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52 changes: 52 additions & 0 deletions
52
src/main/java/com/apptasticsoftware/rssreader/internal/StreamUtil.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| /* | ||
| * MIT License | ||
| * | ||
| * Copyright (c) 2024, Apptastic Software | ||
| * | ||
| * 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 NONINFRINGEMENT. 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 com.apptasticsoftware.rssreader.internal; | ||
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| import java.util.Iterator; | ||
| import java.util.Spliterator; | ||
| import java.util.Spliterators; | ||
| import java.util.stream.Stream; | ||
| import java.util.stream.StreamSupport; | ||
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| import static java.util.Objects.requireNonNull; | ||
|
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| /** | ||
| * Internal utility class for working with streams. | ||
| */ | ||
| public class StreamUtil { | ||
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| private StreamUtil() { } | ||
|
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| /** | ||
| * Creates a Stream from an Iterator. | ||
| * | ||
| * @param iterator The Iterator to create the Stream from. | ||
| * @param <T> The type of the elements in the Stream. | ||
| * @return A Stream created from the Iterator. | ||
| */ | ||
| public static <T> Stream<T> asStream(Iterator<T> iterator) { | ||
| requireNonNull(iterator); | ||
| return StreamSupport.stream(Spliterators.spliteratorUnknownSize(iterator, Spliterator.ORDERED), false); | ||
| } | ||
| } |
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src/main/java/com/apptasticsoftware/rssreader/internal/stream/AbstractAutoCloseStream.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| /* | ||
| * MIT License | ||
| * | ||
| * Copyright (c) 2024, Apptastic Software | ||
| * | ||
| * 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 NONINFRINGEMENT. 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 com.apptasticsoftware.rssreader.internal.stream; | ||
|
|
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| import java.util.Objects; | ||
| import java.util.concurrent.atomic.AtomicBoolean; | ||
| import java.util.function.*; | ||
| import java.util.stream.*; | ||
|
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| public class AbstractAutoCloseStream<T, S extends BaseStream<T, S>> implements AutoCloseable { | ||
| private final S stream; | ||
| private final AtomicBoolean isClosed; | ||
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| AbstractAutoCloseStream(S stream) { | ||
| this.stream = Objects.requireNonNull(stream); | ||
| this.isClosed = new AtomicBoolean(); | ||
| } | ||
|
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| protected S stream() { | ||
| return stream; | ||
| } | ||
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| @Override | ||
| public void close() { | ||
| if (isClosed.compareAndSet(false,true)) { | ||
| stream().close(); | ||
| } | ||
| } | ||
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| <R> R autoClose(Function<S, R> function) { | ||
| try (S s = stream()) { | ||
| return function.apply(s); | ||
| } | ||
| } | ||
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| <U> Stream<U> asAutoCloseStream(Stream<U> stream) { | ||
| return asAutoCloseStream(stream, AutoCloseStream::new); | ||
| } | ||
|
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| IntStream asAutoCloseStream(IntStream stream) { | ||
| return asAutoCloseStream(stream, AutoCloseIntStream::new); | ||
| } | ||
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| LongStream asAutoCloseStream(LongStream stream) { | ||
| return asAutoCloseStream(stream, AutoCloseLongStream::new); | ||
| } | ||
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| DoubleStream asAutoCloseStream(DoubleStream stream) { | ||
| return asAutoCloseStream(stream, AutoCloseDoubleStream::new); | ||
| } | ||
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| private <U> U asAutoCloseStream(U stream, Function<U, U> wrapper) { | ||
| if (stream instanceof AbstractAutoCloseStream) { | ||
| return stream; | ||
| } | ||
| return wrapper.apply(stream); | ||
| } | ||
|
|
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| } |
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