我有一个简单的验证器来验证String值是否是预定义列表的一部分:
public class CoBoundedStringConstraints implements ConstraintValidator<CoBoundedString, String>
{
private List<String> m_boundedTo;
@Override
public void initialize(CoBoundedString annotation)
{
m_boundedTo = FunctorUtils.transform(annotation.value(), new ToLowerCase());
}
@Override
public boolean isValid(String value, ConstraintValidatorContext context)
{
if (value == null )
{
return true;
}
context.disableDefaultConstraintViolation();
context.buildConstraintViolationWithTemplate("should be one of " + m_boundedTo).addConstraintViolation();
return m_boundedTo.contains(value.toLowerCase());
}
}
例如,它将验证:
@CoBoundedString({"a","b" })
public String operations;
我想创建一个验证器对于一个字符串列表来验证这样的东西:
@CoBoundedString({"a","b" })
public List<String> operations = new ArrayList<String>();
我试过了:
public class CoBoundedStringListConstraints implements ConstraintValidator<CoBoundedString, List<String>>
{
private CoBoundedString m_annotation;
@Override
public void initialize(CoBoundedString annotation)
{
m_annotation = annotation;
}
@Override
public boolean isValid(List<String> value, ConstraintValidatorContext context)
{
if (value == null )
{
return true;
}
CoBoundedStringConstraints constraints = new CoBoundedStringConstraints();
constraints.initialize(m_annotation);
for (String string : value)
{
if (!constraints.isValid(string, context))
{
return false;
}
}
return true;
}
}
问题是,如果列表包含2个或更多的非法值,则只有一个(第一个)约束违规。我希望它不止一个。我该怎么做?
答案 0 :(得分:3)
您当前的代码有两个问题:
在CoBoundedStringListConstraints
的{{1}}方法中,您应该像这样迭代给定列表的所有元素(设置适当的isValid
标记):
allValid
第二个是违反约束的@Override
public boolean isValid(List<String> value,
ConstraintValidatorContext context) {
if (value == null) {
return true;
}
boolean allValid = true;
CoBoundedStringConstraints constraints = new CoBoundedStringConstraints();
constraints.initialize(m_annotation);
for (String string : value) {
if (!constraints.isValid(string, context)) {
allValid = false;
}
}
return allValid;
}
实现( equals
返回一个集合!)。当您总是输入相同的消息(javax.validation.Validator.validate()
)时,该集合仍将只包含1个元素。作为解决方案,您可以将当前值添加到消息(类should be one of [a, b]
):
CoBoundedStringConstraints