop precedence for the action; may be null
+     */
+    public Short getDropPrecedence() {
+        return this.dropPrecedence;
+    }
+
+    /**
+     * Returns a new builder.
+     *
+     * @return new builder
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * Builder of BandwidthProfileAction entities.
+     */
+    public static final class Builder {
+
+        private Action action;
+        private DscpClass dscpClass;
+        private IPPrecedence ipPrecedence;
+        private Short dropPrecedence;
+
+        /**
+         * Sets the type of this builder.
+         *
+         * @param action the builder type to set
+         * @return this builder instance
+         */
+        public Builder action(Action action) {
+            this.action = action;
+            return this;
+        }
+
+        /**
+         * Sets the DSCP class of this builder.
+         *
+         * @param dscpClass the builder DSCP class to set
+         * @return this builder instance
+         */
+        public Builder dscpClass(DscpClass dscpClass) {
+            this.dscpClass = dscpClass;
+            return this;
+        }
+
+        /**
+         * Sets the IP precedence of this builder.
+         *
+         * @param ipPrecedence the builder IP precedence to set
+         * @return this builder instance
+         */
+        public Builder ipPrecedence(IPPrecedence ipPrecedence) {
+            this.ipPrecedence = ipPrecedence;
+            return this;
+        }
+
+        /**
+         * Sets the drop precedence of this builder.
+         *
+         * @param dropPrecedence the drop IP precedence to set
+         * @return this builder instance
+         */
+        public Builder dropPrecedence(Short dropPrecedence) {
+            this.dropPrecedence = dropPrecedence;
+            return this;
+        }
+
+        /**
+         * Builds a new BandwidthProfileAction based on builder's parameters.
+         *
+         * @return a new BandwidthProfileAction instance
+         */
+        public BandwidthProfileAction build() {
+            checkNotNull(action);
+            checkArgument(!action.equals(Action.REMARK) ||
+                                  (dscpClass != null ^
+                                          ipPrecedence != null ^
+                                          dropPrecedence != null),
+                          "Exactly one remark type must be defined");
+            return new BandwidthProfileAction(action,
+                                              dscpClass,
+                                              ipPrecedence,
+                                              dropPrecedence);
+        }
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(action, dscpClass, ipPrecedence, dropPrecedence);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof BandwidthProfileAction) {
+            final BandwidthProfileAction that = (BandwidthProfileAction) obj;
+            return this.getClass() == that.getClass() &&
+                    Objects.equals(this.action, that.action) &&
+                    Objects.equals(this.dscpClass, that.dscpClass) &&
+                    Objects.equals(this.ipPrecedence, that.ipPrecedence) &&
+                    Objects.equals(this.dropPrecedence, that.dropPrecedence);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("action", action == null ? null : action.name())
+                .add("dscpClass", dscpClass == null ? null : dscpClass.name())
+                .add("ipPrecedence", ipPrecedence)
+                .add("dropPrecedence", dropPrecedence)
+                .toString();
+    }
+}