使Java API流引发异常

Question

我有一个包含属性的对象，该属性是包含两个字符串属性的对象列表。我的目标是将此映射的键与另一个包含字符串属性的对象进行比较。

为了更清楚我的请求包含地图：

"documentType": "Document"
"fields": [
  {
    "name": "something",
    "value": "123456789"
  },
  {
    "name": "somethingElse",
    "value": "Someone"
  },
  {
    "name": "notADocumentColumn",
    "value": "shouldThrowException"
  },
  {
    "name": "notexistingcolumn",
    "value": "not a column"
  }
]

我的sharePointDriveResponse包含以下列：

"columns": [
     {
         "columnGroup": "Document",
         "description": "",
         "displayName": "something",
         "enforceUniqueValues": false,
         "hidden": false,
         "id": "8553196d-ec8d-4564-9861-xxxxxxxxxxxx",
         "indexed": false,
         "name": "FileLeafRef",
         "readOnly": false,
         "required": true
    },
    {
         "columnGroup": "Billing or Whatever",
         "description": "",
         "displayName": "notADocumentColumn",
         "enforceUniqueValues": false,
         "hidden": false,
         "id": "3a6b296c-3f50-445c-a13f-xxxxxxxxxxxx",
         "indexed": false,
         "name": "ComplianceAssetId",
         "readOnly": true,
         "required": false,
         "text": {
             "allowMultipleLines": false,
             "appendChangesToExistingText": false,
             "linesForEditing": 0,
             "maxLength": 255
         }
     },

在这个阶段，我实现了一些工作正常的东西：

List<String> check = sharePointDriveResponse.getColumns()
        .stream()
        .map(SharePointColumnsResponse::getDisplayName)
        .collect(Collectors.toList())
        .stream()
        .filter(request.getFields()::containsKey)
        .collect(Collectors.toList());

if(check.size() == request.getFields().size()) {
    System.out.println("It's OK !");
} else {
    throw new RequestException("One column provided doesn't exist");
}

我的问题如下：

1. 在这里传输数据时是否可能引发异常

sharePointDriveResponse.getColumns()
            .stream()
            .map(SharePointColumnsResponse::getDisplayName)
            .collect(Collectors.toList())
            .stream()
            .filter(request.getFields()::containsKey)
            .collect(Collectors.toList());
            // some operator here to throw exception 

在示例中：我发送一个创建文档的请求，并传递一个不允许文档使用但允许其他内容类型使用的字段。

"columnGroup": "Billing or Whatever",
"description": "",
"displayName": "notADocumentColumn",

我也想为这个案子破例。我也可以像以前那样重建一个类似的东西，但是我会因为这个简单的任务而失去效率。

List<String> checkColumnsContentType = sharePointDriveResponse.getColumns()
        .stream()
        .map(SharePointColumnsResponse::getColumnGroup)
        .collect(Collectors.toList())
        .stream()
        .filter(request.getFields()::containsKey)
        .collect(Collectors.toList());

Answer 1

我找到了问题第一点的答案。因为写这个问题花了一些时间，所以即使解决了这个问题，我还是让它继续。这是我的实现。

    sharePointDriveResponse.getColumns()
            .stream()
            .map(SharePointColumnsResponse::getDisplayName)
            .collect(toList())
            .stream()
            .filter(request.getFields()::containsKey)
            .collect(collectingAndThen(toList(), l -> {
                if (l.size() != request.getFields().size())
                    throw new RuntimeException("One column provided doesn't exist");
                return l;
            }));