diff --git a/src/main/java/org/cactoos/text/Mapped.java b/src/main/java/org/cactoos/text/Mapped.java new file mode 100644 index 0000000000..24a2f92904 --- /dev/null +++ b/src/main/java/org/cactoos/text/Mapped.java @@ -0,0 +1,62 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2017-2020 Yegor Bugayenko + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +package org.cactoos.text; + +import org.cactoos.Func; +import org.cactoos.Text; + +/** + * Mapped text. + * + * @since 0.47 + */ +public final class Mapped implements Text { + + /** + * Map function. + */ + private final Func func; + + /** + * Original text. + */ + private final Text text; + + /** + * Ctor. + * + * @param fnc Function to apply + * @param txt Original text + */ + public Mapped(final Func fnc, final Text txt) { + this.func = fnc; + this.text = txt; + } + + @Override + public String asString() throws Exception { + return this.func.apply(this.text.asString()); + } + +} diff --git a/src/test/java/org/cactoos/text/MappedTest.java b/src/test/java/org/cactoos/text/MappedTest.java new file mode 100644 index 0000000000..4be4e98f6a --- /dev/null +++ b/src/test/java/org/cactoos/text/MappedTest.java @@ -0,0 +1,61 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2017-2020 Yegor Bugayenko + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +package org.cactoos.text; + +import org.junit.jupiter.api.Test; +import org.llorllale.cactoos.matchers.Assertion; +import org.llorllale.cactoos.matchers.TextHasString; + +/** + * Tests for @{link Mapped}. + * + * @since 0.47 + */ +final class MappedTest { + + @Test + void mapsWithFormat() { + new Assertion<>( + "must apply lambda to a string", + new Mapped( + s -> String.format("<%s>", s), + new TextOf("hi") + ), + new TextHasString("") + ).affirm(); + } + + @Test + void maps() { + new Assertion<>( + "must apply mehtod reference to a string", + new Mapped( + String::toLowerCase, + new TextOf("ABC") + ), + new TextHasString("abc") + ).affirm(); + } + +}