Auto-expanding maps of maps of collections.

rapidoid · Jun 4, 2016 · a1efde2 · a1efde2
1 parent aaf9348
commit a1efde2
Showing 1 changed file with 35 additions and 0 deletions.
diff --git a/rapidoid-commons/src/main/java/org/rapidoid/commons/Coll.java b/rapidoid-commons/src/main/java/org/rapidoid/commons/Coll.java
@@ -264,9 +264,21 @@ public Map<K2, V> map(K1 src) throws Exception {
 		});
 	}
 
+	public static <K1, K2, K3, V> Map<K1, Map<K2, Map<K3, V>>> mapOfMapOfMaps() {
+		return autoExpandingMap(new Mapper<K1, Map<K2, Map<K3, V>>>() {
+
+			@Override
+			public Map<K2, Map<K3, V>> map(K1 src) throws Exception {
+				return mapOfMaps();
+			}
+
+		});
+	}
+
 	public static <K, V> Map<K, List<V>> mapOfLists() {
 		return autoExpandingMap(new Mapper<K, List<V>>() {
 
+			@SuppressWarnings("unchecked")
 			@Override
 			public List<V> map(K src) throws Exception {
 				return synchronizedList();
@@ -275,9 +287,21 @@ public List<V> map(K src) throws Exception {
 		});
 	}
 
+	public static <K1, K2, V> Map<K1, Map<K2, List<V>>> mapOfMapOfLists() {
+		return autoExpandingMap(new Mapper<K1, Map<K2, List<V>>>() {
+
+			@Override
+			public Map<K2, List<V>> map(K1 src) throws Exception {
+				return mapOfLists();
+			}
+
+		});
+	}
+
 	public static <K, V> Map<K, Set<V>> mapOfSets() {
 		return autoExpandingMap(new Mapper<K, Set<V>>() {
 
+			@SuppressWarnings("unchecked")
 			@Override
 			public Set<V> map(K src) throws Exception {
 				return synchronizedSet();
@@ -286,6 +310,17 @@ public Set<V> map(K src) throws Exception {
 		});
 	}
 
+	public static <K1, K2, V> Map<K1, Map<K2, Set<V>>> mapOfMapOfSets() {
+		return autoExpandingMap(new Mapper<K1, Map<K2, Set<V>>>() {
+
+			@Override
+			public Map<K2, Set<V>> map(K1 src) throws Exception {
+				return mapOfSets();
+			}
+
+		});
+	}
+
 	public static <T> List<T> range(Iterable<T> items, int from, int to) {
 		U.must(from <= to, "'from' must be <= 'to'!");