java如何将带有服务调用的循环重构为流？

Question

您将如何将此代码重构为流

for (ConditionEntity conditionEntity : dbData.getContent()) {
    AdminCondition adminCondition = 
            dataEntityMapper.conditionEntitytoModel(conditionEntity);

    this.myService.addBasicInterest(adminCondition); // <=== this is my Problem
    conditionList.add(adminCondition);
}

到目前为止，我已经做到了：

dbData.getContent().stream()
    .map(conditionEntity -> dataEntityMapper.conditionEntitytoModel(conditionEntity))
    .collect(conditionList);

谢谢你的帮助

Answer 1

就做下面这样的事情

dbData.getContent().stream()
  .map(conditionEntity -> {
      AdminCondition adminCondition = dataEntityMapper.conditionEntitytoModel(conditionEntity);
      this.myService.addBasicInterest(adminCondition);
  }) 
.collect(conditionList);

Answer 2

List<AdminCondition > conditionList = new ArrayList<>();

dbData.getContent()
      .stream()
      .map(conditionEntity -> dataEntityMapper.conditionEntitytoModel(conditionEntity))
      .forEach(adminCondition  -> {
            this.myService.addBasicInterest(adminCondition);
            conditionList.add(adminCondition);
                   });

Answer 3

我很可能会把这两个单独的声明

dbData.getContent().stream()
    .map(conditionEntity -> dataEntityMapper.conditionEntitytoModel(conditionEntity))
    .collect(conditionList);

conditionList.forEach(adminCondition -> this.myService.addBasicInterest(adminCondition))

Answer 4

我更喜欢以下解决方案：

List<ConditionEntity> conditions = dbData.getContent().stream()
        .map(dataEntityMapper::conditionEntitytoModel)
        .collect(Collectors.toList());

conditions.forEach(this::addBasicInterest);