This is an automated email from the ASF dual-hosted git repository.
ggregory pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/commons-lang.git
commit 120d3489aad924e310a8071a66139947ace7a685
Author: Gary Gregory <garydgreg...@gmail.com>
AuthorDate: Mon Jul 10 07:56:18 2023 -0400
Add IntToIntFunction
---
src/changes/changes.xml | 1 +
.../commons/lang3/function/IntToIntFunction.java | 52 ++++++++++++++++++++++
.../lang3/function/IntToIntFunctionTest.java | 40 +++++++++++++++++
3 files changed, 93 insertions(+)
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index b9930b0d2..a9d493949 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -216,6 +216,7 @@ The <action> type attribute can be add,update,fix,remove.
<action issue="LANG-1647" type="add" dev="ggregory" due-to="Arturo Bernal,
Dimitrios Efthymiou, Gary Gregory">Add and ExceptionUtils.isChecked() and
isUnchecked() #1069</action>
<action type="add" dev="ggregory" due-to="Gary
Gregory">Add and use ExceptionUtils.throwUnchecked(throwable).</action>
<action type="add" dev="ggregory" due-to="Gary
Gregory">Add LockingVisitors.create(O, ReadWriteLock).</action>
+ <action type="add" dev="ggregory" due-to="Gary
Gregory">Add IntToIntFunction.</action>
<!-- UPDATE -->
<action type="update" dev="ggregory" due-to="Dependabot,
XenoAmess, Gary Gregory">Bump actions/cache from 2.1.4 to 3.0.10 #742, #752,
#764, #833, #867, #959, #964.</action>
<action type="update" dev="ggregory" due-to="Dependabot,
Gary Gregory">Bump actions/checkout from 2 to 3.1.0 #819, #825, #859,
#963.</action>
diff --git
a/src/main/java/org/apache/commons/lang3/function/IntToIntFunction.java
b/src/main/java/org/apache/commons/lang3/function/IntToIntFunction.java
new file mode 100644
index 000000000..45f309743
--- /dev/null
+++ b/src/main/java/org/apache/commons/lang3/function/IntToIntFunction.java
@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.lang3.function;
+
+import java.util.function.Function;
+
+/**
+ * Represents a function that accepts an int-valued argument and produces an
int-valued result. This is the {@code int}-to-{@code int} primitive
specialization
+ * for {@link Function}.
+ *
+ * <p>
+ * This is a <a href="package-summary.html">functional interface</a> whose
functional method is {@link #applyAsInt(int)}.
+ * </p>
+ *
+ * @see Function
+ * @since 3.13.0
+ */
+@FunctionalInterface
+public interface IntToIntFunction {
+
+ /**
+ * Returns a function that always returns its input argument.
+ *
+ * @return a function that always returns its input argument
+ */
+ static IntToIntFunction identity() {
+ return i -> i;
+ }
+
+ /**
+ * Applies this function to the given argument.
+ *
+ * @param value the function argument
+ * @return the function result
+ */
+ int applyAsInt(int value);
+}
diff --git
a/src/test/java/org/apache/commons/lang3/function/IntToIntFunctionTest.java
b/src/test/java/org/apache/commons/lang3/function/IntToIntFunctionTest.java
new file mode 100644
index 000000000..d8d11ae07
--- /dev/null
+++ b/src/test/java/org/apache/commons/lang3/function/IntToIntFunctionTest.java
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.lang3.function;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.apache.commons.lang3.AbstractLangTest;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Tests {@link IntToIntFunction}.
+ */
+public class IntToIntFunctionTest extends AbstractLangTest {
+
+ @Test
+ public void testApply() {
+ final IntToIntFunction func = i -> i + 1;
+ assertEquals(66, func.applyAsInt(65));
+ }
+
+ @Test
+ public void testIdentity() {
+ assertEquals(65, IntToIntFunction.identity().applyAsInt(65));
+ }
+}
