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//------------------------------------------------------------------------------
// <copyright file="ConfigurationValidatorAttribute.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
using System;
using System.Configuration.Internal;
using System.Collections;
using System.Collections.Specialized;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Security.Permissions;
using System.Xml;
using System.Globalization;
using System.ComponentModel;
using System.Security;
using System.Text;
namespace System.Configuration {
[AttributeUsage(AttributeTargets.Property)]
public class ConfigurationValidatorAttribute : Attribute {
internal Type _declaringType;
private readonly Type _validator;
protected ConfigurationValidatorAttribute() {
}
public ConfigurationValidatorAttribute(Type validator) {
if (validator == null) {
throw new ArgumentNullException("validator");
}
if (!typeof(ConfigurationValidatorBase).IsAssignableFrom(validator)) {
throw new ArgumentException(SR.GetString(SR.Validator_Attribute_param_not_validator, "ConfigurationValidatorBase"));
}
_validator = validator;
}
public virtual ConfigurationValidatorBase ValidatorInstance {
get {
return (ConfigurationValidatorBase)TypeUtil.CreateInstanceRestricted(_declaringType, _validator);
}
}
// Used for limiting the visibility of types that can be accessed in the reflection
// call made by the ValidatorInstance property getter. This will normally be the
// type that declared the attribute, but in certain cases it could be a subclass
// of the type that declared the attribute. This should be ok from a security
// perspective, as one wouldn't reasonably expect a derived type to have fewer
// security constraints than its base type.
internal void SetDeclaringType(Type declaringType) {
if (declaringType == null) {
Debug.Fail("Declaring type must not be null.");
return; // don't throw in an in-place update
}
if (_declaringType == null) {
// First call to this method - allow any type to be set
_declaringType = declaringType;
}
else if (_declaringType != declaringType) {
Debug.Fail("Subsequent calls cannot change the declaring type of the attribute.");
return; // don't throw in an in-place update
}
}
public Type ValidatorType {
get {
return _validator;
}
}
}
}
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