add Long parsing to Map helper

datastructures-common/src/main/java/org/xbib/datastructures/common/Maps.java

@@ -6,9 +6,6 @@ import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 
-/**
- *
- */
 public class Maps {
 
     private Maps() {
@@ -55,6 +52,19 @@ public class Maps {
         return (String) object;
     }
 
+    public static Long getLong(Map<?, ?> map, String key, Long defaultValue) {
+        if (map.containsKey(key)) {
+            try {
+                Object o = get(map, key);
+                return o == null ? null : o instanceof Long ? (Long) o : Long.parseLong(o.toString());
+            } catch (NumberFormatException e) {
+                return defaultValue;
+            }
+        } else {
+            return defaultValue;
+        }
+    }
+
     public static Integer getInteger(Map<?, ?> map, String key, Integer defaultValue) {
         if (map.containsKey(key)) {
             try {

gradle.properties

@@ -1,5 +1,5 @@
 group = org.xbib
 name = datastructures
-version = 2.3.0
+version = 2.3.1
 
 org.gradle.warning.mode = all