From 86ad50b4df6166c6f99b08d91d49fe59ee754619 Mon Sep 17 00:00:00 2001
From: Ben Culkin <scorpress@gmail.com>
Date: Sat, 21 Nov 2020 22:53:56 -0500
Subject: Change IMap to use Optional, not exceptions

IMap now returns optionals, instead of throwing an exception
---
 src/main/java/bjc/funcdata/TransformedValueMap.java | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'src/main/java/bjc/funcdata/TransformedValueMap.java')

diff --git a/src/main/java/bjc/funcdata/TransformedValueMap.java b/src/main/java/bjc/funcdata/TransformedValueMap.java
index cf4a9d8..1e0ef51 100644
--- a/src/main/java/bjc/funcdata/TransformedValueMap.java
+++ b/src/main/java/bjc/funcdata/TransformedValueMap.java
@@ -1,5 +1,6 @@
 package bjc.funcdata;
 
+import java.util.*;
 import java.util.function.*;
 
 /**
@@ -62,8 +63,8 @@ final class TransformedValueMap<OldKey, OldValue, NewValue>
 	}
 
 	@Override
-	public NewValue get(final OldKey key) {
-		return transformer.apply(backing.get(key));
+	public Optional<NewValue> get(final OldKey key) {
+		return backing.get(key).map(transformer);
 	}
 
 	@Override
-- 
cgit v1.2.3