public override Expression <Func <PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE>, ValidationResult> > GetValidateExpression <OBJECT_TYPE, PROPERTY_TYPE>()
{
if (typeof(PROPERTY_TYPE) != typeof(string))
{
throw new InvalidOperationException($"The type {typeof(PROPERTY_TYPE).Name} must be a string type");
}
var propertyValidationContext = Expression.Parameter(typeof(PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE>), "propertyValidationContext");
var minimumCheck = Expression.Call
(
null,
ValidationResult.CreateResultMethodInfo,
Expression.GreaterThanOrEqual(Expression.Property(PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE> .GetCurrentValueExpression(propertyValidationContext), "Length"), Expression.Constant(MinimumLength)),
Expression.Convert(propertyValidationContext, typeof(IPropertyValidationContext))
);
var maximumCheck = Expression.Call
(
null,
ValidationResult.CreateResultMethodInfo,
Expression.LessThanOrEqual(Expression.Property(PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE> .GetCurrentValueExpression(propertyValidationContext), "Length"), Expression.Constant(MaximumLength)),
Expression.Convert(propertyValidationContext, typeof(IPropertyValidationContext))
);
var ifNullResult = Expression.Call
(
null,
ValidationResult.CreateResultMethodInfo,
Expression.Constant(false),
Expression.Convert(propertyValidationContext, typeof(IPropertyValidationContext))
);
var body = Expression.Condition
(
Expression.Equal(PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE> .GetCurrentValueExpression(propertyValidationContext), Expression.Constant(null)),
ifNullResult,
Expression.Call(minimumCheck, ValidationResult.MergeWithMethodInfo, maximumCheck)
);
return(Expression.Lambda <Func <PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE>, ValidationResult> >(body, propertyValidationContext));
}
public override Expression <Func <PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE>, ValidationResult> > GetValidateExpression <OBJECT_TYPE, PROPERTY_TYPE>()
{
var type = typeof(PROPERTY_TYPE);
if (Nullable.GetUnderlyingType(type) != null)
{
type = Nullable.GetUnderlyingType(type);
}
switch (Type.GetTypeCode(type))
{
case TypeCode.Int16:
case TypeCode.Int32:
case TypeCode.Int64:
case TypeCode.Single:
case TypeCode.Double:
case TypeCode.Decimal:
break;
default:
throw new NotSupportedException("ValueConstraint: " + typeof(PROPERTY_TYPE));
}
PROPERTY_TYPE minimumValue, maximumValue;
if (this.MinimumValue != null)
{
minimumValue = (PROPERTY_TYPE)ChangeType(this.MinimumValue, typeof(PROPERTY_TYPE));
}
else
{
minimumValue = (PROPERTY_TYPE)typeof(PROPERTY_TYPE).GetDefaultValue();
}
if (this.MaximumValue != null)
{
maximumValue = (PROPERTY_TYPE)ChangeType(this.MaximumValue, typeof(PROPERTY_TYPE));
}
else
{
var underlyingType = Nullable.GetUnderlyingType(typeof(PROPERTY_TYPE)) ?? typeof(PROPERTY_TYPE);
var field = underlyingType.GetField("MaxValue", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static);
if (field != null)
{
maximumValue = (PROPERTY_TYPE)field.GetValue(null);
}
else
{
maximumValue = (PROPERTY_TYPE)typeof(PROPERTY_TYPE).GetDefaultValue();
}
}
var propertyValidationContext = Expression.Parameter(typeof(PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE>), "propertyValidationContext");
Expression body = null;
var minimumCheck = Expression.Call
(
null,
ValidationResult.CreateResultMethodInfo,
Expression.GreaterThanOrEqual(PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE> .GetCurrentValueExpression(propertyValidationContext), Expression.Constant(minimumValue, typeof(PROPERTY_TYPE))),
Expression.Convert(propertyValidationContext, typeof(IPropertyValidationContext))
);
var maximumCheck = Expression.Call
(
null,
ValidationResult.CreateResultMethodInfo,
Expression.LessThanOrEqual(PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE> .GetCurrentValueExpression(propertyValidationContext), Expression.Constant(maximumValue, typeof(PROPERTY_TYPE))),
Expression.Convert(propertyValidationContext, typeof(IPropertyValidationContext))
);
body = Expression.Call(minimumCheck, ValidationResult.MergeWithMethodInfo, maximumCheck);
if (Nullable.GetUnderlyingType(typeof(PROPERTY_TYPE)) != null)
{
var nullCheck = Expression.Equal(PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE> .GetCurrentValueExpression(propertyValidationContext), Expression.Constant(null));
body = Expression.Condition(nullCheck, Expression.Field(null, typeof(ValidationResult).GetField("Success", BindingFlags.Static | BindingFlags.Public)), body);
}
return(Expression.Lambda <Func <PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE>, ValidationResult> >(body, propertyValidationContext));
}
public abstract ValidationResult Validate(PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE> propertyValidationContext);
public virtual ValidationResult Validate <OBJECT_TYPE, PROPERTY_TYPE>(PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE> propertyValidationContext)
{
throw new NotImplementedException();
}
public override ValidationResult Validate(PropertyValidationContext <OBJECT_TYPE, PROPERTY_TYPE> propertyValidationContext)
{
return(this.attribute.Validate(propertyValidationContext));
}
