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Streams.java
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39 lines (35 loc) · 1.46 KB
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/*
* 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.
*
* Copyright 2012-2019 the original author or authors.
*/
package org.assertj.core.util;
import java.util.Collection;
import java.util.Iterator;
import java.util.Spliterators;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
public class Streams {
/**
* Returns a sequential {@link Stream} of the contents of {@code iterable}, delegating to {@link
* Collection#stream} if possible.
* @param <T> the stream type
* @param iterable the iterable to built the stream from
* @return the stream built from the given {@link Iterable}
*/
public static <T> Stream<T> stream(Iterable<T> iterable) {
return (iterable instanceof Collection)
? ((Collection<T>) iterable).stream()
: StreamSupport.stream(iterable.spliterator(), false);
}
public static <T> Stream<T> stream(Iterator<T> iterator) {
return StreamSupport.stream(Spliterators.spliteratorUnknownSize(iterator, 0), false);
}
}