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

   1 // Author: Dwivedi, Ajay kumar
   2 //            Adwiv@Yahoo.com
   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;
  25 using System.Collections;
  26 using System.Xml;
  27 using System.Xml.Serialization;
  28 using Mono.Xml.Schema;
  29
  30 namespace System.Xml.Schema
  31 {
  32         /// <summary>
  33         /// Summary description for XmlSchemaIdentityConstraint.
  34         /// </summary>
  35         public class XmlSchemaIdentityConstraint : XmlSchemaAnnotated
  36         {
  37                 private XmlSchemaObjectCollection fields;
  38                 private string name;
  39                 private XmlQualifiedName qName;
  40                 private XmlSchemaXPath selector;
  41
  42                 private XsdIdentitySelector compiledSelector;
  43 //              ArrayList compiledFields;
  44
  45                 public XmlSchemaIdentityConstraint()
  46                 {
  47                         fields = new XmlSchemaObjectCollection();
  48                         qName = XmlQualifiedName.Empty;
  49                 }
  50
  51                 [System.Xml.Serialization.XmlAttribute("name")]
  52                 public string Name
  53                 {
  54                         get{ return  name; }
  55                         set{ name = value; }
  56                 }
  57
  58                 [XmlElement("selector",typeof(XmlSchemaXPath),Namespace=XmlSchema.Namespace)]
  59                 public XmlSchemaXPath Selector
  60                 {
  61                         get{ return  selector; }
  62                         set{ selector = value; }
  63                 }
  64
  65                 [XmlElement("field",typeof(XmlSchemaXPath),Namespace=XmlSchema.Namespace)]
  66                 public XmlSchemaObjectCollection Fields
  67                 {
  68                         get{ return fields; }
  69                 }
  70
  71                 [XmlIgnore]
  72                 public XmlQualifiedName QualifiedName
  73                 {
  74                         get{ return  qName; }
  75                 }
  76
  77                 internal XsdIdentitySelector CompiledSelector {
  78                         get { return compiledSelector; }
  79                 }
  80
  81                 /// <remarks>
  82                 /// 1. name must be present
  83                 /// 2. selector and field must be present
  84                 /// </remarks>
  85                 internal override int Compile(ValidationEventHandler h, XmlSchema schema)
  86                 {
  87                         // If this is already compiled this time, simply skip.
  88                         if (this.IsComplied (schema.CompilationId))
  89                                 return 0;
  90
  91                         if(Name == null)
  92                                 error(h,"Required attribute name must be present");
  93                         else if(!XmlSchemaUtil.CheckNCName(this.name))
  94                                 error(h,"attribute name must be NCName");
  95                         else {
  96                                 this.qName = new XmlQualifiedName(Name,schema.TargetNamespace);
  97                                 if (schema.NamedIdentities.Contains (qName))
  98                                         error(h,"There is already same named identity constraint in this namespace.");
  99                                 else
 100                                         schema.NamedIdentities.Add (qName, this);
 101                         }
 102
 103                         if(Selector == null)
 104                                 error(h,"selector must be present");
 105                         else
 106                         {
 107                                 Selector.isSelector = true;
 108                                 errorCount += Selector.Compile(h,schema);
 109                                 if (selector.errorCount == 0)
 110                                         compiledSelector = new XsdIdentitySelector (Selector);
 111                         }
 112                         if (errorCount > 0)
 113                                 return errorCount; // fatal
 114
 115                         if(Fields.Count == 0)
 116                                 error(h,"atleast one field value must be present");
 117                         else
 118                         {
 119                                 for (int i = 0; i < Fields.Count; i++)
 120                                 {
 121                                         XmlSchemaXPath field = Fields [i] as XmlSchemaXPath;
 122                                         if(field != null)
 123                                         {
 124                                                 errorCount += field.Compile(h,schema);
 125                                                 if (field.errorCount == 0)
 126                                                         this.compiledSelector.AddField (new XsdIdentityField (field, i));
 127                                         }
 128                                         else
 129                                                 error (h, "Object of type " + Fields [i].GetType() + " is invalid in the Fields Collection");
 130                                 }
 131                         }
 132                         XmlSchemaUtil.CompileID(Id,this,schema.IDCollection,h);
 133
 134                         this.CompilationId = schema.CompilationId;
 135                         return errorCount;
 136                 }
 137         }
 138 }