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:trollface: 添加一个toTree的重载

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VampireAchao 2022-11-03 16:32:34 +08:00
parent b696ad4b08
commit 632d4de950
1 changed files with 26 additions and 1 deletions
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27
hutool-core/src/main/java/cn/hutool/core/stream/TerminableWrappedStream.java
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@ -226,7 +226,32 @@ public interface TerminableWrappedStream<T, S extends TerminableWrappedStream<T,
final Function<T, R> idGetter,
final Function<T, R> pIdGetter,
final BiConsumer<T, List<T>> childrenSetter) {
return collect(CollectorUtil.toTree(idGetter, pIdGetter, childrenSetter, isParallel()));
return toTree(idGetter, pIdGetter, null, childrenSetter);
}
/**
* <p>将集合转换为树，传入 {@code parentId == value} 来判断树的根节点
* 因为需要在当前传入数据里查找，所以这是一个结束操作 <br>
*
* @param idGetter id的getter对应的lambda，可以写作 {@code Student::getId}
* @param pIdGetter parentId的getter对应的lambda，可以写作 {@code Student::getParentId}
* @param pIdValue parentId的值，支持 {@code null}
* @param childrenSetter children的setter对应的lambda，可以写作{ @code Student::setChildren}
* @param <R> 此处是id、parentId的泛型限制
* @return list 组装好的树 <br>
* eg:
* <pre>{@code
* List<Student> studentTree = EasyStream.of(students).
* toTree(Student::getId, Student::getParentId, 0L, Student::setChildren);
* }</pre>
* @author VampireAchao
*/
default <R extends Comparable<R>> List<T> toTree(
final Function<T, R> idGetter,
final Function<T, R> pIdGetter,
final R pIdValue,
final BiConsumer<T, List<T>> childrenSetter) {
return collect(CollectorUtil.toTree(idGetter, pIdGetter, pIdValue, childrenSetter, isParallel()));
}
/**