Is this not the same as: java.util.function.IntUnaryOperator
On Mon, 10 Jul 2023 at 12:56, <ggreg...@apache.org> wrote: > > 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)); > + } > +} > --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
