mcs/class/referencesource/System.Xml/System/Xml/Schema/CompiledidEntityConstraint.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="CompiledIdentityConstraint.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 // <owner current="true" primary="true">Microsoft</owner>
   6 //------------------------------------------------------------------------------
   7
   8 namespace System.Xml.Schema {
   9
  10     using System.Text;
  11     using System.Collections;
  12     using System.Diagnostics;
  13     using System.Xml.XPath;
  14     using MS.Internal.Xml.XPath;
  15
  16     internal class CompiledIdentityConstraint {
  17         internal XmlQualifiedName name = XmlQualifiedName.Empty;
  18         private ConstraintRole role;
  19         private Asttree selector;
  20         private Asttree[] fields;
  21         internal XmlQualifiedName refer = XmlQualifiedName.Empty;
  22
  23         public enum ConstraintRole {
  24             Unique,
  25             Key,
  26             Keyref
  27         }
  28
  29         public ConstraintRole Role {
  30             get { return this.role; }
  31         }
  32
  33         public Asttree Selector {
  34             get { return this.selector; }
  35         }
  36
  37         public Asttree[] Fields {
  38             get { return this.fields; }
  39         }
  40
  41         public static readonly CompiledIdentityConstraint Empty = new CompiledIdentityConstraint();
  42
  43         private CompiledIdentityConstraint() {}
  44
  45         public CompiledIdentityConstraint(XmlSchemaIdentityConstraint constraint, XmlNamespaceManager nsmgr) {
  46             this.name = constraint.QualifiedName;
  47
  48             //public Asttree (string xPath, bool isField, XmlNamespaceManager nsmgr)
  49             try {
  50                 this.selector = new Asttree(constraint.Selector.XPath, false, nsmgr);
  51             }
  52             catch (XmlSchemaException e) {
  53                 e.SetSource(constraint.Selector);
  54                 throw e;
  55             }
  56             XmlSchemaObjectCollection fields = constraint.Fields;
  57             Debug.Assert(fields.Count > 0);
  58             this.fields = new Asttree[fields.Count];
  59             for(int idxField = 0; idxField < fields.Count; idxField ++) {
  60                 try {
  61                     this.fields[idxField] = new Asttree(((XmlSchemaXPath)fields[idxField]).XPath, true, nsmgr);
  62                 }
  63                 catch (XmlSchemaException e) {
  64                     e.SetSource(constraint.Fields[idxField]);
  65                     throw e;
  66                 }
  67             }
  68             if (constraint is XmlSchemaUnique) {
  69                 this.role = ConstraintRole.Unique;
  70             }
  71             else if (constraint is XmlSchemaKey) {
  72                 this.role = ConstraintRole.Key;
  73             }
  74             else {             // XmlSchemaKeyref
  75                 this.role = ConstraintRole.Keyref;
  76                 this.refer = ((XmlSchemaKeyref)constraint).Refer;
  77             }
  78         }
  79     }
  80
  81 }
  82
  83