Added builder for PortDescription

Change-Id: I37cf78ba7d2cebb021806a0441f2bf231a855c28

core/api/src/main/java/org/onosproject/net/device/DefaultPortDescription.java

@@ -17,9 +17,9 @@ package org.onosproject.net.device;
 
 import com.google.common.base.MoreObjects;
 import org.onosproject.net.AbstractDescription;
+import org.onosproject.net.DefaultAnnotations;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.SparseAnnotations;
-
 import static com.google.common.base.Preconditions.checkNotNull;
 import static org.onosproject.net.Port.Type;
 import com.google.common.base.Objects;
@@ -177,4 +177,118 @@ public class DefaultPortDescription extends AbstractDescription
         return false;
     }
 
+    /**
+     * Creates port description builder with default parameters.
+     *
+     * @return builder
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * Creates port description builder inheriting with default parameters,
+     * from specified port description.
+     *
+     * @param desc to inherit default from
+     * @return builder
+     */
+    public static Builder builder(PortDescription desc) {
+        return new Builder(desc);
+    }
+
+    public static class Builder {
+        private PortNumber number;
+        private boolean isEnabled = true;
+        private boolean isRemoved = false;
+        private Type type = Type.COPPER;
+        private long portSpeed = DEFAULT_SPEED;
+        private SparseAnnotations annotations = DefaultAnnotations.EMPTY;
+
+        Builder() {}
+
+        Builder(PortDescription desc) {
+            this.number = desc.portNumber();
+            this.isEnabled = desc.isEnabled();
+            this.isRemoved = desc.isRemoved();
+            this.type = desc.type();
+            this.portSpeed = desc.portSpeed();
+            this.annotations  = desc.annotations();
+        }
+
+        /**
+         * Sets mandatory field PortNumber.
+         *
+         * @param number to set
+         * @return self
+         */
+        public Builder withPortNumer(PortNumber number) {
+            this.number = checkNotNull(number);
+            return this;
+        }
+
+        /**
+         * Sets enabled state.
+         *
+         * @param enabled state
+         * @return self
+         */
+        public Builder isEnabled(boolean enabled) {
+            this.isEnabled = enabled;
+            return this;
+        }
+
+        /**
+         * Sets removed state.
+         *
+         * @param removed state
+         * @return self
+         */
+        public Builder isRemoved(boolean removed) {
+            this.isRemoved = removed;
+            return this;
+        }
+
+        /**
+         * Sets port type.
+         *
+         * @param type of the port
+         * @return self
+         */
+        public Builder type(Type type) {
+            this.type = type;
+            return this;
+        }
+
+        /**
+         * Sets port speed.
+         *
+         * @param mbps port speed in Mbps
+         * @return self
+         */
+        public Builder portSpeed(long mbps) {
+            this.portSpeed = mbps;
+            return this;
+        }
+
+        /**
+         * Sets annotations.
+         *
+         * @param annotations of the port
+         * @return self
+         */
+        public Builder annotations(SparseAnnotations annotations) {
+            this.annotations = checkNotNull(annotations);
+            return this;
+        }
+
+        /**
+         * Builds the port description.
+         *
+         * @return port description
+         */
+        public DefaultPortDescription build() {
+            return new DefaultPortDescription(number, isEnabled, isRemoved, type, portSpeed, annotations);
+        }
+    }
 }