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Update hutool-core/src/main/java/cn/hutool/core/tree/BeanTree.java

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emptypoint 2022-11-28 08:54:26 +00:00 committed by Gitee
parent ce576a1d33
commit f1f741bb58
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1 changed files with 7 additions and 4 deletions
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hutool-core/src/main/java/cn/hutool/core/tree/BeanTree.java
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@ -120,10 +120,13 @@ public class BeanTree<T, R extends Comparable<R>> {
* @return 转换后的树 * @return 转换后的树
*/ */
public List<T> toTree(final List<T> list) { public List<T> toTree(final List<T> list) {
if (Objects.isNull(parentPredicate)) { if (CollUtil.isEmpty(list)) {
final Map<R, List<T>> pIdValuesMap = EasyStream.of(list) return ListUtil.zero();
.peek(e -> Objects.requireNonNull(idGetter.apply(e), "The id of tree node must not be null") }
)).group(pidGetter); if (Objects.isNull(parentPredicate)) {
final Map<R, List<T>> pIdValuesMap = EasyStream.of(list)
.peek(e -> Objects.requireNonNull(idGetter.apply(e), "The id of tree node must not be null")
).group(pidGetter);
final List<T> parents = pIdValuesMap.getOrDefault(pidValue, new ArrayList<>()); final List<T> parents = pIdValuesMap.getOrDefault(pidValue, new ArrayList<>());
findChildren(list, pIdValuesMap); findChildren(list, pIdValuesMap);
return parents; return parents;