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

   1 // Author: Dwivedi, Ajay kumar\r
   2 //            Adwiv@Yahoo.com\r
   3
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining
   6 // a copy of this software and associated documentation files (the
   7 // "Software"), to deal in the Software without restriction, including
   8 // without limitation the rights to use, copy, modify, merge, publish,
   9 // distribute, sublicense, and/or sell copies of the Software, and to
  10 // permit persons to whom the Software is furnished to do so, subject to
  11 // the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be
  14 // included in all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23 //
  24 using System;\r
  25 using System.Xml;\r
  26 using System.Xml.Serialization;\r
  27 \r
  28 namespace System.Xml.Schema\r
  29 {\r
  30         /// <summary>\r
  31         /// Summary description for XmlSchemaKeyref.\r
  32         /// </summary>\r
  33         public class XmlSchemaKeyref : XmlSchemaIdentityConstraint\r
  34         {\r
  35                 private XmlQualifiedName refer;\r
  36                 const string xmlname = "keyref";\r
  37                 private XmlSchemaIdentityConstraint target;\r
  38 \r
  39                 public XmlSchemaKeyref()\r
  40                 {\r
  41                         refer = XmlQualifiedName.Empty;\r
  42                 }\r
  43 \r
  44                 [System.Xml.Serialization.XmlAttribute("refer")]\r
  45                 public XmlQualifiedName Refer\r
  46                 {\r
  47                         get{ return  refer; } \r
  48                         set{ refer = value; }\r
  49                 }\r
  50 \r
  51                 internal XmlSchemaIdentityConstraint Target\r
  52                 {\r
  53                         get { return target; }\r
  54                 }\r
  55 \r
  56                 /// <remarks>\r
  57                 /// 1. name must be present\r
  58                 /// 2. selector and field must be present\r
  59                 /// 3. refer must be present\r
  60                 /// </remarks>\r
  61                 internal override int Compile(ValidationEventHandler h, XmlSchema schema)\r
  62                 {\r
  63                         base.Compile(h, schema);\r
  64 \r
  65                         if(refer == null || refer.IsEmpty)\r
  66                                 error(h,"refer must be present");\r
  67                         else if(!XmlSchemaUtil.CheckQName(refer))\r
  68                                 error(h,"Refer is not a valid XmlQualifiedName");\r
  69 \r
  70                         return errorCount;\r
  71                 }\r
  72                 \r
  73                 internal override int Validate (ValidationEventHandler h, XmlSchema schema)\r
  74                 {\r
  75                         // Find target key\r
  76                         XmlSchemaIdentityConstraint target = schema.NamedIdentities [this.Refer] as XmlSchemaIdentityConstraint;\r
  77                         if (target == null)\r
  78                                 error (h, "Target key was not found.");\r
  79                         else if (target is XmlSchemaKeyref)\r
  80                                 error (h, "Target identity constraint was keyref.");\r
  81                         else if (target.Fields.Count != this.Fields.Count)\r
  82                                 error (h, "Target identity constraint has different number of fields.");\r
  83                         else\r
  84                                 this.target = target;\r
  85                         return errorCount;\r
  86                 }\r
  87 \r
  88                 /*\r
  89                 internal new void error(ValidationEventHandler handle, string message)\r
  90                 {\r
  91                         errorCount++;\r
  92                         ValidationHandler.RaiseValidationError(handle, this, message);\r
  93                 }\r
  94                 */\r
  95                 //<key \r
  96                 //  id = ID \r
  97                 //  name = NCName \r
  98                 //  refer = QName \r
  99                 //  {any attributes with non-schema namespace . . .}>\r
 100                 //  Content: (annotation?, (selector, field+))\r
 101                 //</key>\r
 102                 internal static XmlSchemaKeyref Read(XmlSchemaReader reader, ValidationEventHandler h)\r
 103                 {\r
 104                         XmlSchemaKeyref keyref = new XmlSchemaKeyref();\r
 105                         reader.MoveToElement();\r
 106 \r
 107                         if(reader.NamespaceURI != XmlSchema.Namespace || reader.LocalName != xmlname)\r
 108                         {\r
 109                                 error(h,"Should not happen :1: XmlSchemaKeyref.Read, name="+reader.Name,null);\r
 110                                 reader.Skip();\r
 111                                 return null;\r
 112                         }\r
 113 \r
 114                         keyref.LineNumber = reader.LineNumber;\r
 115                         keyref.LinePosition = reader.LinePosition;\r
 116                         keyref.SourceUri = reader.BaseURI;\r
 117 \r
 118                         while(reader.MoveToNextAttribute())\r
 119                         {\r
 120                                 if(reader.Name == "id")\r
 121                                 {\r
 122                                         keyref.Id = reader.Value;\r
 123                                 }\r
 124                                 else if(reader.Name == "name")\r
 125                                 {\r
 126                                         keyref.Name = reader.Value;\r
 127                                 }\r
 128                                 else if(reader.Name == "refer")\r
 129                                 {\r
 130                                         Exception innerex;\r
 131                                         keyref.refer = XmlSchemaUtil.ReadQNameAttribute(reader,out innerex);\r
 132                                         if(innerex != null)\r
 133                                                 error(h, reader.Value + " is not a valid value for refer attribute",innerex);\r
 134                                 }\r
 135                                 else if((reader.NamespaceURI == "" && reader.Name != "xmlns") || reader.NamespaceURI == XmlSchema.Namespace)\r
 136                                 {\r
 137                                         error(h,reader.Name + " is not a valid attribute for keyref",null);\r
 138                                 }\r
 139                                 else\r
 140                                 {\r
 141                                         XmlSchemaUtil.ReadUnhandledAttribute(reader,keyref);\r
 142                                 }\r
 143                         }\r
 144                         \r
 145                         reader.MoveToElement();\r
 146                         if(reader.IsEmptyElement)\r
 147                                 return keyref;\r
 148 \r
 149                         //  Content: annotation?, selector, field+\r
 150                         int level = 1;\r
 151                         while(reader.ReadNextElement())\r
 152                         {\r
 153                                 if(reader.NodeType == XmlNodeType.EndElement)\r
 154                                 {\r
 155                                         if(reader.LocalName != xmlname)\r
 156                                                 error(h,"Should not happen :2: XmlSchemaKeyref.Read, name="+reader.Name,null);\r
 157                                         break;\r
 158                                 }\r
 159                                 if(level <= 1 && reader.LocalName == "annotation")\r
 160                                 {\r
 161                                         level = 2; //Only one annotation\r
 162                                         XmlSchemaAnnotation annotation = XmlSchemaAnnotation.Read(reader,h);\r
 163                                         if(annotation != null)\r
 164                                                 keyref.Annotation = annotation;\r
 165                                         continue;\r
 166                                 }\r
 167                                 if(level <= 2 && reader.LocalName == "selector")\r
 168                                 {\r
 169                                         level = 3;\r
 170                                         XmlSchemaXPath selector = XmlSchemaXPath.Read(reader,h,"selector");\r
 171                                         if(selector != null)\r
 172                                                 keyref.Selector = selector;\r
 173                                         continue;\r
 174                                 }\r
 175                                 if(level <= 3 && reader.LocalName == "field")\r
 176                                 {\r
 177                                         level = 3;\r
 178                                         if(keyref.Selector == null)\r
 179                                                 error(h,"selector must be defined before field declarations",null);\r
 180                                         XmlSchemaXPath field = XmlSchemaXPath.Read(reader,h,"field");\r
 181                                         if(field != null)\r
 182                                                 keyref.Fields.Add(field);\r
 183                                         continue;\r
 184                                 }\r
 185                                 reader.RaiseInvalidElementError();\r
 186                         }\r
 187                         return keyref;\r
 188                 }\r
 189         }\r
 190 }\r