Bugfix: avoid null pointer exceptions on DownloadDao due to 'result' being null.

Author: MarcFraile

src/main/java/cloudgene/mapred/database/dao/DownloadDao.java

@@ -86,7 +86,8 @@ public Download findByHash(String hash) {
 
 		try {
 			Download result = queryForObject(sql, params, new DownloadMapper());
-			log.debug("find download by hash {} successful. name: {}", hash, result.getName());
+			log.debug("find download by hash {} successful. result: {}",
+					hash, (result == null) ? null : result.getName());
 			return result;
 		} catch (SQLException e) {
 			log.error("find download by hash {} failed.", hash, e);
@@ -102,7 +103,8 @@ public Download findByJobAndPath(String job, String path) {
 
 		try {
 			Download result = queryForObject(sql, params, new DownloadMapper());
-			log.debug("find download by job {} and path {} successful. name: {}", job, path, result.getName());
+			log.debug("find download by job {} and path {} successful. result: {}",
+					job, path, (result == null) ? null : result.getName());
 			return result;
 		} catch (SQLException e) {
 			log.error("find download by job {} and path {} failed.", job, path, e);
@@ -119,8 +121,8 @@ public Download findByParameterAndName(CloudgeneParameterOutput param, String fi
 
 		try {
 			Download result = queryForObject(sql, params, new DownloadMapper());
-			log.debug("find download by param {} and filename {} successful. name: {}",
-					param.getId(), filename, result.getName());
+			log.debug("find download by param {} and filename {} successful. result: {}",
+					param.getId(), filename, (result == null) ? null : result.getName());
 			return result;
 		} catch (SQLException e) {
 			log.error("find download by param {} and filename {} failed.", param.getId(), filename, e);

src/test/java/cloudgene/mapred/api/v2/jobs/DownloadResultsTest.java

@@ -24,7 +24,7 @@ public class DownloadResultsTest {
 	CloudgeneClientRestAssured client;
 
 	@Test
-	public void testDownloadSingleFile() throws InterruptedException {
+	public void testDownloadSingleFile() {
 		Header accessToken = client.loginAsPublicUser();
 
 		// submit job
@@ -87,7 +87,7 @@ public void testDownloadSingleFile() throws InterruptedException {
 	}
 
 	@Test
-	public void testDownloadSingleFolder() throws InterruptedException {
+	public void testDownloadSingleFolder() {
 		Header accessToken = client.loginAsPublicUser();
 
 		// submit job
@@ -138,7 +138,7 @@ public void testDownloadSingleFolder() throws InterruptedException {
 	}
 
 	@Test
-	public void testDownloadCounter() throws InterruptedException {
+	public void testDownloadCounter() {
 		Header accessToken = client.loginAsPublicUser();
 
 		// submit job