1 files changed, 119 insertions, 0 deletions
diff --git a/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/impl/Timestamped.java b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/impl/Timestamped.java
new file mode 100644
index 00000000..ae7267b8
--- /dev/null
+++ b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/impl/Timestamped.java
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2014-2015 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.store.impl;
+
+import com.google.common.base.MoreObjects;
+import org.onosproject.store.Timestamp;
+
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Wrapper class to store Timestamped value.
+ *
+ * @param <T> Timestamped value type
+ */
+public final class Timestamped<T> {
+
+    private final Timestamp timestamp;
+    private final T value;
+
+    /**
+     * Creates a time stamped value.
+     *
+     * @param value to be timestamp
+     * @param timestamp the timestamp
+     */
+    public Timestamped(T value, Timestamp timestamp) {
+        this.value = checkNotNull(value);
+        this.timestamp = checkNotNull(timestamp);
+    }
+
+    /**
+     * Returns the value.
+     *
+     * @return value
+     */
+    public T value() {
+        return value;
+    }
+
+    /**
+     * Returns the time stamp.
+     *
+     * @return time stamp
+     */
+    public Timestamp timestamp() {
+        return timestamp;
+    }
+
+    /**
+     * Tests if this timestamped value is newer than the other.
+     *
+     * @param other timestamped value
+     * @return true if this instance is newer.
+     */
+    public boolean isNewer(Timestamped<T> other) {
+        return isNewerThan(checkNotNull(other).timestamp());
+    }
+
+    /**
+     * Tests if this timestamp is newer than the specified timestamp.
+     *
+     * @param other timestamp to compare against
+     * @return true if this instance is newer
+     */
+    public boolean isNewerThan(Timestamp other) {
+        return timestamp.isNewerThan(other);
+    }
+
+    @Override
+    public int hashCode() {
+        return timestamp.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof Timestamped)) {
+            return false;
+        }
+        @SuppressWarnings("unchecked")
+        Timestamped<T> that = (Timestamped<T>) obj;
+        return Objects.equals(this.timestamp, that.timestamp);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                    .add("timestamp", timestamp)
+                    .add("value", value)
+                    .toString();
+    }
+
+    // Default constructor for serialization
+    /**
+     * @deprecated in Cardinal Release
+     */
+    @Deprecated
+    private Timestamped() {
+        this.value = null;
+        this.timestamp = null;
+    }
+}