Initial import of CFM and SOAM api

Change-Id: Icf5cc2d5fb34b75460e80e8cced0d70265bcd33b
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/l2monitoring/soam/delay/DefaultDelayMeasurementStatCurrent.java b/incubator/api/src/main/java/org/onosproject/incubator/net/l2monitoring/soam/delay/DefaultDelayMeasurementStatCurrent.java
new file mode 100644
index 0000000..7263134
--- /dev/null
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/l2monitoring/soam/delay/DefaultDelayMeasurementStatCurrent.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.incubator.net.l2monitoring.soam.delay;
+
+import java.time.Duration;
+import java.time.Instant;
+
+/**
+ * The default implementation of DelayMeasurementStatCurrent.
+ * {@link org.onosproject.incubator.net.l2monitoring.soam.delay.DelayMeasurementStatCurrent}.
+ */
+public final class DefaultDelayMeasurementStatCurrent
+    extends DefaultDelayMeasurementStat
+    implements DelayMeasurementStatCurrent {
+
+    private final Instant startTime;
+
+    protected DefaultDelayMeasurementStatCurrent(DefaultDmStatCurrentBuilder builder) {
+        super(builder);
+        this.startTime = builder.startTime;
+    }
+
+    @Override
+    public Instant startTime() {
+        return startTime;
+    }
+
+    public static DmStatCurrentBuilder builder(Duration elapsedTime, boolean suspectStatus) {
+        return new DefaultDmStatCurrentBuilder(elapsedTime, suspectStatus);
+    }
+
+    /**
+     * Builder for {@link org.onosproject.incubator.net.l2monitoring.soam.delay.DelayMeasurementStatCurrent}.
+     */
+    private static final class DefaultDmStatCurrentBuilder extends DefaultDmStatBuilder
+        implements DmStatCurrentBuilder {
+
+        private Instant startTime;
+
+        private DefaultDmStatCurrentBuilder(Duration elapsedTime, boolean suspectStatus) {
+            super(elapsedTime, suspectStatus);
+        }
+
+        @Override
+        public DmStatCurrentBuilder startTime(Instant startTime) {
+            this.startTime = startTime;
+            return this;
+        }
+
+        @Override
+        public DelayMeasurementStat build() {
+            return new DefaultDelayMeasurementStatCurrent(this);
+        }
+    }
+}