mcs/class/System.XML/System.Xml.Schema/XmlSchemaUnique.cs

   1 // Author: Dwivedi, Ajay kumar\r
   2 //            Adwiv@Yahoo.com\r
   3 using System;\r
   4 using System.Xml;\r
   5 \r
   6 namespace System.Xml.Schema\r
   7 {\r
   8         /// <summary>\r
   9         /// Summary description for XmlSchemaUnique.\r
  10         /// </summary>\r
  11         public class XmlSchemaUnique : XmlSchemaIdentityConstraint\r
  12         {\r
  13                 private static string xmlname = "unique";\r
  14 \r
  15                 public XmlSchemaUnique()\r
  16                 {\r
  17                 }\r
  18                 /// <remarks>\r
  19                 /// 1. name must be present\r
  20                 /// 2. selector and field must be present\r
  21                 /// </remarks>\r
  22                 [MonoTODO]\r
  23                 internal override int Compile(ValidationEventHandler h, XmlSchema schema)\r
  24                 {\r
  25                         return base.Compile(h,schema);\r
  26                 }\r
  27                 \r
  28                 [MonoTODO]\r
  29                 internal override int Validate(ValidationEventHandler h, XmlSchema schema)\r
  30                 {\r
  31                         return errorCount;\r
  32                 }\r
  33 \r
  34                 /*\r
  35                 internal new void error(ValidationEventHandler handle, string message)\r
  36                 {\r
  37                         errorCount++;\r
  38                         ValidationHandler.RaiseValidationError(handle, this, message);\r
  39                 }\r
  40                 */\r
  41                 //<unique \r
  42                 //  id = ID \r
  43                 //  name = NCName \r
  44                 //  {any attributes with non-schema namespace . . .}>\r
  45                 //  Content: (annotation?, (selector, field+))\r
  46                 //</unique>\r
  47                 internal static XmlSchemaUnique Read(XmlSchemaReader reader, ValidationEventHandler h)\r
  48                 {\r
  49                         XmlSchemaUnique unique = new XmlSchemaUnique();\r
  50                         reader.MoveToElement();\r
  51 \r
  52                         if(reader.NamespaceURI != XmlSchema.Namespace || reader.LocalName != xmlname)\r
  53                         {\r
  54                                 error(h,"Should not happen :1: XmlSchemaUnique.Read, name="+reader.Name,null);\r
  55                                 reader.Skip();\r
  56                                 return null;\r
  57                         }\r
  58 \r
  59                         unique.LineNumber = reader.LineNumber;\r
  60                         unique.LinePosition = reader.LinePosition;\r
  61                         unique.SourceUri = reader.BaseURI;\r
  62 \r
  63                         while(reader.MoveToNextAttribute())\r
  64                         {\r
  65                                 if(reader.Name == "id")\r
  66                                 {\r
  67                                         unique.Id = reader.Value;\r
  68                                 }\r
  69                                 else if(reader.Name == "name")\r
  70                                 {\r
  71                                         unique.Name = reader.Value;\r
  72                                 }\r
  73                                 else if((reader.NamespaceURI == "" && reader.Name != "xmlns") || reader.NamespaceURI == XmlSchema.Namespace)\r
  74                                 {\r
  75                                         error(h,reader.Name + " is not a valid attribute for unique",null);\r
  76                                 }\r
  77                                 else\r
  78                                 {\r
  79                                         XmlSchemaUtil.ReadUnhandledAttribute(reader,unique);\r
  80                                 }\r
  81                         }\r
  82                         \r
  83                         reader.MoveToElement();\r
  84                         if(reader.IsEmptyElement)\r
  85                                 return unique;\r
  86 \r
  87                         //  Content: annotation?, selector, field+\r
  88                         int level = 1;\r
  89                         while(reader.ReadNextElement())\r
  90                         {\r
  91                                 if(reader.NodeType == XmlNodeType.EndElement)\r
  92                                 {\r
  93                                         if(reader.LocalName != xmlname)\r
  94                                                 error(h,"Should not happen :2: XmlSchemaUnion.Read, name="+reader.Name,null);\r
  95                                         break;\r
  96                                 }\r
  97                                 if(level <= 1 && reader.LocalName == "annotation")\r
  98                                 {\r
  99                                         level = 2; //Only one annotation\r
 100                                         XmlSchemaAnnotation annotation = XmlSchemaAnnotation.Read(reader,h);\r
 101                                         if(annotation != null)\r
 102                                                 unique.Annotation = annotation;\r
 103                                         continue;\r
 104                                 }\r
 105                                 if(level <= 2 && reader.LocalName == "selector")\r
 106                                 {\r
 107                                         level = 3;\r
 108                                         XmlSchemaXPath selector = XmlSchemaXPath.Read(reader,h,"selector");\r
 109                                         if(selector != null)\r
 110                                                 unique.Selector = selector;\r
 111                                         continue;\r
 112                                 }\r
 113                                 if(level <= 3 && reader.LocalName == "field")\r
 114                                 {\r
 115                                         level = 3;\r
 116                                         if(unique.Selector == null)\r
 117                                                 error(h,"selector must be defined before field declarations",null);\r
 118                                         XmlSchemaXPath field = XmlSchemaXPath.Read(reader,h,"field");\r
 119                                         if(field != null)\r
 120                                                 unique.Fields.Add(field);\r
 121                                         continue;\r
 122                                 }\r
 123                                 reader.RaiseInvalidElementError();\r
 124                         }\r
 125                         return unique;\r
 126                 }\r
 127         }\r
 128 }\r