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// Author: Dwivedi, Ajay kumar
// Adwiv@Yahoo.com
using System;
using System.Xml;
namespace System.Xml.Schema
{
/// <summary>
/// Summary description for XmlSchemaKey.
/// </summary>
public class XmlSchemaKey : XmlSchemaIdentityConstraint
{
private static string xmlname = "key";
public XmlSchemaKey()
{
}
/// <remarks>
/// 1. name must be present
/// 2. selector and field must be present
/// </remarks>
[MonoTODO]
internal new int Compile(ValidationEventHandler h, XmlSchemaInfo info)
{
return base.Compile(h,info);
}
[MonoTODO]
internal int Validate(ValidationEventHandler h)
{
return errorCount;
}
internal new void error(ValidationEventHandler handle, string message)
{
errorCount++;
ValidationHandler.RaiseValidationError(handle, this, message);
}
//<key
// id = ID
// name = NCName
// {any attributes with non-schema namespace . . .}>
// Content: (annotation?, (selector, field+))
//</key>
internal static XmlSchemaKey Read(XmlSchemaReader reader, ValidationEventHandler h)
{
XmlSchemaKey key = new XmlSchemaKey();
reader.MoveToElement();
if(reader.NamespaceURI != XmlSchema.Namespace || reader.LocalName != xmlname)
{
error(h,"Should not happen :1: XmlSchemaKey.Read, name="+reader.Name,null);
reader.Skip();
return null;
}
key.LineNumber = reader.LineNumber;
key.LinePosition = reader.LinePosition;
key.SourceUri = reader.BaseURI;
while(reader.MoveToNextAttribute())
{
if(reader.Name == "id")
{
key.Id = reader.Value;
}
else if(reader.Name == "name")
{
key.Name = reader.Value;
}
else if((reader.NamespaceURI == "" && reader.Name != "xmlns") || reader.NamespaceURI == XmlSchema.Namespace)
{
error(h,reader.Name + " is not a valid attribute for key",null);
}
else
{
XmlSchemaUtil.ReadUnhandledAttribute(reader,key);
}
}
reader.MoveToElement();
if(reader.IsEmptyElement)
return key;
// Content: annotation?, selector, field+
int level = 1;
while(reader.ReadNextElement())
{
if(reader.NodeType == XmlNodeType.EndElement)
{
if(reader.LocalName != xmlname)
error(h,"Should not happen :2: XmlSchemaKey.Read, name="+reader.Name,null);
break;
}
if(level <= 1 && reader.LocalName == "annotation")
{
level = 2; //Only one annotation
XmlSchemaAnnotation annotation = XmlSchemaAnnotation.Read(reader,h);
if(annotation != null)
key.Annotation = annotation;
continue;
}
if(level <= 2 && reader.LocalName == "selector")
{
level = 3;
XmlSchemaXPath selector = XmlSchemaXPath.Read(reader,h,"selector");
if(selector != null)
key.Selector = selector;
continue;
}
if(level <= 3 && reader.LocalName == "field")
{
level = 3;
if(key.Selector == null)
error(h,"selector must be defined before field declarations",null);
XmlSchemaXPath field = XmlSchemaXPath.Read(reader,h,"field");
if(field != null)
key.Fields.Add(field);
continue;
}
reader.RaiseInvalidElementError();
}
return key;
}
}
}
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