salesforce 零基础学习（五十八）通过sObject的field返回其对应的基础类型

Zero-Zhang

发布于 2018-01-05 11:41:52

7760

发布于 2018-01-05 11:41:52

文章被收录于专栏：salesforce零基础学习

项目中有时候会要求通过sObject的Field的type类型返回其对应的基本类型，然后对其进行相关的处理，创建sObject的field可以选择的type类型是固定多的。

上述类型可以转换成几种基本类型：Boolean、Date、Datetime、Double、Integer、String、Time。

1.封装Primitive枚举类：封装基本类型

 1 public enum Primitive {
 2     TYPE_BOOLEAN, 
 3     TYPE_DATE, 
 4     TYPE_DATETIME, 
 5     TYPE_DOUBLE, 
 6     TYPE_INTEGER, 
 7     TYPE_STRING, 
 8     TYPE_TIMEOFDAY,
 9     TYPE_UNKNOW
10 }

2.创建PrimitiveHelper帮助类：通过字段的DataType返回相关的基本类型

 1 public without sharing class PrimitiveHelper {
 2 
 3     public static Primitive getPrimitiveTypeByField(String sObjectName,String fieldName) {
 4         Schema.DisplayType fieldType = getFieldDisplayType(sObjectName,fieldName);
 5         if(fieldType == Schema.Displaytype.BOOLEAN){
 6             return Primitive.TYPE_BOOLEAN;
 7         }
 8         else if(fieldType == Schema.Displaytype.BASE64 || fieldType == Schema.Displaytype.COMBOBOX || fieldType == Schema.Displaytype.EMAIL ||
 9                 fieldType == Schema.Displaytype.ENCRYPTEDSTRING || fieldType == Schema.Displaytype.ID || fieldType == Schema.Displaytype.MULTIPICKLIST ||
10                 fieldType == Schema.Displaytype.PHONE || fieldType == Schema.Displaytype.PICKLIST || fieldType == Schema.Displaytype.REFERENCE ||
11                 fieldType == Schema.Displaytype.STRING || fieldType == Schema.Displaytype.TEXTAREA || fieldType == Schema.Displaytype.URL){
12             return Primitive.TYPE_STRING;
13         }
14         else if(fieldType == Schema.Displaytype.CURRENCY || fieldType == Schema.Displaytype.DOUBLE || fieldType == Schema.Displaytype.PERCENT){
15             return Primitive.TYPE_DOUBLE;                       
16         }
17         else if(fieldType == Schema.Displaytype.INTEGER){
18             return Primitive.TYPE_INTEGER;                      
19         }
20         else if(fieldType == Schema.Displaytype.DATE){
21             return Primitive.TYPE_DATE;
22         }
23         else if(fieldType == Schema.Displaytype.DATETIME){
24             return Primitive.TYPE_DATETIME;
25         }
26         else {
27             throw new MyException('无对应的基础类型');
28         }
29     }
30     
31     
32     private static Schema.DisplayType getFieldDisplayType(String sObjectName,String fieldName) {
33         List<Schema.DescribeSObjectResult> sObjectTypes = Schema.describeSObjects(new String[]{sObjectName});
34         if(sObjectTypes == null || sObjectTypes.size() == 0) {
35             throw new MyException('无此Object Name');
36         }
37         Schema.DescribeSObjectResult sObjectDescribeResult = sObjectTypes.get(0);
38         Map<String,Schema.SObjectField> objectFieldMap = sObjectDescribeResult.fields.getMap();
39         Schema.SObjectField objectField = objectFieldMap.get(fieldName);
40         if(objectField == null) {
41             throw new MyException('无此Field Name');
42         }
43         Schema.DescribeFieldResult fieldResult = objectField.getDescribe();
44         
45         return fieldResult.getType();
46     }
47     
48     private class MyException extends Exception{}
49 }

效果：

1.存在的相关字段的基本类型