DATACMNS-187 - Added getRevisionDate() to Revision.

Revision now exposes the revision date of the underlying metadata.

spring-data-commons-core/src/main/java/org/springframework/data/history/Revision.java

@@ -15,6 +15,7 @@
  */
 package org.springframework.data.history;
 
+import org.joda.time.DateTime;
 import org.springframework.util.Assert;
 
 /**
@@ -52,6 +53,15 @@ public N getRevisionNumber() {
 		return metadata.getRevisionNumber();
 	}
 
+	/**
+	 * Returns the revision date of the revision.
+	 * 
+	 * @return
+	 */
+	public DateTime getRevisionDate() {
+		return metadata.getRevisionDate();
+	}
+
 	/**
 	 * Returns the underlying entity.
 	 * 

spring-data-commons-core/src/test/java/org/springframework/data/history/RevisionUnitTests.java

@@ -23,6 +23,7 @@
 import java.util.Collections;
 import java.util.List;
 
+import org.joda.time.DateTime;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
@@ -55,4 +56,31 @@ public void comparesCorrectly() {
 		assertThat(revisions.get(0), is(first));
 		assertThat(revisions.get(1), is(second));
 	}
+
+	/**
+	 * @see DATACMNS-187
+	 */
+	@Test
+	public void returnsRevisionNumber() {
+
+		when(firstMetadata.getRevisionNumber()).thenReturn(4711);
+
+		Revision<Integer, Object> revision = new Revision<Integer, Object>(firstMetadata, new Object());
+
+		assertThat(revision.getRevisionNumber(), is(4711));
+	}
+
+	/**
+	 * @see DATACMNS-187
+	 */
+	@Test
+	public void returnsRevisionDate() {
+
+		DateTime reference = new DateTime();
+		when(firstMetadata.getRevisionDate()).thenReturn(reference);
+
+		Revision<Integer, Object> revision = new Revision<Integer, Object>(firstMetadata, new Object());
+
+		assertThat(revision.getRevisionDate(), is(reference));
+	}
 }