377 lines
16 KiB
C#
377 lines
16 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="XsltConvert.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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// <owner current="true" primary="true">[....]</owner>
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//------------------------------------------------------------------------------
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Xml.XPath;
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using System.Xml.Xsl;
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using System.Xml.Schema;
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using System.Diagnostics;
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using System.ComponentModel;
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namespace System.Xml.Xsl.Runtime {
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using Res = System.Xml.Utils.Res;
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/// <summary>
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/// Contains conversion routines used by Xslt. These conversions fall into several categories:
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/// 1. Internal type to internal type: These are conversions from one of the five Xslt types to another
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/// of the five types.
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/// 2. External type to internal type: These are conversions from any of the Xsd types to one of the five
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/// Xslt types.
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/// 3. Internal type to external type: These are conversions from one of the five Xslt types to any of
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/// of the Xsd types.
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/// </summary>
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[EditorBrowsable(EditorBrowsableState.Never)]
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public static class XsltConvert {
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internal static readonly Type BooleanType = typeof(bool);
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internal static readonly Type ByteArrayType = typeof(byte[]);
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internal static readonly Type ByteType = typeof(byte);
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internal static readonly Type DateTimeType = typeof(DateTime);
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internal static readonly Type DecimalType = typeof(decimal);
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internal static readonly Type DoubleType = typeof(double);
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internal static readonly Type ICollectionType = typeof(ICollection);
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internal static readonly Type IEnumerableType = typeof(IEnumerable);
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internal static readonly Type IListType = typeof(IList);
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internal static readonly Type Int16Type = typeof(short);
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internal static readonly Type Int32Type = typeof(int);
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internal static readonly Type Int64Type = typeof(long);
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internal static readonly Type IXPathNavigableType = typeof(IXPathNavigable);
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internal static readonly Type ObjectType = typeof(object);
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internal static readonly Type SByteType = typeof(sbyte);
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internal static readonly Type SingleType = typeof(float);
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internal static readonly Type StringType = typeof(string);
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internal static readonly Type TimeSpanType = typeof(TimeSpan);
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internal static readonly Type UInt16Type = typeof(ushort);
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internal static readonly Type UInt32Type = typeof(uint);
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internal static readonly Type UInt64Type = typeof(ulong);
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internal static readonly Type UriType = typeof(Uri);
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internal static readonly Type VoidType = typeof(void);
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internal static readonly Type XmlAtomicValueType = typeof(XmlAtomicValue);
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internal static readonly Type XmlQualifiedNameType = typeof(XmlQualifiedName);
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internal static readonly Type XPathItemType = typeof(XPathItem);
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internal static readonly Type XPathNavigatorArrayType = typeof(XPathNavigator[]);
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internal static readonly Type XPathNavigatorType = typeof(XPathNavigator);
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internal static readonly Type XPathNodeIteratorType = typeof(XPathNodeIterator);
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//------------------------------------------------------------------------
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// ToBoolean (internal type to internal type)
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//------------------------------------------------------------------------
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public static bool ToBoolean(XPathItem item) {
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XsltLibrary.CheckXsltValue(item);
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if (item.IsNode)
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return true;
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Type itemType = item.ValueType;
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if (itemType == StringType) {
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return item.Value.Length != 0;
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}
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else if (itemType == DoubleType) {
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// (x < 0 || 0 < x) == (x != 0) && !Double.IsNaN(x)
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double dbl = item.ValueAsDouble;
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return dbl < 0 || 0 < dbl;
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}
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else {
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Debug.Assert(itemType == BooleanType, "Unexpected type of atomic sequence " + itemType.ToString());
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return item.ValueAsBoolean;
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}
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}
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public static bool ToBoolean(IList<XPathItem> listItems) {
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XsltLibrary.CheckXsltValue(listItems);
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if (listItems.Count == 0)
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return false;
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return ToBoolean(listItems[0]);
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}
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//------------------------------------------------------------------------
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// ToDouble (internal type to internal type)
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//------------------------------------------------------------------------
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public static double ToDouble(string value) {
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return XPathConvert.StringToDouble(value);
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}
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public static double ToDouble(XPathItem item) {
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XsltLibrary.CheckXsltValue(item);
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if (item.IsNode)
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return XPathConvert.StringToDouble(item.Value);
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Type itemType = item.ValueType;
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if (itemType == StringType) {
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return XPathConvert.StringToDouble(item.Value);
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}
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else if (itemType == DoubleType) {
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return item.ValueAsDouble;
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}
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else {
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Debug.Assert(itemType == BooleanType, "Unexpected type of atomic sequence " + itemType.ToString());
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return item.ValueAsBoolean ? 1d : 0d;
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}
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}
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public static double ToDouble(IList<XPathItem> listItems) {
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XsltLibrary.CheckXsltValue(listItems);
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if (listItems.Count == 0)
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return Double.NaN;
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return ToDouble(listItems[0]);
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}
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//------------------------------------------------------------------------
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// ToNode (internal type to internal type)
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//------------------------------------------------------------------------
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public static XPathNavigator ToNode(XPathItem item) {
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XsltLibrary.CheckXsltValue(item);
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if (!item.IsNode) {
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// Create Navigator over text node containing string value of item
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XPathDocument doc = new XPathDocument();
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XmlRawWriter writer = doc.LoadFromWriter(XPathDocument.LoadFlags.AtomizeNames, string.Empty);
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writer.WriteString(ToString(item));
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writer.Close();
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return doc.CreateNavigator();
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}
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RtfNavigator rtf = item as RtfNavigator;
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if (rtf != null)
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return rtf.ToNavigator();
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return (XPathNavigator) item;
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}
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public static XPathNavigator ToNode(IList<XPathItem> listItems) {
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XsltLibrary.CheckXsltValue(listItems);
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if (listItems.Count == 1)
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return ToNode(listItems[0]);
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throw new XslTransformException(Res.Xslt_NodeSetNotNode, string.Empty);
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}
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//------------------------------------------------------------------------
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// ToNodes (internal type to internal type)
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//------------------------------------------------------------------------
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public static IList<XPathNavigator> ToNodeSet(XPathItem item) {
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return new XmlQueryNodeSequence(ToNode(item));
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}
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public static IList<XPathNavigator> ToNodeSet(IList<XPathItem> listItems) {
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XsltLibrary.CheckXsltValue(listItems);
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if (listItems.Count == 1)
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return new XmlQueryNodeSequence(ToNode(listItems[0]));
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return XmlILStorageConverter.ItemsToNavigators(listItems);
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}
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//------------------------------------------------------------------------
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// ToString (internal type to internal type)
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//------------------------------------------------------------------------
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public static string ToString(double value) {
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return XPathConvert.DoubleToString(value);
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}
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public static string ToString(XPathItem item) {
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XsltLibrary.CheckXsltValue(item);
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// Use XPath 1.0 rules to convert double to string
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if (!item.IsNode && item.ValueType == DoubleType)
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return XPathConvert.DoubleToString(item.ValueAsDouble);
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return item.Value;
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}
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public static string ToString(IList<XPathItem> listItems) {
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XsltLibrary.CheckXsltValue(listItems);
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if (listItems.Count == 0)
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return string.Empty;
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return ToString(listItems[0]);
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}
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//------------------------------------------------------------------------
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// External type to internal type
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//------------------------------------------------------------------------
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public static string ToString(DateTime value) {
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return (new XsdDateTime(value, XsdDateTimeFlags.DateTime)).ToString();
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}
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public static double ToDouble(decimal value) {
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return (double) value;
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}
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public static double ToDouble(int value) {
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return (double) value;
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}
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public static double ToDouble(long value) {
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return (double) value;
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}
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//------------------------------------------------------------------------
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// Internal type to external type
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//------------------------------------------------------------------------
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public static decimal ToDecimal(double value) {
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checked { return (decimal) value; }
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}
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public static int ToInt(double value) {
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checked { return (int) value; }
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}
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public static long ToLong(double value) {
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checked { return (long) value; }
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}
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public static DateTime ToDateTime(string value) {
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return (DateTime)(new XsdDateTime(value, XsdDateTimeFlags.AllXsd));
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}
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//------------------------------------------------------------------------
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// External type to external type
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//------------------------------------------------------------------------
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internal static XmlAtomicValue ConvertToType(XmlAtomicValue value, XmlQueryType destinationType) {
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Debug.Assert(destinationType.IsStrict && destinationType.IsAtomicValue, "Can only convert to strict atomic type.");
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// This conversion matrix should match the one in XmlILVisitor.GetXsltConvertMethod
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switch (destinationType.TypeCode) {
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case XmlTypeCode.Boolean:
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switch (value.XmlType.TypeCode) {
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case XmlTypeCode.Boolean:
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case XmlTypeCode.Double:
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case XmlTypeCode.String:
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return new XmlAtomicValue(destinationType.SchemaType, ToBoolean(value));
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}
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break;
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case XmlTypeCode.DateTime:
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if (value.XmlType.TypeCode == XmlTypeCode.String)
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return new XmlAtomicValue(destinationType.SchemaType, ToDateTime(value.Value));
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break;
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case XmlTypeCode.Decimal:
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if (value.XmlType.TypeCode == XmlTypeCode.Double)
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return new XmlAtomicValue(destinationType.SchemaType, ToDecimal(value.ValueAsDouble));
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break;
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case XmlTypeCode.Double:
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switch (value.XmlType.TypeCode) {
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case XmlTypeCode.Boolean:
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case XmlTypeCode.Double:
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case XmlTypeCode.String:
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return new XmlAtomicValue(destinationType.SchemaType, ToDouble(value));
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case XmlTypeCode.Decimal:
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return new XmlAtomicValue(destinationType.SchemaType, ToDouble((decimal) value.ValueAs(DecimalType, null)));
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case XmlTypeCode.Int:
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case XmlTypeCode.Long:
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return new XmlAtomicValue(destinationType.SchemaType, ToDouble(value.ValueAsLong));
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}
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break;
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case XmlTypeCode.Int:
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case XmlTypeCode.Long:
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if (value.XmlType.TypeCode == XmlTypeCode.Double)
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return new XmlAtomicValue(destinationType.SchemaType, ToLong(value.ValueAsDouble));
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break;
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case XmlTypeCode.String:
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switch (value.XmlType.TypeCode) {
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case XmlTypeCode.Boolean:
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case XmlTypeCode.Double:
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case XmlTypeCode.String:
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return new XmlAtomicValue(destinationType.SchemaType, ToString(value));
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case XmlTypeCode.DateTime:
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return new XmlAtomicValue(destinationType.SchemaType, ToString(value.ValueAsDateTime));
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}
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break;
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}
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Debug.Fail("Conversion from " + value.XmlType.QualifiedName.Name + " to " + destinationType + " is not supported.");
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return value;
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}
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//------------------------------------------------------------------------
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// EnsureXXX methods (TreatAs)
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//------------------------------------------------------------------------
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public static IList<XPathNavigator> EnsureNodeSet(IList<XPathItem> listItems) {
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XsltLibrary.CheckXsltValue(listItems);
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if (listItems.Count == 1) {
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XPathItem item = listItems[0];
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if (!item.IsNode)
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throw new XslTransformException(Res.XPath_NodeSetExpected, string.Empty);
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if (item is RtfNavigator)
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throw new XslTransformException(Res.XPath_RtfInPathExpr, string.Empty);
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}
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return XmlILStorageConverter.ItemsToNavigators(listItems);
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}
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//------------------------------------------------------------------------
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// InferXsltType
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//------------------------------------------------------------------------
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/// <summary>
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/// Infer one of the Xslt types from "clrType" -- Boolean, Double, String, Node, Node*, Item*.
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/// </summary>
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internal static XmlQueryType InferXsltType(Type clrType) {
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if (clrType == BooleanType) return XmlQueryTypeFactory.BooleanX;
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if (clrType == ByteType) return XmlQueryTypeFactory.DoubleX;
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if (clrType == DecimalType) return XmlQueryTypeFactory.DoubleX;
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if (clrType == DateTimeType) return XmlQueryTypeFactory.StringX;
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if (clrType == DoubleType) return XmlQueryTypeFactory.DoubleX;
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if (clrType == Int16Type) return XmlQueryTypeFactory.DoubleX;
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if (clrType == Int32Type) return XmlQueryTypeFactory.DoubleX;
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if (clrType == Int64Type) return XmlQueryTypeFactory.DoubleX;
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if (clrType == IXPathNavigableType) return XmlQueryTypeFactory.NodeNotRtf;
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if (clrType == SByteType) return XmlQueryTypeFactory.DoubleX;
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if (clrType == SingleType) return XmlQueryTypeFactory.DoubleX;
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if (clrType == StringType) return XmlQueryTypeFactory.StringX;
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if (clrType == UInt16Type) return XmlQueryTypeFactory.DoubleX;
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if (clrType == UInt32Type) return XmlQueryTypeFactory.DoubleX;
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if (clrType == UInt64Type) return XmlQueryTypeFactory.DoubleX;
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if (clrType == XPathNavigatorArrayType) return XmlQueryTypeFactory.NodeSDod;
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if (clrType == XPathNavigatorType) return XmlQueryTypeFactory.NodeNotRtf;
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if (clrType == XPathNodeIteratorType) return XmlQueryTypeFactory.NodeSDod;
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if (clrType.IsEnum) return XmlQueryTypeFactory.DoubleX;
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if (clrType == VoidType) return XmlQueryTypeFactory.Empty;
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return XmlQueryTypeFactory.ItemS;
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}
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}
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}
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