Expiration annotation on field will retrieve expiration in N1ql queries. (#1188)

Closes #1060.

src/test/java/org/springframework/data/couchbase/domain/Airport.java

@@ -22,6 +22,7 @@ import org.springframework.data.annotation.PersistenceConstructor;
 import org.springframework.data.annotation.TypeAlias;
 import org.springframework.data.annotation.Version;
 import org.springframework.data.couchbase.core.mapping.Document;
+import org.springframework.data.couchbase.core.mapping.Expiration;
 
 /**
  * Airport entity
@@ -41,6 +42,7 @@ public class Airport extends ComparableEntity {
 	@Version Number version;
 
 	@CreatedBy private String createdBy;
+	@Expiration private long expiration;
 
 	@PersistenceConstructor
 	public Airport(String id, String iata, String icao) {
@@ -61,6 +63,10 @@ public class Airport extends ComparableEntity {
 		return icao;
 	}
 
+	public long getExpiration() {
+		return expiration;
+	}
+
 	public Airport withId(String id) {
 		return new Airport(id, this.iata, this.icao);
 	}

src/test/java/org/springframework/data/couchbase/domain/User.java

@@ -42,8 +42,7 @@ public class User extends ComparableEntity {
 	@Id private String id;
 	private String firstname;
 	private String lastname;
-	@Transient
-	private String transientInfo;
+	@Transient private String transientInfo;
 	@CreatedBy private String createdBy;
 	@CreatedDate private long createdDate;
 	@LastModifiedBy private String lastModifiedBy;
@@ -97,9 +96,10 @@ public class User extends ComparableEntity {
 		return Objects.hash(id, firstname, lastname);
 	}
 
-	public String getTransientInfo(){
+	public String getTransientInfo() {
 		return transientInfo;
 	}
+
 	public void setTransientInfo(String something) {
 		transientInfo = something;
 	}

src/test/java/org/springframework/data/couchbase/repository/CouchbaseRepositoryQueryIntegrationTests.java

@@ -20,6 +20,7 @@ import static java.util.Arrays.asList;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertThrows;
@@ -38,6 +39,7 @@ import java.util.concurrent.Future;
 import java.util.Optional;
 import java.util.stream.Collectors;
 
+import com.couchbase.client.java.kv.UpsertOptions;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -376,6 +378,15 @@ public class CouchbaseRepositoryQueryIntegrationTests extends ClusterAwareIntegr
 		userRepository.delete(user);
 	}
 
+	@Test
+	public void testExpiration() {
+		Airport airport = new Airport("1", "iata21", "icao21");
+		airportRepository.withOptions(UpsertOptions.upsertOptions().expiry(Duration.ofSeconds(10))).save(airport);
+		Airport foundAirport = airportRepository.findByIata(airport.getIata());
+		assertNotEquals(0, foundAirport.getExpiration());
+		airportRepository.delete(airport);
+	}
+
 	@Test
 	public void testStreamQuery() {
 		User user1 = new User("1", "Dave", "Wilson");