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//---------------------------------------------------------------------
// <copyright file="FacetDescriptionElement.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Text;
using System.Data.Metadata.Edm;
using System.Xml;
using System.Diagnostics;
namespace System.Data.EntityModel.SchemaObjectModel
{
internal abstract class FacetDescriptionElement : SchemaElement
{
int? _minValue;
int? _maxValue;
object _defaultValue;
bool _isConstant;
// won't be populated till you call CreateAndValidate
FacetDescription _facetDescription;
public FacetDescriptionElement(TypeElement type, string name)
: base(type, name)
{
}
protected override bool ProhibitAttribute(string namespaceUri, string localName)
{
if (base.ProhibitAttribute(namespaceUri, localName))
{
return true;
}
if (namespaceUri == null && localName == XmlConstants.Name)
{
return false;
}
return false;
}
protected override bool HandleAttribute(XmlReader reader)
{
if (base.HandleAttribute(reader))
{
return true;
}
else if (CanHandleAttribute(reader, XmlConstants.MinimumAttribute))
{
HandleMinimumAttribute(reader);
return true;
}
else if (CanHandleAttribute(reader, XmlConstants.MaximumAttribute))
{
HandleMaximumAttribute(reader);
return true;
}
else if (CanHandleAttribute(reader, XmlConstants.DefaultValueAttribute))
{
HandleDefaultAttribute(reader);
return true;
}
else if (CanHandleAttribute(reader, XmlConstants.ConstantAttribute))
{
HandleConstantAttribute(reader);
return true;
}
return false;
}
/////////////////////////////////////////////////////////////////////
// Attribute Handlers
/// <summary>
/// Handler for the Minimum attribute
/// </summary>
/// <param name="reader">xml reader currently positioned at Minimum attribute</param>
protected void HandleMinimumAttribute(XmlReader reader)
{
int value = -1;
if (HandleIntAttribute(reader, ref value))
{
_minValue = value;
}
}
/// <summary>
/// Handler for the Maximum attribute
/// </summary>
/// <param name="reader">xml reader currently positioned at Maximum attribute</param>
protected void HandleMaximumAttribute(XmlReader reader)
{
int value = -1;
if (HandleIntAttribute(reader, ref value))
{
_maxValue = value;
}
}
/// <summary>
/// Handler for the Default attribute
/// </summary>
/// <param name="reader">xml reader currently positioned at Default attribute</param>
protected abstract void HandleDefaultAttribute(XmlReader reader);
/// <summary>
/// Handler for the Constant attribute
/// </summary>
/// <param name="reader">xml reader currently positioned at Constant attribute</param>
protected void HandleConstantAttribute(XmlReader reader)
{
bool value = false;
if (HandleBoolAttribute(reader, ref value))
{
_isConstant = value;
}
}
public abstract EdmType FacetType{ get; }
public int? MinValue
{
get { return _minValue; }
}
public int? MaxValue
{
get { return _maxValue; }
}
public object DefaultValue
{
get { return _defaultValue; }
set { _defaultValue = value; }
}
public FacetDescription FacetDescription
{
get
{
Debug.Assert(_facetDescription != null, "Did you forget to call CreateAndValidate first?");
return _facetDescription;
}
}
internal void CreateAndValidateFacetDescription(string declaringTypeName)
{
_facetDescription = new FacetDescription(Name, FacetType, MinValue, MaxValue, DefaultValue, _isConstant, declaringTypeName);
}
}
}
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