Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Xml/System/Xml/Schema/CompiledidEntityConstraint.cs

@@ -0,0 +1,83 @@
+//------------------------------------------------------------------------------
+// <copyright file="CompiledIdentityConstraint.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">[....]</owner>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Xml.Schema {
+
+    using System.Text;
+    using System.Collections;
+    using System.Diagnostics;
+    using System.Xml.XPath;
+    using MS.Internal.Xml.XPath;
+
+    internal class CompiledIdentityConstraint {
+        internal XmlQualifiedName name = XmlQualifiedName.Empty;    
+        private ConstraintRole role;
+        private Asttree selector;
+        private Asttree[] fields;
+        internal XmlQualifiedName refer = XmlQualifiedName.Empty;
+
+        public enum ConstraintRole {
+            Unique,
+            Key,
+            Keyref
+        }
+
+        public ConstraintRole Role {
+            get { return this.role; }
+        }
+
+        public Asttree Selector {
+            get { return this.selector; }
+        }
+
+        public Asttree[] Fields {
+            get { return this.fields; }
+        }
+
+        public static readonly CompiledIdentityConstraint Empty = new CompiledIdentityConstraint();
+
+        private CompiledIdentityConstraint() {}
+
+        public CompiledIdentityConstraint(XmlSchemaIdentityConstraint constraint, XmlNamespaceManager nsmgr) {
+            this.name = constraint.QualifiedName;
+
+            //public Asttree (string xPath, bool isField, XmlNamespaceManager nsmgr)
+            try {
+                this.selector = new Asttree(constraint.Selector.XPath, false, nsmgr);
+            }
+            catch (XmlSchemaException e) {
+                e.SetSource(constraint.Selector);
+                throw e;
+            }
+            XmlSchemaObjectCollection fields = constraint.Fields;
+            Debug.Assert(fields.Count > 0);
+            this.fields = new Asttree[fields.Count];
+            for(int idxField = 0; idxField < fields.Count; idxField ++) {
+                try {
+                    this.fields[idxField] = new Asttree(((XmlSchemaXPath)fields[idxField]).XPath, true, nsmgr);
+                }
+                catch (XmlSchemaException e) {
+                    e.SetSource(constraint.Fields[idxField]);
+                    throw e;
+                }
+            }
+            if (constraint is XmlSchemaUnique) {
+                this.role = ConstraintRole.Unique;
+            } 
+            else if (constraint is XmlSchemaKey) {
+                this.role = ConstraintRole.Key;
+            } 
+            else {             // XmlSchemaKeyref
+                this.role = ConstraintRole.Keyref;
+                this.refer = ((XmlSchemaKeyref)constraint).Refer; 
+            }
+        }
+    }
+
+}
+
+