Question

具有此json文件：

{
"rolesToAdd": [],
"rolesToModify": [
    {
    "name": "administrator",
    "nativeRole": "AdminUser",
    "description": "Administrator role",
    "permissions": [
        {
        "operation": "CanAcceptRequest",
        "name": "Can admin accept request",
        "value": false
        },
        {
        "operation": "CanSeeRequest",
        "name": "Can admin see request",
        "value": false
        }
        ]
    },
    {
    "name": "simpleUser",
    "nativeRole": "User",
    "description": "User role",
    "permissions": [
        {
        "operation": "CanPostRequest",
        "name": "Can user post request",
        "value": false
        },
        {
        "operation": "CanCancel",
        "name": "Can user cancel request",
        "value": false
        }
        ]
    }
    ]
}

我需要更改此json中的值。我写了这样的方法：

Map configMap = ReadAboveJson()

def setAdminCanSeeRequest(boolean canSee) {
    configMap.rolesToModify[0].permissions[1].value = canSee
}

def setUserCanPostRequest(boolean canPost) {
    configMap.rolesToModify[1].permissions[0].value = canPost
}

如何编写这些方法，以便它们可以通过键“ name”等于“ administrator”来在rolesToModify列表中查找元素的索引，然后能够通过键“ operation”相等来在权限列表中查找索引到“ CanSeeRequest”？

我试图做这样的事情：

 int rolesToModifyIndex = configMap.rolesToModify.findIndexOf { object -> object.name == "administrator"}

但是它不起作用。感谢您的帮助。

Answer 1

检查ReadAboveJson方法的代码，可能存在一些问题，因为findIndexOf的工作方式如您所述：

import groovy.json.JsonSlurper

def input = '''{
  "rolesToAdd": [],
  "rolesToModify": [
    {
      "name": "administrator",
      "nativeRole": "AdminUser",
      "description": "Administrator role",
      "permissions": [
        {
          "operation": "CanAcceptRequest",
          "name": "Can admin accept request",
          "value": false
        },
        {
          "operation": "CanSeeRequest",
          "name": "Can admin see request",
          "value": false
        }
      ]
    },
    {
      "name": "simpleUser",
      "nativeRole": "User",
      "description": "User role",
      "permissions": [
        {
          "operation": "CanPostRequest",
          "name": "Can user post request",
          "value": false
        },
        {
          "operation": "CanCancel",
          "name": "Can user cancel request",
          "value": false
        }
      ]
    }
  ]
}
'''

def json = new JsonSlurper().parseText(input)

assert json.rolesToModify.findIndexOf { it.name == 'simpleUser' } == 1

assert json.rolesToModify.findIndexOf { it.name == 'administrator' } == 0

不过，您可以对find方法使用更简单的方法，该方法可以返回给定名称的角色，例如：

def user = json.rolesToModify.find { it.name == 'simpleUser' }

assert user.name == 'simpleUser'

assert user.permissions[0].value == false

Answer 2

请注意，JSON无效。假设进行了简单的更正，并且像这样的设置器：

def setAdminCanSeeRequest = { def configMap, def canSee ->
    myFind(configMap)["value"] = canSee
    configMap
}

然后可以将问题指定为以下内容：

def configMap = new groovy.json.JsonSlurper().parseText(s)

assert ! myFind(configMap)["value"]

configMap = setAdminCanSeeRequest(configMap, true)

assert myFind(configMap)["value"]

myFind的实现是：

def myFind = { def configMap ->
    configMap.rolesToModify.find { 
        it['name'] == 'administrator'
    }['permissions'].find {
        it['operation'] = 'CanSeeRequest'
    }
}

直接根据需要向myFind添加参数。

如何通过JSON值从嵌套的JSON对象列表中获取索引-Groovy

2 个答案: