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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| /* | ||
| * Copyright Terracotta, Inc. | ||
| * | ||
| * Licensed 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.ehcache.jsr107; | ||
|
|
||
| import java.io.Closeable; | ||
| import java.io.IOException; | ||
| import java.util.Arrays; | ||
| import java.util.Collection; | ||
| import java.util.Optional; | ||
| import java.util.stream.Stream; | ||
|
|
||
| public class CloseUtil { | ||
| public static <T extends Throwable> T closeAllAfter(T failure, Object ... objects) { | ||
| Optional<Closeable> closeable = extractCloseables(Stream.of(objects)).reduce(CloseUtil::composeCloseables); | ||
| if (closeable.isPresent()) { | ||
| try { | ||
| closeable.get().close(); | ||
| } catch (Throwable t) { | ||
| failure.addSuppressed(t); | ||
| } | ||
| } | ||
| return failure; | ||
| } | ||
|
|
||
| static void closeAll(Object ... objects) throws IOException { | ||
| closeAll(Stream.of(objects)); | ||
| } | ||
|
|
||
| static void closeAll(Stream<Object> objects) throws IOException { | ||
| chain(extractCloseables(objects)); | ||
| } | ||
|
|
||
| static void chain(Closeable ... objects) throws IOException { | ||
| chain(Stream.of(objects)); | ||
| } | ||
|
|
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| public static void chain(Stream<Closeable> objects) throws IOException { | ||
| Optional<Closeable> closeable = objects.reduce(CloseUtil::composeCloseables); | ||
| if (closeable.isPresent()) { | ||
| closeable.get().close(); | ||
| } | ||
| } | ||
|
|
||
| private static Stream<Closeable> extractCloseables(Stream<Object> objects) { | ||
| return objects.filter(o -> o != null).flatMap(o -> { | ||
| if (o instanceof Collection<?>) { | ||
| return ((Collection<?>) o).stream(); | ||
| } else if (o.getClass().isArray()) { | ||
| return Arrays.stream((Object[]) o); | ||
| } else { | ||
| return Stream.of(o); | ||
| } | ||
| }).filter(o -> o != null).filter(Closeable.class::isInstance).map(Closeable.class::cast); | ||
| } | ||
|
|
||
| private static Closeable composeCloseables(Closeable a, Closeable b) { | ||
| return () -> { | ||
| try { | ||
| a.close(); | ||
| } catch (Throwable t1) { | ||
| try { | ||
| b.close(); | ||
| } catch (Throwable t2) { | ||
| t1.addSuppressed(t2); | ||
| } | ||
| throw t1; | ||
| } | ||
| b.close(); | ||
| }; | ||
| } | ||
|
|
||
| } |
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