Create internal package

1 files changed, 32 insertions, 0 deletions

diff --git a/src/main/java/org/zwobble/mammoth/internal/util/MammothMaps.java b/src/main/java/org/zwobble/mammoth/internal/util/MammothMaps.java
new file mode 100644
index 0000000..912a454
--- /dev/null
+++ b/src/main/java/org/zwobble/mammoth/internal/util/MammothMaps.java
@@ -0,0 +1,32 @@
+package org.zwobble.mammoth.internal.util;
+
+import com.google.common.collect.ImmutableMap;
+
+import java.util.Map;
+import java.util.function.Function;
+
+public class MammothMaps {
+    public static <K, V> Map<K, V> map() {
+        return ImmutableMap.of();
+    }
+
+    public static <K, V> Map<K, V> map(K key1, V value1) {
+        return ImmutableMap.of(key1, value1);
+    }
+
+    public static <K, V> Map<K, V> map(K key1, V value1, K key2, V value2) {
+        return ImmutableMap.of(key1, value1, key2, value2);
+    }
+
+    public static <K, V> Map<K, V> map(K key1, V value1, K key2, V value2, K key3, V value3) {
+        return ImmutableMap.of(key1, value1, key2, value2, key3, value3);
+    }
+
+    public static <T, K, V> Map<K, V> toMap(Iterable<T> iterable, Function<T, Map.Entry<K, V>> function) {
+        ImmutableMap.Builder<K, V> builder = ImmutableMap.builder();
+        for (T element : iterable) {
+            builder.put(function.apply(element));
+        }
+        return builder.build();
+    }
+}