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//------------------------------------------------------------------------------
// <copyright file="XmlSchemas.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Xml.Serialization {
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System;
using System.Globalization;
using System.ComponentModel;
using System.Xml.Serialization;
using System.Xml.Schema;
using System.Diagnostics;
using System.Threading;
using System.Security.Permissions;
using System.Security.Policy;
using System.Security;
using System.Net;
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas"]/*' />
/// <internalonly/>
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public class XmlSchemas : CollectionBase, IEnumerable<XmlSchema> {
XmlSchemaSet schemaSet;
Hashtable references;
SchemaObjectCache cache; // cached schema top-level items
bool shareTypes;
Hashtable mergedSchemas;
internal Hashtable delayedSchemas = new Hashtable();
bool isCompiled = false;
static volatile XmlSchema xsd;
static volatile XmlSchema xml;
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.this"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public XmlSchema this[int index] {
get { return (XmlSchema)List[index]; }
set { List[index] = value; }
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.this1"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public XmlSchema this[string ns] {
get {
IList values = (IList)SchemaSet.Schemas(ns);
if (values.Count == 0)
return null;
if (values.Count == 1)
return (XmlSchema)values[0];
throw new InvalidOperationException(Res.GetString(Res.XmlSchemaDuplicateNamespace, ns));
}
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.GetSchemas"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public IList GetSchemas(string ns) {
return (IList)SchemaSet.Schemas(ns);
}
internal SchemaObjectCache Cache {
get {
if (cache == null)
cache = new SchemaObjectCache();
return cache;
}
}
internal Hashtable MergedSchemas {
get {
if (mergedSchemas == null)
mergedSchemas = new Hashtable();
return mergedSchemas;
}
}
internal Hashtable References {
get {
if (references == null)
references = new Hashtable();
return references;
}
}
internal XmlSchemaSet SchemaSet {
get {
if (schemaSet == null) {
schemaSet = new XmlSchemaSet();
schemaSet.XmlResolver = null;
schemaSet.ValidationEventHandler += new ValidationEventHandler(IgnoreCompileErrors);
}
return schemaSet;
}
}
internal int Add(XmlSchema schema, bool delay) {
if (delay) {
if (delayedSchemas[schema] == null)
delayedSchemas.Add(schema, schema);
return -1;
}
else {
return Add(schema);
}
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.Add"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public int Add(XmlSchema schema) {
if (List.Contains(schema))
return List.IndexOf(schema);
return List.Add(schema);
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.Add"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public int Add(XmlSchema schema, Uri baseUri) {
if (List.Contains(schema))
return List.IndexOf(schema);
if (baseUri != null)
schema.BaseUri = baseUri;
return List.Add(schema);
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.Add1"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public void Add(XmlSchemas schemas) {
foreach (XmlSchema schema in schemas) {
Add(schema);
}
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.AddReference"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public void AddReference(XmlSchema schema) {
References[schema] = schema;
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.Insert"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public void Insert(int index, XmlSchema schema) {
List.Insert(index, schema);
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.IndexOf"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public int IndexOf(XmlSchema schema) {
return List.IndexOf(schema);
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.Contains"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public bool Contains(XmlSchema schema) {
return List.Contains(schema);
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.Contains1"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public bool Contains(string targetNamespace) {
return SchemaSet.Contains(targetNamespace);
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.Remove"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public void Remove(XmlSchema schema) {
List.Remove(schema);
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.CopyTo"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public void CopyTo(XmlSchema[] array, int index) {
List.CopyTo(array, index);
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.OnInsert"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
protected override void OnInsert(int index, object value) {
AddName((XmlSchema)value);
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.OnRemove"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
protected override void OnRemove(int index, object value) {
RemoveName((XmlSchema)value);
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.OnClear"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
protected override void OnClear() {
schemaSet = null;
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.OnSet"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
protected override void OnSet(int index, object oldValue, object newValue) {
RemoveName((XmlSchema)oldValue);
AddName((XmlSchema)newValue);
}
void AddName(XmlSchema schema) {
if (isCompiled) throw new InvalidOperationException(Res.GetString(Res.XmlSchemaCompiled));
if (SchemaSet.Contains(schema))
SchemaSet.Reprocess(schema);
else {
Prepare(schema);
SchemaSet.Add(schema);
}
}
void Prepare(XmlSchema schema) {
// need to remove illegal <import> externals;
ArrayList removes = new ArrayList();
string ns = schema.TargetNamespace;
foreach (XmlSchemaExternal external in schema.Includes) {
if (external is XmlSchemaImport) {
if (ns == ((XmlSchemaImport)external).Namespace) {
removes.Add(external);
}
}
}
foreach(XmlSchemaObject o in removes) {
schema.Includes.Remove(o);
}
}
void RemoveName(XmlSchema schema) {
SchemaSet.Remove(schema);
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.Find"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public object Find(XmlQualifiedName name, Type type) {
return Find(name, type, true);
}
internal object Find(XmlQualifiedName name, Type type, bool checkCache) {
if (!IsCompiled) {
foreach (XmlSchema schema in List) {
Preprocess(schema);
}
}
IList values = (IList)SchemaSet.Schemas(name.Namespace);
if (values == null) return null;
foreach (XmlSchema schema in values) {
Preprocess(schema);
XmlSchemaObject ret = null;
if (typeof(XmlSchemaType).IsAssignableFrom(type)) {
ret = schema.SchemaTypes[name];
if (ret == null || !type.IsAssignableFrom(ret.GetType())) {
continue;
}
}
else if (type == typeof(XmlSchemaGroup)) {
ret = schema.Groups[name];
}
else if (type == typeof(XmlSchemaAttributeGroup)) {
ret = schema.AttributeGroups[name];
}
else if (type == typeof(XmlSchemaElement)) {
ret = schema.Elements[name];
}
else if (type == typeof(XmlSchemaAttribute)) {
ret = schema.Attributes[name];
}
else if (type == typeof(XmlSchemaNotation)) {
ret = schema.Notations[name];
}
#if DEBUG
else {
// use exception in the place of Debug.Assert to avoid throwing asserts from a server process such as aspnet_ewp.exe
throw new InvalidOperationException(Res.GetString(Res.XmlInternalErrorDetails, "XmlSchemas.Find: Invalid object type " + type.FullName));
}
#endif
if (ret != null && shareTypes && checkCache && !IsReference(ret))
ret = Cache.AddItem(ret, name, this);
if (ret != null) {
return ret;
}
}
return null;
}
IEnumerator<XmlSchema> IEnumerable<XmlSchema>.GetEnumerator() {
return new XmlSchemaEnumerator(this);
}
internal static void Preprocess(XmlSchema schema) {
if (!schema.IsPreprocessed) {
try {
XmlNameTable nameTable = new System.Xml.NameTable();
Preprocessor prep = new Preprocessor(nameTable, new SchemaNames(nameTable), null);
prep.SchemaLocations = new Hashtable();
prep.Execute(schema, schema.TargetNamespace, false);
}
catch(XmlSchemaException e) {
throw CreateValidationException(e, e.Message);
}
}
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.IsDataSet"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public static bool IsDataSet(XmlSchema schema) {
foreach (XmlSchemaObject o in schema.Items) {
if (o is XmlSchemaElement) {
XmlSchemaElement e = (XmlSchemaElement)o;
if (e.UnhandledAttributes != null) {
foreach (XmlAttribute a in e.UnhandledAttributes) {
if (a.LocalName == "IsDataSet" && a.NamespaceURI == "urn:schemas-microsoft-com:xml-msdata") {
// currently the msdata:IsDataSet uses its own format for the boolean values
if (a.Value == "True" || a.Value == "true" || a.Value == "1") return true;
}
}
}
}
}
return false;
}
void Merge(XmlSchema schema) {
if (MergedSchemas[schema] != null)
return;
IList originals = (IList)SchemaSet.Schemas(schema.TargetNamespace);
if (originals != null && originals.Count > 0) {
MergedSchemas.Add(schema, schema);
Merge(originals, schema);
}
else {
Add(schema);
MergedSchemas.Add(schema, schema);
}
}
void AddImport(IList schemas, string ns) {
foreach(XmlSchema s in schemas) {
bool add = true;
foreach (XmlSchemaExternal external in s.Includes) {
if (external is XmlSchemaImport && ((XmlSchemaImport)external).Namespace == ns) {
add = false;
break;
}
}
if (add) {
XmlSchemaImport import = new XmlSchemaImport();
import.Namespace = ns;
s.Includes.Add(import);
}
}
}
void Merge(IList originals, XmlSchema schema) {
foreach (XmlSchema s in originals) {
if (schema == s) {
return;
}
}
foreach (XmlSchemaExternal external in schema.Includes) {
if (external is XmlSchemaImport) {
external.SchemaLocation = null;
if (external.Schema != null) {
Merge(external.Schema);
}
else {
AddImport(originals, ((XmlSchemaImport)external).Namespace);
}
}
else {
if (external.Schema == null) {
// we do not process includes or redefines by the schemaLocation
if (external.SchemaLocation != null) {
throw new InvalidOperationException(Res.GetString(Res.XmlSchemaIncludeLocation, this.GetType().Name, external.SchemaLocation));
}
}
else {
external.SchemaLocation = null;
Merge(originals, external.Schema);
}
}
}
// bring all included items to the parent schema;
bool[] matchedItems = new bool[schema.Items.Count];
int count = 0;
for (int i = 0; i < schema.Items.Count; i++) {
XmlSchemaObject o = schema.Items[i];
XmlSchemaObject dest = Find(o, originals);
if (dest != null) {
if (!Cache.Match(dest, o, shareTypes)) {
//
Debug.WriteLineIf(DiagnosticsSwitches.XmlSerialization.TraceVerbose, "XmlSerialization::Failed to Merge " + MergeFailedMessage(o, dest, schema.TargetNamespace)
+ "' Plase Compare hash:\r\n" + Cache.looks[dest] + "\r\n" + Cache.looks[o]);
throw new InvalidOperationException(MergeFailedMessage(o, dest, schema.TargetNamespace));
}
matchedItems[i] = true;
count++;
}
}
if (count != schema.Items.Count) {
XmlSchema destination = (XmlSchema)originals[0];
for (int i = 0; i < schema.Items.Count; i++) {
if (!matchedItems[i]) {
destination.Items.Add(schema.Items[i]);
}
}
destination.IsPreprocessed = false;
Preprocess(destination);
}
}
static string ItemName(XmlSchemaObject o) {
if (o is XmlSchemaNotation) {
return ((XmlSchemaNotation)o).Name;
}
else if (o is XmlSchemaGroup) {
return ((XmlSchemaGroup)o).Name;
}
else if (o is XmlSchemaElement) {
return ((XmlSchemaElement)o).Name;
}
else if (o is XmlSchemaType) {
return ((XmlSchemaType)o).Name;
}
else if (o is XmlSchemaAttributeGroup) {
return ((XmlSchemaAttributeGroup)o).Name;
}
else if (o is XmlSchemaAttribute) {
return ((XmlSchemaAttribute)o).Name;
}
return null;
}
internal static XmlQualifiedName GetParentName(XmlSchemaObject item) {
while (item.Parent != null) {
if (item.Parent is XmlSchemaType) {
XmlSchemaType type = (XmlSchemaType)item.Parent;
if (type.Name != null && type.Name.Length != 0) {
return type.QualifiedName;
}
}
item = item.Parent;
}
return XmlQualifiedName.Empty;
}
static string GetSchemaItem(XmlSchemaObject o, string ns, string details) {
if (o == null) {
return null;
}
while (o.Parent != null && !(o.Parent is XmlSchema)) {
o = o.Parent;
}
if (ns == null || ns.Length == 0) {
XmlSchemaObject tmp = o;
while (tmp.Parent != null) {
tmp = tmp.Parent;
}
if (tmp is XmlSchema) {
ns = ((XmlSchema)tmp).TargetNamespace;
}
}
string item = null;
if (o is XmlSchemaNotation) {
item = Res.GetString(Res.XmlSchemaNamedItem, ns, "notation", ((XmlSchemaNotation)o).Name, details);
}
else if (o is XmlSchemaGroup) {
item = Res.GetString(Res.XmlSchemaNamedItem, ns, "group", ((XmlSchemaGroup)o).Name, details);
}
else if (o is XmlSchemaElement) {
XmlSchemaElement e = ((XmlSchemaElement)o);
if (e.Name == null || e.Name.Length == 0) {
XmlQualifiedName parentName = XmlSchemas.GetParentName(o);
// Element reference '{0}' declared in schema type '{1}' from namespace '{2}'
item = Res.GetString(Res.XmlSchemaElementReference, e.RefName.ToString(), parentName.Name, parentName.Namespace);
}
else {
item = Res.GetString(Res.XmlSchemaNamedItem, ns, "element", e.Name, details);
}
}
else if (o is XmlSchemaType) {
item = Res.GetString(Res.XmlSchemaNamedItem, ns, o.GetType() == typeof(XmlSchemaSimpleType) ? "simpleType" : "complexType", ((XmlSchemaType)o).Name, null);
}
else if (o is XmlSchemaAttributeGroup) {
item = Res.GetString(Res.XmlSchemaNamedItem, ns, "attributeGroup", ((XmlSchemaAttributeGroup)o).Name, details);
}
else if (o is XmlSchemaAttribute) {
XmlSchemaAttribute a = ((XmlSchemaAttribute)o);
if (a.Name == null || a.Name.Length == 0) {
XmlQualifiedName parentName = XmlSchemas.GetParentName(o);
// Attribure reference '{0}' declared in schema type '{1}' from namespace '{2}'
return Res.GetString(Res.XmlSchemaAttributeReference, a.RefName.ToString(), parentName.Name, parentName.Namespace);
}
else {
item = Res.GetString(Res.XmlSchemaNamedItem, ns, "attribute", a.Name, details);
}
}
else if (o is XmlSchemaContent) {
XmlQualifiedName parentName = XmlSchemas.GetParentName(o);
// Check content definition of schema type '{0}' from namespace '{1}'. {2}
item = Res.GetString(Res.XmlSchemaContentDef, parentName.Name, parentName.Namespace, null);
}
else if (o is XmlSchemaExternal) {
string itemType = o is XmlSchemaImport ? "import" : o is XmlSchemaInclude ? "include" : o is XmlSchemaRedefine ? "redefine" : o.GetType().Name;
item = Res.GetString(Res.XmlSchemaItem, ns, itemType, details);
}
else if (o is XmlSchema) {
item = Res.GetString(Res.XmlSchema, ns, details);
}
else {
item = Res.GetString(Res.XmlSchemaNamedItem, ns, o.GetType().Name, null, details);
}
return item;
}
static string Dump(XmlSchemaObject o) {
XmlWriterSettings settings = new XmlWriterSettings();
settings.OmitXmlDeclaration = true;
settings.Indent = true;
XmlSerializer s = new XmlSerializer(o.GetType());
StringWriter sw = new StringWriter(CultureInfo.InvariantCulture);
XmlWriter xmlWriter = XmlWriter.Create(sw, settings);
XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
ns.Add("xs", XmlSchema.Namespace);
s.Serialize(xmlWriter, o, ns);
return sw.ToString();
}
static string MergeFailedMessage(XmlSchemaObject src, XmlSchemaObject dest, string ns) {
string err = Res.GetString(Res.XmlSerializableMergeItem, ns, GetSchemaItem(src, ns, null));
err += "\r\n" + Dump(src);
err += "\r\n" + Dump(dest);
return err;
}
internal XmlSchemaObject Find(XmlSchemaObject o, IList originals) {
string name = ItemName(o);
if (name == null)
return null;
Type type = o.GetType();
foreach (XmlSchema s in originals) {
foreach(XmlSchemaObject item in s.Items) {
if (item.GetType() == type && name == ItemName(item)) {
return item;
}
}
}
return null;
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.IsCompiled"]/*' />
public bool IsCompiled {
get { return isCompiled; }
}
/// <include file='doc\XmlSchemas.uex' path='docs/doc[@for="XmlSchemas.Compile"]/*' />
public void Compile(ValidationEventHandler handler, bool fullCompile) {
if (isCompiled)
return;
foreach(XmlSchema s in delayedSchemas.Values)
Merge(s);
delayedSchemas.Clear();
if (fullCompile) {
schemaSet = new XmlSchemaSet();
schemaSet.XmlResolver = null;
schemaSet.ValidationEventHandler += handler;
foreach (XmlSchema s in References.Values)
schemaSet.Add(s);
int schemaCount = schemaSet.Count;
foreach (XmlSchema s in List) {
if (!SchemaSet.Contains(s)) {
schemaSet.Add(s);
schemaCount++;
}
}
if (!SchemaSet.Contains(XmlSchema.Namespace)) {
AddReference(XsdSchema);
schemaSet.Add(XsdSchema);
schemaCount++;
}
if (!SchemaSet.Contains(XmlReservedNs.NsXml)) {
AddReference(XmlSchema);
schemaSet.Add(XmlSchema);
schemaCount++;
}
schemaSet.Compile();
schemaSet.ValidationEventHandler -= handler;
isCompiled = schemaSet.IsCompiled && schemaCount == schemaSet.Count;
}
else {
try {
XmlNameTable nameTable = new System.Xml.NameTable();
Preprocessor prep = new Preprocessor(nameTable, new SchemaNames(nameTable), null);
prep.XmlResolver = null;
prep.SchemaLocations = new Hashtable();
prep.ChameleonSchemas = new Hashtable();
foreach (XmlSchema schema in SchemaSet.Schemas()) {
prep.Execute(schema, schema.TargetNamespace, true);
}
}
catch(XmlSchemaException e) {
throw CreateValidationException(e, e.Message);
}
}
}
internal static Exception CreateValidationException(XmlSchemaException exception, string message) {
XmlSchemaObject source = exception.SourceSchemaObject;
if (exception.LineNumber == 0 && exception.LinePosition == 0) {
throw new InvalidOperationException(GetSchemaItem(source, null, message), exception);
}
else {
string ns = null;
if (source != null) {
while (source.Parent != null) {
source = source.Parent;
}
if (source is XmlSchema) {
ns = ((XmlSchema)source).TargetNamespace;
}
}
throw new InvalidOperationException(Res.GetString(Res.XmlSchemaSyntaxErrorDetails, ns, message, exception.LineNumber, exception.LinePosition), exception);
}
}
internal static void IgnoreCompileErrors(object sender, ValidationEventArgs args) {
return;
}
internal static XmlSchema XsdSchema {
get {
if (xsd == null) {
xsd = CreateFakeXsdSchema(XmlSchema.Namespace, "schema");
}
return xsd;
}
}
internal static XmlSchema XmlSchema {
get {
if (xml == null) {
xml = XmlSchema.Read(new StringReader(xmlSchema), null);
}
return xml;
}
}
private static XmlSchema CreateFakeXsdSchema(string ns, string name) {
/* Create fake xsd schema to fool the XmlSchema.Compiler
<xsd:schema targetNamespace="http://www.w3.org/2001/XMLSchema" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="schema">
<xsd:complexType />
</xsd:element>
</xsd:schema>
*/
XmlSchema schema = new XmlSchema();
schema.TargetNamespace = ns;
XmlSchemaElement element = new XmlSchemaElement();
element.Name = name;
XmlSchemaComplexType type = new XmlSchemaComplexType();
element.SchemaType = type;
schema.Items.Add(element);
return schema;
}
internal void SetCache(SchemaObjectCache cache, bool shareTypes) {
this.shareTypes = shareTypes;
this.cache = cache;
if (shareTypes) {
cache.GenerateSchemaGraph(this);
}
}
internal bool IsReference(XmlSchemaObject type) {
XmlSchemaObject parent = type;
while (parent.Parent != null) {
parent = parent.Parent;
}
return References.Contains(parent);
}
internal const string xmlSchema = @"<?xml version='1.0' encoding='UTF-8' ?>
<xs:schema targetNamespace='http://www.w3.org/XML/1998/namespace' xmlns:xs='http://www.w3.org/2001/XMLSchema' xml:lang='en'>
<xs:attribute name='lang' type='xs:language'/>
<xs:attribute name='space'>
<xs:simpleType>
<xs:restriction base='xs:NCName'>
<xs:enumeration value='default'/>
<xs:enumeration value='preserve'/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute name='base' type='xs:anyURI'/>
<xs:attribute name='id' type='xs:ID' />
<xs:attributeGroup name='specialAttrs'>
<xs:attribute ref='xml:base'/>
<xs:attribute ref='xml:lang'/>
<xs:attribute ref='xml:space'/>
</xs:attributeGroup>
</xs:schema>";
}
public class XmlSchemaEnumerator : IEnumerator<XmlSchema>, System.Collections.IEnumerator {
private XmlSchemas list;
private int idx, end;
public XmlSchemaEnumerator(XmlSchemas list) {
this.list = list;
this.idx = -1;
this.end = list.Count - 1;
}
public void Dispose() {
}
public bool MoveNext() {
if (this.idx >= this.end)
return false;
this.idx++;
return true;
}
public XmlSchema Current {
get { return this.list[this.idx]; }
}
object System.Collections.IEnumerator.Current {
get { return this.list[this.idx]; }
}
void System.Collections.IEnumerator.Reset() {
this.idx = -1;
}
}
}
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