:trollface: 增强EasyStream#zip对并行流的支持,提供CollectorUtil.entryToMap对Entry转map提供支持,完善javadoc

This commit is contained in:
VampireAchao 2022-09-09 14:38:28 +08:00
parent b7d924b34d
commit 492a281cf9
4 changed files with 252 additions and 250 deletions

View File

@ -134,7 +134,7 @@ public class CollectorUtil {
* @return {@link Collector}
*/
public static <T, K, A, D> Collector<T, ?, Map<K, D>> groupingBy(final Function<? super T, ? extends K> classifier,
final Collector<? super T, A, D> downstream) {
final Collector<? super T, A, D> downstream) {
return groupingBy(classifier, HashMap::new, downstream);
}
@ -273,14 +273,14 @@ public class CollectorUtil {
/**
* 将流转为{@link EntryStream}
*
* @param keyMapper 键的映射方法
* @param <T> 输入元素类型
* @param <K> 元素的键类型
* @param keyMapper 键的映射方法
* @param <T> 输入元素类型
* @param <K> 元素的键类型
* @return 收集器
* @since 6.0.0
*/
public static <T, K> Collector<T, List<T>, EntryStream<K, T>> toEntryStream(
Function<? super T, ? extends K> keyMapper) {
Function<? super T, ? extends K> keyMapper) {
return toEntryStream(keyMapper, Function.identity());
}
@ -361,4 +361,14 @@ public class CollectorUtil {
return transform(ArrayList::new, mapper);
}
/**
* 用于{@code Stream<Entry>} Map 的情况
*
* @param <K> key类型
* @param <V> value类型
* @return map
*/
public static <K, V> Collector<Map.Entry<K, V>, ?, Map<K, V>> entryToMap() {
return toMap(Map.Entry::getKey, Map.Entry::getValue);
}
}

View File

@ -17,52 +17,52 @@ import java.util.stream.Stream;
*
* @param <T> 流中的元素类型
* @param <S> {@link TerminableWrappedStream}的实现类类型
* @author huangchengxing
* @author huangchengxing VampireAchao
* @since 6.0.0
*/
public interface TerminableWrappedStream<T, S extends TerminableWrappedStream<T, S>> extends WrappedStream<T, S> {
// region ============ to collection ============
// region ============ to collection ============
/**
* 转换为{@link ArrayList}
*
* @return 集合
* @see #toColl(Supplier)
*/
default List<T> toList() {
return this.toColl(ArrayList::new);
}
/**
* 换为不可变集合
*
* @return 集合
/**
* 转换为{@link ArrayList}
*
* @return 集合
* @see #toColl(Supplier)
*/
default List<T> toUnmodifiableList() {
return Collections.unmodifiableList(this.toList());
}
default List<T> toList() {
return this.toColl(ArrayList::new);
}
/**
* 转换为HashSet
*
* @return 集合
/**
* 换为不可变集合
*
* @return 集合
* @see #toColl(Supplier)
*/
default Set<T> toSet() {
return this.toColl(HashSet::new);
}
default List<T> toUnmodifiableList() {
return Collections.unmodifiableList(this.toList());
}
/**
* 换为不可变集合
*
* @return 集合
/**
* 转换为HashSet
*
* @return 集合
* @see #toColl(Supplier)
*/
default Set<T> toUnmodifiableSet() {
return Collections.unmodifiableSet(this.toSet());
}
default Set<T> toSet() {
return this.toColl(HashSet::new);
}
/**
* 换为不可变集合
*
* @return 集合
* @see #toColl(Supplier)
*/
default Set<T> toUnmodifiableSet() {
return Collections.unmodifiableSet(this.toSet());
}
/**
* 转换成集合
@ -76,145 +76,145 @@ public interface TerminableWrappedStream<T, S extends TerminableWrappedStream<T,
return unwrap().collect(Collectors.toCollection(collectionFactory));
}
// endregion
// endregion
// region ============ to map ============
// region ============ to map ============
/**
* 转换为mapkey为给定操作执行后的返回值,value为当前元素
*
* @param keyMapper 指定的key操作
* @param <K> key类型
* @return map
/**
* 转换为mapkey为给定操作执行后的返回值,value为当前元素
*
* @param keyMapper 指定的key操作
* @param <K> key类型
* @return map
* @see #toMap(Function, Function, BinaryOperator, Supplier)
*/
default <K> Map<K, T> toMap(final Function<? super T, ? extends K> keyMapper) {
return this.toMap(keyMapper, Function.identity());
}
*/
default <K> Map<K, T> toMap(final Function<? super T, ? extends K> keyMapper) {
return this.toMap(keyMapper, Function.identity());
}
/**
* 转换为mapkey,value为给定操作执行后的返回值
*
* @param keyMapper 指定的key操作
* @param valueMapper 指定value操作
* @param <K> key类型
* @param <U> value类型
* @return map
/**
* 转换为mapkey,value为给定操作执行后的返回值
*
* @param keyMapper 指定的key操作
* @param valueMapper 指定value操作
* @param <K> key类型
* @param <U> value类型
* @return map
* @see #toMap(Function, Function, BinaryOperator, Supplier)
*/
default <K, U> Map<K, U> toMap(
final Function<? super T, ? extends K> keyMapper, final Function<? super T, ? extends U> valueMapper) {
return this.toMap(keyMapper, valueMapper, (l, r) -> r);
}
*/
default <K, U> Map<K, U> toMap(
final Function<? super T, ? extends K> keyMapper, final Function<? super T, ? extends U> valueMapper) {
return this.toMap(keyMapper, valueMapper, (l, r) -> r);
}
/**
* 转换为不可变mapkey,value为给定操作执行后的返回值
*
* @param keyMapper 指定的key操作
* @param valueMapper 指定value操作
* @param <K> key类型
* @param <U> value类型
* @return map
/**
* 转换为不可变mapkey,value为给定操作执行后的返回值
*
* @param keyMapper 指定的key操作
* @param valueMapper 指定value操作
* @param <K> key类型
* @param <U> value类型
* @return map
* @see #toMap(Function, Function, BinaryOperator, Supplier)
*/
default <K, U> Map<K, U> toUnmodifiableMap(
final Function<? super T, ? extends K> keyMapper, final Function<? super T, ? extends U> valueMapper) {
return Collections.unmodifiableMap(this.toMap(keyMapper, valueMapper));
}
*/
default <K, U> Map<K, U> toUnmodifiableMap(
final Function<? super T, ? extends K> keyMapper, final Function<? super T, ? extends U> valueMapper) {
return Collections.unmodifiableMap(this.toMap(keyMapper, valueMapper));
}
/**
* 转换为mapkey,value为给定操作执行后的返回值
*
* @param keyMapper 指定的key操作
* @param valueMapper 指定value操作
* @param mergeFunction 合并操作
* @param <K> key类型
* @param <U> value类型
* @return map
/**
* 转换为mapkey,value为给定操作执行后的返回值
*
* @param keyMapper 指定的key操作
* @param valueMapper 指定value操作
* @param mergeFunction 合并操作
* @param <K> key类型
* @param <U> value类型
* @return map
* @see #toMap(Function, Function, BinaryOperator, Supplier)
*/
default <K, U> Map<K, U> toMap(
final Function<? super T, ? extends K> keyMapper,
final Function<? super T, ? extends U> valueMapper,
final BinaryOperator<U> mergeFunction) {
return this.toMap(keyMapper, valueMapper, mergeFunction, HashMap::new);
}
*/
default <K, U> Map<K, U> toMap(
final Function<? super T, ? extends K> keyMapper,
final Function<? super T, ? extends U> valueMapper,
final BinaryOperator<U> mergeFunction) {
return this.toMap(keyMapper, valueMapper, mergeFunction, HashMap::new);
}
/**
* 转换为不可变mapkey,value为给定操作执行后的返回值
*
* @param keyMapper 指定的key操作
* @param valueMapper 指定value操作
* @param mergeFunction 合并操作
* @param <K> key类型
* @param <U> value类型
* @return map
/**
* 转换为不可变mapkey,value为给定操作执行后的返回值
*
* @param keyMapper 指定的key操作
* @param valueMapper 指定value操作
* @param mergeFunction 合并操作
* @param <K> key类型
* @param <U> value类型
* @return map
* @see #toMap(Function, Function, BinaryOperator, Supplier)
*/
default <K, U> Map<K, U> toUnmodifiableMap(
final Function<? super T, ? extends K> keyMapper,
final Function<? super T, ? extends U> valueMapper,
final BinaryOperator<U> mergeFunction) {
return Collections.unmodifiableMap(
this.toMap(keyMapper, valueMapper, mergeFunction, HashMap::new)
*/
default <K, U> Map<K, U> toUnmodifiableMap(
final Function<? super T, ? extends K> keyMapper,
final Function<? super T, ? extends U> valueMapper,
final BinaryOperator<U> mergeFunction) {
return Collections.unmodifiableMap(
this.toMap(keyMapper, valueMapper, mergeFunction, HashMap::new)
);
}
}
/**
* 转换为mapkey,value为给定操作执行后的返回值
*
* @param keyMapper 指定的key操作
* @param valueMapper 指定value操作
* @param mergeFunction 合并操作
* @param mapSupplier map工厂
* @param <K> key类型
* @param <U> value类型
* @param <M> map类型
* @return map
*/
default <K, U, M extends Map<K, U>> M toMap(
final Function<? super T, ? extends K> keyMapper,
final Function<? super T, ? extends U> valueMapper,
final BinaryOperator<U> mergeFunction,
Supplier<M> mapSupplier) {
/**
* 转换为mapkey,value为给定操作执行后的返回值
*
* @param keyMapper 指定的key操作
* @param valueMapper 指定value操作
* @param mergeFunction 合并操作
* @param mapSupplier map工厂
* @param <K> key类型
* @param <U> value类型
* @param <M> map类型
* @return map
*/
default <K, U, M extends Map<K, U>> M toMap(
final Function<? super T, ? extends K> keyMapper,
final Function<? super T, ? extends U> valueMapper,
final BinaryOperator<U> mergeFunction,
Supplier<M> mapSupplier) {
Objects.requireNonNull(keyMapper);
Objects.requireNonNull(valueMapper);
Objects.requireNonNull(mergeFunction);
Objects.requireNonNull(mapSupplier);
return unwrap().collect(Collectors.toMap(keyMapper, valueMapper, mergeFunction, mapSupplier));
}
return unwrap().collect(Collectors.toMap(keyMapper, valueMapper, mergeFunction, mapSupplier));
}
// endregion
// endregion
// region ============ to zip ============
// region ============ to zip ============
/**
* 与给定的可迭代对象转换成mapkey为现有元素value为给定可迭代对象迭代的元素<br>
* 至少包含全部的key如果对应位置上的value不存在则为null
*
* @param other 可迭代对象
* @param <R> 可迭代对象迭代的元素类型
* @return mapkey为现有元素value为给定可迭代对象迭代的元素;<br>
* 至少包含全部的key如果对应位置上的value不存在则为null;<br>
* 如果key重复, 则保留最后一个关联的value;<br>
*/
default <R> Map<T, R> toZip(final Iterable<R> other) {
/**
* 与给定的可迭代对象转换成mapkey为现有元素value为给定可迭代对象迭代的元素<br>
* 至少包含全部的key如果对应位置上的value不存在则为null
*
* @param other 可迭代对象
* @param <R> 可迭代对象迭代的元素类型
* @return mapkey为现有元素value为给定可迭代对象迭代的元素;<br>
* 至少包含全部的key如果对应位置上的value不存在则为null;<br>
* 如果key重复, 则保留最后一个关联的value;<br>
*/
default <R> Map<T, R> toZip(final Iterable<R> other) {
Objects.requireNonNull(other);
// value对象迭代器
final Iterator<R> iterator = Opt.ofNullable(other).map(Iterable::iterator).orElseGet(Collections::emptyIterator);
if (this.isParallel()) {
// value对象迭代器
final Iterator<R> iterator = Opt.ofNullable(other).map(Iterable::iterator).orElseGet(Collections::emptyIterator);
if (this.isParallel()) {
final List<T> keyList = toList();
final Map<T, R> map = new HashMap<>(keyList.size());
for (T key : keyList) {
map.put(key, iterator.hasNext() ? iterator.next() : null);
}
return map;
} else {
return this.toMap(Function.identity(), e -> iterator.hasNext() ? iterator.next() : null);
}
}
final Map<T, R> map = new HashMap<>(keyList.size());
for (T key : keyList) {
map.put(key, iterator.hasNext() ? iterator.next() : null);
}
return map;
} else {
return this.toMap(Function.identity(), e -> iterator.hasNext() ? iterator.next() : null);
}
}
// endregion
// endregion
// region ============ to optional ============
@ -408,7 +408,7 @@ public interface TerminableWrappedStream<T, S extends TerminableWrappedStream<T,
* @see #group(Function, Supplier, Collector)
*/
default <K, A, D> Map<K, D> group(
final Function<? super T, ? extends K> classifier, final Collector<? super T, A, D> downstream) {
final Function<? super T, ? extends K> classifier, final Collector<? super T, A, D> downstream) {
return this.group(classifier, HashMap::new, downstream);
}
@ -426,9 +426,9 @@ public interface TerminableWrappedStream<T, S extends TerminableWrappedStream<T,
* @see CollectorUtil#groupingBy(Function, Supplier, Collector)
*/
default <K, D, A, M extends Map<K, D>> M group(
final Function<? super T, ? extends K> classifier,
final Supplier<M> mapFactory,
final Collector<? super T, A, D> downstream) {
final Function<? super T, ? extends K> classifier,
final Supplier<M> mapFactory,
final Collector<? super T, A, D> downstream) {
Objects.requireNonNull(classifier);
Objects.requireNonNull(mapFactory);
Objects.requireNonNull(downstream);
@ -449,8 +449,9 @@ public interface TerminableWrappedStream<T, S extends TerminableWrappedStream<T,
/**
* 根据给定判断条件分组
*
* @param predicate 判断条件
* @param predicate 判断条件
* @param collFactory 提供的集合
* @param <C> 集合类型
* @return map
* @see #partition(Predicate, Collector)
*/
@ -463,7 +464,7 @@ public interface TerminableWrappedStream<T, S extends TerminableWrappedStream<T,
*
* @param predicate 判断条件
* @param downstream 下游操作
* @param <R> 返回值类型
* @param <R> 返回值类型
* @return map
*/
default <R> Map<Boolean, R> partition(final Predicate<T> predicate, final Collector<T, ?, R> downstream) {

View File

@ -3,7 +3,6 @@ package cn.hutool.core.stream;
import cn.hutool.core.collection.ListUtil;
import cn.hutool.core.collection.iter.IterUtil;
import cn.hutool.core.lang.Console;
import cn.hutool.core.lang.Opt;
import cn.hutool.core.lang.mutable.MutableInt;
import cn.hutool.core.lang.mutable.MutableObj;
import cn.hutool.core.map.MapUtil;
@ -24,7 +23,7 @@ import java.util.stream.StreamSupport;
*
* @param <T> 流中的元素类型
* @param <S> {@link TransformableWrappedStream}的实现类类型
* @author huangchengxing
* @author huangchengxing VampireAchao
* @since 6.0.0
*/
public interface TransformableWrappedStream<T, S extends TransformableWrappedStream<T, S>> extends WrappedStream<T, S> {
@ -40,24 +39,15 @@ public interface TransformableWrappedStream<T, S extends TransformableWrappedStr
* @return 合并后的结果对象的流
*/
default <U, R> EasyStream<R> zip(
final Iterable<U> other,
final BiFunction<? super T, ? super U, ? extends R> zipper) {
final Iterable<U> other,
final BiFunction<? super T, ? super U, ? extends R> zipper) {
Objects.requireNonNull(zipper);
final Spliterator<T> keys = spliterator();
final Spliterator<U> values = Opt.ofNullable(other).map(Iterable::spliterator).orElseGet(Spliterators::emptySpliterator);
// 获取两个Spliterator的中较小的数量
// 如果Spliterator经过流操作, getExactSizeIfKnown()可能会返回-1, 所以默认大小为 ArrayList.DEFAULT_CAPACITY
final int sizeIfKnown = (int) Math.max(Math.min(keys.getExactSizeIfKnown(), values.getExactSizeIfKnown()), 10);
final List<R> list = new ArrayList<>(sizeIfKnown);
// 保存第一个Spliterator的值
final MutableObj<T> key = new MutableObj<>();
// 保存第二个Spliterator的值
final MutableObj<U> value = new MutableObj<>();
// 当两个Spliterator中都还有剩余元素时
while (keys.tryAdvance(key::set) && values.tryAdvance(value::set)) {
list.add(zipper.apply(key.get(), value.get()));
Map<Integer, T> idxIdentityMap = mapIdx((e, idx) -> MapUtil.entry(idx, e)).collect(CollectorUtil.entryToMap());
Map<Integer, U> idxOtherMap = EasyStream.of(other).mapIdx((e, idx) -> MapUtil.entry(idx, e)).collect(CollectorUtil.entryToMap());
if (idxIdentityMap.size() <= idxOtherMap.size()) {
return EasyStream.of(idxIdentityMap.keySet(), isParallel()).map(k -> zipper.apply(idxIdentityMap.get(k), idxOtherMap.get(k)));
}
return EasyStream.of(list).parallel(isParallel()).onClose(unwrap()::close);
return EasyStream.of(idxOtherMap.keySet(), isParallel()).map(k -> zipper.apply(idxIdentityMap.get(k), idxOtherMap.get(k)));
}
/**
@ -78,9 +68,9 @@ public interface TransformableWrappedStream<T, S extends TransformableWrappedStr
return EasyStream.<EasyStream<T>>of(EasyStream.of(list, isParallel()));
}
return EasyStream.iterate(0, i -> i < size, i -> i + batchSize)
.map(skip -> EasyStream.of(list.subList(skip, Math.min(size, skip + batchSize)), isParallel()))
.parallel(isParallel())
.onClose(unwrap()::close);
.map(skip -> EasyStream.of(list.subList(skip, Math.min(size, skip + batchSize)), isParallel()))
.parallel(isParallel())
.onClose(unwrap()::close);
}
/**
@ -114,8 +104,8 @@ public interface TransformableWrappedStream<T, S extends TransformableWrappedStr
/**
* 将当前流转为键值对流
*
* @param keyMapper 键的映射方法
* @param <K> 键类型
* @param keyMapper 键的映射方法
* @param <K> 键类型
* @return {@link EntryStream}实例
*/
default <K> EntryStream<K, T> toEntries(final Function<T, K> keyMapper) {
@ -158,7 +148,7 @@ public interface TransformableWrappedStream<T, S extends TransformableWrappedStr
default S splice(final int start, final int deleteCount, final T... items) {
final List<T> elements = unwrap().collect(Collectors.toList());
return wrap(ListUtil.splice(elements, start, deleteCount, items).stream())
.parallel(isParallel());
.parallel(isParallel());
}
/**
@ -191,15 +181,15 @@ public interface TransformableWrappedStream<T, S extends TransformableWrappedStr
}
/**
* <<p>删除流中与断言匹配的元素当遇到第一个不匹配的元素时终止返回由剩余不匹配的元素组成的流<br>
* 删除流中与断言匹配的元素当遇到第一个不匹配的元素时终止返回由剩余不匹配的元素组成的流
* eg:
* <pre>{@code
* EasyStream.of(1, 2, 3, 4, 5)
* .dropWhile(i -> !Objects.equals(3, i)) // 删除不为3的元素一直到遇到第一个3为止
* .toList(); // = [3, 4, 5]
* }</pre>
*
* <p>{@code JDK9}中的{@code dropWhile}方法不太一样此操作为顺序且有状态的中间操作
* <p>
* {@code JDK9}中的{@code dropWhile}方法不太一样此操作为顺序且有状态的中间操作
* 即使在并行流中该操作仍然是顺序执行的并且不影响后续的并行操作
* <pre>{@code
* EasyStream.iterate(1, i -> i + 1)
@ -261,6 +251,7 @@ public interface TransformableWrappedStream<T, S extends TransformableWrappedStr
/**
* 返回与指定函数将元素作为参数执行后组成的流操作带下标并行流时下标永远为-1
* 这是一个无状态中间操作
*
* @param action 指定的函数
* @return 返回叠加操作后的FastStream
* @apiNote 该方法存在的意义主要是用来调试
@ -490,8 +481,8 @@ public interface TransformableWrappedStream<T, S extends TransformableWrappedStr
Objects.requireNonNull(childrenSetter);
final MutableObj<Function<T, EasyStream<T>>> recursiveRef = new MutableObj<>();
final Function<T, EasyStream<T>> recursive = e -> EasyStream.of(childrenGetter.apply(e))
.flat(recursiveRef.get())
.unshift(e);
.flat(recursiveRef.get())
.unshift(e);
recursiveRef.set(recursive);
return wrap(flatMap(recursive).peek(e -> childrenSetter.accept(e, null)));
}

View File

@ -33,7 +33,7 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testToUnmodifiableList() {
final List<Integer> list = wrap(1, 2, 3)
.toUnmodifiableList();
.toUnmodifiableList();
Assert.assertThrows(UnsupportedOperationException.class, () -> list.remove(0));
}
@ -47,7 +47,7 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testToUnmodifiableSet() {
final Set<Integer> set = wrap(1, 2, 3)
.toUnmodifiableSet();
.toUnmodifiableSet();
Assert.assertThrows(UnsupportedOperationException.class, () -> set.remove(0));
}
@ -98,8 +98,8 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testFindFirst() {
final List<Integer> list = asList(1, 2, 3);
Assert.assertEquals((Integer)1, wrap(list).findFirst(t -> (t & 1) == 1).orElse(null));
Assert.assertEquals((Integer)1, wrap(list).filter(t -> (t & 1) == 1).findFirst().orElse(null));
Assert.assertEquals((Integer) 1, wrap(list).findFirst(t -> (t & 1) == 1).orElse(null));
Assert.assertEquals((Integer) 1, wrap(list).filter(t -> (t & 1) == 1).findFirst().orElse(null));
}
@Test
@ -111,7 +111,7 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testFindLast() {
final List<Integer> list = asList(1, 2, 3);
Assert.assertEquals((Integer)3, wrap(list).findLast(t -> (t & 1) == 1).orElse(null));
Assert.assertEquals((Integer) 3, wrap(list).findLast(t -> (t & 1) == 1).orElse(null));
}
@Test
@ -123,7 +123,7 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testAt() {
final List<Integer> list = asList(1, 2, 3);
Assert.assertEquals((Integer)3, wrap(list).at(2).orElse(null));
Assert.assertEquals((Integer) 3, wrap(list).at(2).orElse(null));
}
@Test
@ -219,13 +219,13 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testMapToInt() {
final int[] array = wrap(1, 2, 3).mapToInt(Integer::intValue).toArray();
Assert.assertArrayEquals(new int[] {1, 2, 3}, array);
Assert.assertArrayEquals(new int[]{1, 2, 3}, array);
}
@Test
public void testMapToLong() {
final long[] array = wrap(1L, 2L, 3L).mapToLong(Long::intValue).toArray();
Assert.assertArrayEquals(new long[] {1L, 2L, 3L}, array);
Assert.assertArrayEquals(new long[]{1L, 2L, 3L}, array);
}
@Test
@ -239,13 +239,13 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testFlatMapToInt() {
final int[] array = wrap(1, 2, 3).flatMapToInt(IntStream::of).toArray();
Assert.assertArrayEquals(new int[] {1, 2, 3}, array);
Assert.assertArrayEquals(new int[]{1, 2, 3}, array);
}
@Test
public void testFlatMapToLong() {
final long[] array = wrap(1L, 2L, 3L).flatMapToLong(LongStream::of).toArray();
Assert.assertArrayEquals(new long[] {1L, 2L, 3L}, array);
Assert.assertArrayEquals(new long[]{1L, 2L, 3L}, array);
}
@Test
@ -312,28 +312,28 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testReduce() {
Assert.assertEquals((Integer)6, wrap(1, 2, 3).reduce(Integer::sum).orElse(null));
Assert.assertEquals((Integer)6, wrap(1, 2, 3).reduce(0, Integer::sum));
Assert.assertEquals((Integer)6, wrap(1, 2, 3).reduce(0, Integer::sum, Integer::sum));
Assert.assertEquals((Integer) 6, wrap(1, 2, 3).reduce(Integer::sum).orElse(null));
Assert.assertEquals((Integer) 6, wrap(1, 2, 3).reduce(0, Integer::sum));
Assert.assertEquals((Integer) 6, wrap(1, 2, 3).reduce(0, Integer::sum, Integer::sum));
}
@Test
public void testCollect() {
Assert.assertEquals(asList(1, 2, 3), wrap(1, 2, 3).collect(Collectors.toList()));
Assert.assertEquals(
asList(1, 2, 3),
wrap(1, 2, 3).collect(ArrayList::new, List::add, List::addAll)
asList(1, 2, 3),
wrap(1, 2, 3).collect(ArrayList::new, List::add, List::addAll)
);
}
@Test
public void testMin() {
Assert.assertEquals((Integer)1, wrap(1, 2, 3).min(Comparator.comparingInt(Integer::intValue)).orElse(null));
Assert.assertEquals((Integer) 1, wrap(1, 2, 3).min(Comparator.comparingInt(Integer::intValue)).orElse(null));
}
@Test
public void testMax() {
Assert.assertEquals((Integer)3, wrap(1, 2, 3).max(Comparator.comparingInt(Integer::intValue)).orElse(null));
Assert.assertEquals((Integer) 3, wrap(1, 2, 3).max(Comparator.comparingInt(Integer::intValue)).orElse(null));
}
@Test
@ -377,7 +377,7 @@ public class AbstractEnhancedWrappedStreamTest {
public void testSpliterator() {
final Spliterator<Integer> iter1 = Stream.of(1, 2, 3).spliterator();
final Spliterator<Integer> iter2 = wrap(1, 2, 3).spliterator();
Assert.assertEquals(iter1.trySplit().estimateSize(), iter2.trySplit().estimateSize());
Assert.assertEquals(iter1.trySplit().estimateSize(), iter2.trySplit().estimateSize());
}
@Test
@ -412,7 +412,7 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testReverse() {
Assert.assertEquals(
asList(3, 2, 1), wrap(1, 2, 3).reverse().toList()
asList(3, 2, 1), wrap(1, 2, 3).reverse().toList()
);
}
@ -424,15 +424,15 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testSplice() {
Assert.assertEquals(
asList(1, 4, 5), wrap(1, 2, 3).splice(1, 2, 4, 5).toList()
asList(1, 4, 5), wrap(1, 2, 3).splice(1, 2, 4, 5).toList()
);
}
@Test
public void testTakeWhile() {
Assert.assertEquals(
asList(1, 2),
wrap(1, 2, 3, 4).takeWhile(i -> !Objects.equals(i, 3)).toList()
asList(1, 2),
wrap(1, 2, 3, 4).takeWhile(i -> !Objects.equals(i, 3)).toList()
);
}
@ -440,15 +440,15 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testDropWhile() {
Assert.assertEquals(
asList(3, 4),
wrap(1, 2, 3, 4).dropWhile(i -> !Objects.equals(i, 3)).toList()
asList(3, 4),
wrap(1, 2, 3, 4).dropWhile(i -> !Objects.equals(i, 3)).toList()
);
}
@Test
public void testDistinct() {
Assert.assertEquals(
asList(1, 2, 3), wrap(1, 1, 2, 3).distinct().toList()
asList(1, 2, 3), wrap(1, 1, 2, 3).distinct().toList()
);
}
@ -460,41 +460,41 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testPush() {
Assert.assertEquals(
asList(1, 2, 3), wrap(1).push(2, 3).toList()
asList(1, 2, 3), wrap(1).push(2, 3).toList()
);
}
@Test
public void testUnshift() {
Assert.assertEquals(
asList(1, 2, 3), wrap(3).unshift(1, 2).toList()
asList(1, 2, 3), wrap(3).unshift(1, 2).toList()
);
}
@Test
public void testAppend() {
Assert.assertEquals(
asList(1, 2, 3), wrap(1).append(asList(2, 3)).toList()
asList(1, 2, 3), wrap(1).append(asList(2, 3)).toList()
);
Assert.assertEquals(
asList(1, 2, 3), wrap(1, 2, 3).append(null).toList()
asList(1, 2, 3), wrap(1, 2, 3).append(null).toList()
);
}
@Test
public void testPrepend() {
Assert.assertEquals(
asList(1, 2, 3), wrap(3).prepend(asList(1, 2)).toList()
asList(1, 2, 3), wrap(3).prepend(asList(1, 2)).toList()
);
Assert.assertEquals(
asList(1, 2, 3), wrap(1, 2, 3).prepend(null).toList()
asList(1, 2, 3), wrap(1, 2, 3).prepend(null).toList()
);
}
@Test
public void testNonNull() {
Assert.assertEquals(
asList(1, 3), wrap(1, null, 3).nonNull().toList()
asList(1, 3), wrap(1, null, 3).nonNull().toList()
);
}
@ -502,11 +502,11 @@ public class AbstractEnhancedWrappedStreamTest {
public void testFilterIdx() {
final List<Integer> indexes = new ArrayList<>();
Assert.assertEquals(
asList(1, 3),
wrap(1, 2, 3).filterIdx((t, i) -> {
indexes.add(i);
return (t & 1) == 1;
}).toList()
asList(1, 3),
wrap(1, 2, 3).filterIdx((t, i) -> {
indexes.add(i);
return (t & 1) == 1;
}).toList()
);
Assert.assertEquals(asList(0, 1, 2), indexes);
}
@ -514,14 +514,14 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testFilter() {
Assert.assertEquals(
asList(1, 3), wrap(1, 2, 3).filter(i -> (i & 1) == 1).toList()
asList(1, 3), wrap(1, 2, 3).filter(i -> (i & 1) == 1).toList()
);
}
@Test
public void testFlatMap() {
Assert.assertEquals(
asList(1, 2, 3), wrap(1, 2, 3).flatMap(Stream::of).toList()
asList(1, 2, 3), wrap(1, 2, 3).flatMap(Stream::of).toList()
);
}
@ -529,10 +529,10 @@ public class AbstractEnhancedWrappedStreamTest {
public void testFlatMapIdx() {
final List<Integer> indexes = new ArrayList<>();
Assert.assertEquals(
asList(1, 2, 3), wrap(1, 2, 3).flatMapIdx((t, i) -> {
indexes.add(i);
return Stream.of(t);
}).toList()
asList(1, 2, 3), wrap(1, 2, 3).flatMapIdx((t, i) -> {
indexes.add(i);
return Stream.of(t);
}).toList()
);
Assert.assertEquals(asList(0, 1, 2), indexes);
}
@ -540,14 +540,14 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testFlat() {
Assert.assertEquals(
asList(1, 2, 3), wrap(1, 2, 3).flat(Collections::singletonList).toList()
asList(1, 2, 3), wrap(1, 2, 3).flat(Collections::singletonList).toList()
);
}
@Test
public void testFlatNonNull() {
Assert.assertEquals(
asList(2, 3), wrap(null, 2, 3).flatNonNull(Collections::singletonList).toList()
asList(2, 3), wrap(null, 2, 3).flatNonNull(Collections::singletonList).toList()
);
}
@ -560,14 +560,14 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testMap() {
Assert.assertEquals(
asList("1", "2", "3"), wrap(1, 2, 3).map(String::valueOf).toList()
asList("1", "2", "3"), wrap(1, 2, 3).map(String::valueOf).toList()
);
}
@Test
public void testMapNonNull() {
Assert.assertEquals(
asList("3"), wrap(null, 2, 3, 4).mapNonNull(t -> ((t & 1) == 0) ? null : String.valueOf(t)).toList()
asList("3"), wrap(null, 2, 3, 4).mapNonNull(t -> ((t & 1) == 0) ? null : String.valueOf(t)).toList()
);
}
@ -575,10 +575,10 @@ public class AbstractEnhancedWrappedStreamTest {
public void testMapIdx() {
final List<Integer> indexes = new ArrayList<>();
Assert.assertEquals(
asList("1", "2", "3"), wrap(1, 2, 3).mapIdx((t, i) -> {
indexes.add(i);
return String.valueOf(t);
}).toList()
asList("1", "2", "3"), wrap(1, 2, 3).mapIdx((t, i) -> {
indexes.add(i);
return String.valueOf(t);
}).toList()
);
Assert.assertEquals(asList(0, 1, 2), indexes);
}
@ -586,10 +586,10 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testMapMulti() {
Assert.assertEquals(
asList(1, 2, 3),
wrap(1, 2, 3).mapMulti((t, builder) -> {
builder.accept(t);
}).toList()
asList(1, 2, 3),
wrap(1, 2, 3).mapMulti((t, builder) -> {
builder.accept(t);
}).toList()
);
}
@ -613,19 +613,19 @@ public class AbstractEnhancedWrappedStreamTest {
@Test
public void testToEntries() {
final Map<Integer, Integer> expect = new HashMap<Integer, Integer>(){{
final Map<Integer, Integer> expect = new HashMap<Integer, Integer>() {{
put(1, 1);
put(2, 2);
put(3, 3);
}};
Map<Integer, Integer> map = EasyStream.of(1, 2, 3)
.toEntries(Function.identity(), Function.identity())
.toMap();
.toEntries(Function.identity(), Function.identity())
.toMap();
Assert.assertEquals(expect, map);
map = EasyStream.of(1, 2, 3)
.toEntries(Function.identity())
.toMap();
.toEntries(Function.identity())
.toMap();
Assert.assertEquals(expect, map);
}
@ -636,7 +636,7 @@ public class AbstractEnhancedWrappedStreamTest {
List<String> zip = wrap(orders).zip(list, (e1, e2) -> e1 + "." + e2).toList();
Assert.assertEquals(Arrays.asList("1.dromara", "2.hutool", "3.sweet"), zip);
zip = wrap((Stream<? extends Object>)EasyStream.iterate(1, i -> i + 1)).zip(list, (e1, e2) -> e1 + "." + e2).toList();
zip = wrap((Stream<? extends Object>) EasyStream.iterate(1, i -> i + 1)).limit(10).zip(list, (e1, e2) -> e1 + "." + e2).toList();
Assert.assertEquals(Arrays.asList("1.dromara", "2.hutool", "3.sweet"), zip);
}