issue #146: ArangoCollection/ArangoDatabase.exists()

Author: mpv1989

src/main/java/com/arangodb/ArangoCollection.java

@@ -782,15 +782,12 @@ public Collection<IndexEntity> getIndexes() throws ArangoDBException {
 	 * @return true if the collection exists, otherwise false
 	 */
 	public boolean exists() throws ArangoDBException {
-		boolean exists = false;
-		final Collection<CollectionEntity> collections = db().getCollections();
-		for (final CollectionEntity collection : collections) {
-			if (collection.getName().equals(name())) {
-				exists = true;
-				break;
-			}
+		try {
+			getInfo();
+			return true;
+		} catch (final ArangoDBException e) {
+			return false;
 		}
-		return exists;
 	}
 
 	/**

src/main/java/com/arangodb/ArangoDatabase.java

@@ -96,7 +96,12 @@ public ArangoDBVersion getVersion() throws ArangoDBException {
 	 * @return true if the database exists, otherwise false
 	 */
 	public boolean exists() throws ArangoDBException {
-		return arango().getDatabases().contains(name());
+		try {
+			getInfo();
+			return true;
+		} catch (final ArangoDBException e) {
+			return false;
+		}
 	}
 
 	/**