[java-support] 06/26: Add Function to BiFunction adapters.

[Scott Cantor]

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scantor pushed a commit to branch dev/JSPT-111
in repository java-support.

View the commit online:
http://git.shibboleth.net/view/?p=java-support.git;a=commit;h=d5d13a17f0c6a6467cde1c64eed4167e8f0471ea

commit d5d13a17f0c6a6467cde1c64eed4167e8f0471ea
Author: Scott Cantor <cantor.2 at osu.edu>
AuthorDate: Mon Jan 24 10:59:45 2022 -0500

    Add Function to BiFunction adapters.
---
 .../java/support/logic/BiFunctionSupport.java      | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/src/main/java/net/shibboleth/utilities/java/support/logic/BiFunctionSupport.java b/src/main/java/net/shibboleth/utilities/java/support/logic/BiFunctionSupport.java
index 33b7fa1..a5aecae 100644
--- a/src/main/java/net/shibboleth/utilities/java/support/logic/BiFunctionSupport.java
+++ b/src/main/java/net/shibboleth/utilities/java/support/logic/BiFunctionSupport.java
@@ -88,4 +88,34 @@ public final class BiFunctionSupport {
         return predicate::test;
     }
     
+    /**
+     * Adapts a {@link Function} into a {BiFunction} that ignores the second argument.
+     * 
+     * @param <A> input type of function
+     * @param <B> ignored argument type
+     * @param <C> return type
+     * @param function the function to apply
+     * 
+     * @return the adapted object
+     */
+    @Nonnull public static <A,B,C> BiFunction<A,B,C> forFunctionOfFirstArg(
+            @Nonnull @ParameterName(name="function") final Function<? super A,? extends C> function) {
+        return (a,b) -> function.apply(a);
+    }
+
+    /**
+     * Adapts a {@link Function} into a {BiFunction} that ignores the first argument.
+     * 
+     * @param <A> ignored argument type
+     * @param <B> input type of function
+     * @param <C> return type
+     * @param function the function to apply
+     * 
+     * @return the adapted object
+     */
+    @Nonnull public static <A,B,C> BiFunction<A,B,C> forFunctionOfSecondArg(
+            @Nonnull @ParameterName(name="function") final Function<? super B,? extends C> function) {
+        return (a,b) -> function.apply(b);
+    }
+
 }
\ No newline at end of file

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