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

   1 // Author: Dwivedi, Ajay kumar\r
   2 //            Adwiv@Yahoo.com\r
   3 using System;\r
   4 using System.Collections;\r
   5 using System.Xml;\r
   6 using System.Xml.Serialization;\r
   7 using Mono.Xml.Schema;\r
   8 \r
   9 namespace System.Xml.Schema\r
  10 {\r
  11         /// <summary>\r
  12         /// Summary description for XmlSchemaIdentityConstraint.\r
  13         /// </summary>\r
  14         public class XmlSchemaIdentityConstraint : XmlSchemaAnnotated\r
  15         {\r
  16                 private XmlSchemaObjectCollection fields;\r
  17                 private string name;\r
  18                 private XmlQualifiedName qName;\r
  19                 private XmlSchemaXPath selector;\r
  20 \r
  21                 private XsdIdentitySelector compiledSelector;\r
  22 //              ArrayList compiledFields;\r
  23 \r
  24                 public XmlSchemaIdentityConstraint()\r
  25                 {\r
  26                         fields = new XmlSchemaObjectCollection();\r
  27                         qName = XmlQualifiedName.Empty;\r
  28                 }\r
  29                 \r
  30                 [System.Xml.Serialization.XmlAttribute("name")]\r
  31                 public string Name \r
  32                 {\r
  33                         get{ return  name; } \r
  34                         set{ name = value; }\r
  35                 }\r
  36 \r
  37                 [XmlElement("selector",typeof(XmlSchemaXPath),Namespace=XmlSchema.Namespace)]\r
  38                 public XmlSchemaXPath Selector \r
  39                 {\r
  40                         get{ return  selector; } \r
  41                         set{ selector = value; }\r
  42                 }\r
  43 \r
  44                 [XmlElement("field",typeof(XmlSchemaXPath),Namespace=XmlSchema.Namespace)]\r
  45                 public XmlSchemaObjectCollection Fields \r
  46                 {\r
  47                         get{ return fields; }\r
  48                 }\r
  49                 \r
  50                 [XmlIgnore]\r
  51                 public XmlQualifiedName QualifiedName \r
  52                 {\r
  53                         get{ return  qName; }\r
  54                 }\r
  55 \r
  56                 internal XsdIdentitySelector CompiledSelector {\r
  57                         get { return compiledSelector; }\r
  58                 }\r
  59 \r
  60                 /// <remarks>\r
  61                 /// 1. name must be present\r
  62                 /// 2. selector and field must be present\r
  63                 /// </remarks>\r
  64                 internal override int Compile(ValidationEventHandler h, XmlSchema schema)\r
  65                 {\r
  66                         // If this is already compiled this time, simply skip.\r
  67                         if (this.IsComplied (schema.CompilationId))\r
  68                                 return 0;\r
  69 \r
  70                         if(Name == null)\r
  71                                 error(h,"Required attribute name must be present");\r
  72                         else if(!XmlSchemaUtil.CheckNCName(this.name)) \r
  73                                 error(h,"attribute name must be NCName");\r
  74                         else {\r
  75                                 this.qName = new XmlQualifiedName(Name,schema.TargetNamespace);\r
  76                                 if (schema.NamedIdentities.Contains (qName))\r
  77                                         error(h,"There is already same named identity constraint in this namespace.");\r
  78                                 else\r
  79                                         schema.NamedIdentities.Add (qName, this);\r
  80                         }\r
  81 \r
  82                         if(Selector == null)\r
  83                                 error(h,"selector must be present");\r
  84                         else\r
  85                         {\r
  86                                 Selector.isSelector = true;\r
  87                                 errorCount += Selector.Compile(h,schema);\r
  88                                 if (selector.errorCount == 0)\r
  89                                         compiledSelector = new XsdIdentitySelector (Selector);\r
  90                         }\r
  91                         if (errorCount > 0)\r
  92                                 return errorCount; // fatal\r
  93 \r
  94                         if(Fields.Count == 0)\r
  95                                 error(h,"atleast one field value must be present");\r
  96                         else\r
  97                         {\r
  98                                 for (int i = 0; i < Fields.Count; i++)\r
  99                                 {\r
 100                                         XmlSchemaXPath field = Fields [i] as XmlSchemaXPath;\r
 101                                         if(field != null)\r
 102                                         {\r
 103                                                 errorCount += field.Compile(h,schema);\r
 104                                                 if (field.errorCount == 0)\r
 105                                                         this.compiledSelector.AddField (new XsdIdentityField (field, i));\r
 106                                         }\r
 107                                         else\r
 108                                                 error (h, "Object of type " + Fields [i].GetType() + " is invalid in the Fields Collection");\r
 109                                 }\r
 110                         }\r
 111                         XmlSchemaUtil.CompileID(Id,this,schema.IDCollection,h);\r
 112 \r
 113                         this.CompilationId = schema.CompilationId;\r
 114                         return errorCount;\r
 115                 }\r
 116         }\r
 117 }\r