|
public ValueAs ( |
||
| returnType | ||
| Результат | object | |
public virtual object ValueAs(Type returnType) { return ValueAs(returnType, null); }
public abstract object ValueAs(Type returnType, IXmlNamespaceResolver nsResolver);|
XPathItem::ValueAs ( |
public bool Match(XPathItem item, XQueryContext context)
{
switch (TypeCode)
{
case XmlTypeCode.None:
return false;
case XmlTypeCode.Item:
return true;
case XmlTypeCode.Node:
return item.IsNode;
case XmlTypeCode.AnyAtomicType:
return !item.IsNode;
case XmlTypeCode.UntypedAtomic:
return !item.IsNode && item.XmlType == XmlSchema.UntypedAtomic;
case XmlTypeCode.Document:
{
XPathNavigator nav = item as XPathNavigator;
if (nav != null)
{
if (nav.NodeType == XPathNodeType.Root)
{
XPathNavigator cur = nav.Clone();
if (SchemaElement == null)
{
if (cur.MoveToChild(XPathNodeType.Element) && MatchName(cur, context))
{
if (SchemaType == null || SchemaType == XmlSchema.UntypedAtomic)
return true;
IXmlSchemaInfo schemaInfo = cur.SchemaInfo;
if (schemaInfo != null)
{
if (XmlSchemaType.IsDerivedFrom(schemaInfo.SchemaType, SchemaType, XmlSchemaDerivationMethod.Empty))
return !schemaInfo.IsNil || Nillable;
}
else
return XmlSchemaType.IsDerivedFrom(XmlSchema.UntypedAtomic, SchemaType, XmlSchemaDerivationMethod.Empty);
}
}
else
{
if (!cur.MoveToChild(XPathNodeType.Element))
return false;
IXmlSchemaInfo schemaInfo = cur.SchemaInfo;
if (schemaInfo != null)
return schemaInfo.SchemaElement.QualifiedName == SchemaElement.QualifiedName;
}
}
}
}
break;
case XmlTypeCode.Element:
{
XPathNavigator nav = item as XPathNavigator;
if (nav != null && nav.NodeType == XPathNodeType.Element)
{
if (SchemaElement == null)
{
if (MatchName(nav, context))
{
if (SchemaType == null || SchemaType == XmlSchema.UntypedAtomic)
return true;
IXmlSchemaInfo schemaInfo = nav.SchemaInfo;
if (schemaInfo != null)
{
if (XmlSchemaType.IsDerivedFrom(schemaInfo.SchemaType, SchemaType, XmlSchemaDerivationMethod.Empty))
return !schemaInfo.IsNil || Nillable;
}
else
return XmlSchemaType.IsDerivedFrom(XmlSchema.UntypedAtomic, SchemaType, XmlSchemaDerivationMethod.Empty);
}
}
else
{
IXmlSchemaInfo schemaInfo = nav.SchemaInfo;
if (schemaInfo != null)
return schemaInfo.SchemaElement.QualifiedName == SchemaElement.QualifiedName;
}
}
}
break;
case XmlTypeCode.Attribute:
{
XPathNavigator nav = item as XPathNavigator;
if (nav != null && nav.NodeType == XPathNodeType.Attribute)
{
if (SchemaAttribute == null)
{
if (MatchName(nav, context))
{
if (SchemaType == null || SchemaType == XmlSchema.UntypedAtomic)
return true;
IXmlSchemaInfo schemaInfo = nav.SchemaInfo;
if (schemaInfo == null)
return XmlSchemaType.IsDerivedFrom(XmlSchema.UntypedAtomic, SchemaType, XmlSchemaDerivationMethod.Empty);
else
return XmlSchemaType.IsDerivedFrom(schemaInfo.SchemaType, SchemaType, XmlSchemaDerivationMethod.Empty);
}
}
else
{
IXmlSchemaInfo schemaInfo = nav.SchemaInfo;
if (schemaInfo != null)
return schemaInfo.SchemaAttribute.QualifiedName == SchemaAttribute.QualifiedName;
}
}
}
break;
case XmlTypeCode.ProcessingInstruction:
{
XPathNavigator nav = item as XPathNavigator;
if (nav != null)
return (nav.NodeType == XPathNodeType.ProcessingInstruction &&
(NameTest.IsNameWildcard || NameTest.Name == nav.Name));
}
break;
case XmlTypeCode.Comment:
{
XPathNavigator nav = item as XPathNavigator;
if (nav != null)
return nav.NodeType == XPathNodeType.Comment;
}
break;
case XmlTypeCode.Text:
{
XPathNavigator nav = item as XPathNavigator;
if (nav != null)
return nav.NodeType == XPathNodeType.Text ||
nav.NodeType == XPathNodeType.SignificantWhitespace;
}
break;
case XmlTypeCode.PositiveInteger:
switch (item.XmlType.TypeCode)
{
case XmlTypeCode.Byte:
case XmlTypeCode.Short:
case XmlTypeCode.Int:
case XmlTypeCode.Long:
case XmlTypeCode.Integer:
return (decimal)item.ValueAs(typeof(System.Decimal)) > 0;
}
break;
case XmlTypeCode.NegativeInteger:
switch (item.XmlType.TypeCode)
{
case XmlTypeCode.Byte:
case XmlTypeCode.Short:
case XmlTypeCode.Int:
case XmlTypeCode.Long:
case XmlTypeCode.Integer:
return (decimal)item.ValueAs(typeof(System.Decimal)) < 0;
}
break;
case XmlTypeCode.NonPositiveInteger:
switch (item.XmlType.TypeCode)
{
case XmlTypeCode.Byte:
case XmlTypeCode.Short:
case XmlTypeCode.Int:
case XmlTypeCode.Long:
case XmlTypeCode.Integer:
return (decimal)item.ValueAs(typeof(System.Decimal)) <= 0;
}
break;
case XmlTypeCode.NonNegativeInteger:
switch (item.XmlType.TypeCode)
{
case XmlTypeCode.Byte:
case XmlTypeCode.Short:
case XmlTypeCode.Int:
case XmlTypeCode.Long:
case XmlTypeCode.Integer:
return (decimal)item.ValueAs(typeof(System.Decimal)) >= 0;
case XmlTypeCode.UnsignedByte:
case XmlTypeCode.UnsignedShort:
case XmlTypeCode.UnsignedInt:
case XmlTypeCode.UnsignedLong:
return true;
}
break;
case XmlTypeCode.Integer:
switch (item.XmlType.TypeCode)
{
case XmlTypeCode.Byte:
case XmlTypeCode.Short:
case XmlTypeCode.Int:
case XmlTypeCode.Long:
case XmlTypeCode.Integer:
case XmlTypeCode.UnsignedByte:
case XmlTypeCode.UnsignedShort:
case XmlTypeCode.UnsignedInt:
case XmlTypeCode.UnsignedLong:
return true;
case XmlTypeCode.Decimal:
decimal value = (decimal)item.ValueAs(typeof(System.Decimal));
return value == Math.Truncate(value);
}
break;
case XmlTypeCode.Entity:
return (item.XmlType.TypeCode == XmlTypeCode.String) ||
(item.XmlType.TypeCode == XmlTypeCode.Entity);
default:
{
if (item.XmlType != null)
return XmlSchemaType.IsDerivedFrom(item.XmlType, SchemaType, XmlSchemaDerivationMethod.Empty);
}
break;
}
return false;
}
