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Posted to commits@isis.apache.org by ah...@apache.org on 2018/02/24 22:34:01 UTC
[isis] 02/07: ISIS-1880 Internal API: null-safe getOrDefault on maps
This is an automated email from the ASF dual-hosted git repository.
ahuber pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/isis.git
commit 53f7e3708fd2e3c9fa7cb8037392172fe0c29a8e
Author: Andi Huber <ah...@apache.org>
AuthorDate: Sat Feb 24 23:22:34 2018 +0100
ISIS-1880 Internal API: null-safe getOrDefault on maps
---
.../org/apache/isis/applib/internal/base/_NullSafe.java | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/core/applib/src/main/java/org/apache/isis/applib/internal/base/_NullSafe.java b/core/applib/src/main/java/org/apache/isis/applib/internal/base/_NullSafe.java
index 2e54f97..08cfef1 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/internal/base/_NullSafe.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/internal/base/_NullSafe.java
@@ -162,6 +162,20 @@ public final class _NullSafe {
public static boolean isEmpty(short[] array){ return array==null || array.length == 0;}
public static <T> boolean isEmpty(T[] array){ return array==null || array.length == 0;}
+ // -- MAP
+ /**
+ * Null-safe variant of {@link java.util.Map#getOrDefault(Object, Object)}
+ * @param map
+ * @param key
+ * @param defaultValue
+ * @return
+ */
+ public final static <K,V> V getOrDefault(final Map<K, V> map, final K key, final V defaultValue) {
+ if(map==null || key==null) {
+ return defaultValue;
+ }
+ return map.getOrDefault(key, defaultValue);
+ }
}
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