hunt.validation.validators.SizeValidator source code

1 /*
2  * Hunt - A data validation for DLang based on hunt library.
3  *
4  * Copyright (C) 2015-2019, HuntLabs
5  *
6  * Website: https://www.huntlabs.net
7  *
8  * Licensed under the Apache-2.0 License.
9  *
10  */
11 module hunt.validation.validators.SizeValidator;
12 
13 import hunt.validation.constraints.Size;
14 import hunt.validation.ConstraintValidator;
15 import hunt.validation.ConstraintValidatorContext;
16 import std.exception;
17 import hunt.validation.Validator;
18 
19 import hunt.logging;
20 import std.string;
21 
22 public class SizeValidator(T) : AbstractValidator , ConstraintValidator!(Size, T) {
23 
24     private Size _size;
25 
26     override void initialize(Size constraintAnnotation){
27         _size = constraintAnnotation;
28     }
29     
30     override
31     public bool isValid(T data, ConstraintValidatorContext constraintValidatorContext) {
32          scope(exit) constraintValidatorContext.append(this);
33         
34         static if(isArray!(T) || isAssociativeArray!(T))
35         {
36             if( data.length < _size.min || data.length > _size.max)
37             {
38                 _isValid = false;
39             }
40             else 
41             {
42                 _isValid = true;
43             }
44             return _isValid;
45         }
46         else 
47         {
48             throw new Exception("not support type : ",T.stringof);
49             _isValid = false;
50             return false;
51         }
52 
53     }
54 
55     override string getMessage()
56     {
57         import hunt.text.FormatterWrapper;
58         import hunt.util.Serialize;
59 
60         return  new FormatterWrapper("{{","}}").format(_size.message,toJSON(_size));
61     }
62 }