Remove NodeMapper in favour of a DynamicNodeMapper

1 files changed, 11 insertions, 0 deletions

diff --git a/src/main/java/org/zwobble/couscous/util/ExtraIterables.java b/src/main/java/org/zwobble/couscous/util/ExtraIterables.java
index d8635c9..1140462 100644
--- a/src/main/java/org/zwobble/couscous/util/ExtraIterables.java
+++ b/src/main/java/org/zwobble/couscous/util/ExtraIterables.java
@@ -4,8 +4,10 @@ import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Iterables;
 
 import java.util.Iterator;
+import java.util.Optional;
 import java.util.function.BiFunction;
 import java.util.function.Function;
+import java.util.function.Predicate;
 import java.util.function.Supplier;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
@@ -96,6 +98,15 @@ public class ExtraIterables {
         };
     }
 
+    public static <T> Optional<T> find(Iterable<T> iterable, Predicate<T> predicate) {
+        for (T element : iterable) {
+            if (predicate.test(element)) {
+                return Optional.of(element);
+            }
+        }
+        return Optional.empty();
+    }
+
     public static <T, R> Iterable<R> lazyMap(Iterable<T> iterable, Function<T, R> function) {
         return new Iterable<R>() {
             @Override