从 Saxon 9.4he 中的嵌入式资源加载 xml 和 xslt

Question

我正在使用 Saxon 9.4 家庭版 (Saxon-HE 9.4 .NET) 来获得对 XSLT 2.0 和 XPath 2.0 以及 .NET 中的 XQuery 1.0 的支持。当我加载没有 URI 的文件时，我的代码崩溃了。

1. 是否可以在没有与所加载文档相关的 URI 的情况下加载 xml/xsl 文档？
2. 如果没有，有没有办法为嵌入在 dll 文件中的元素定义 URI？

任何其他解决方案也将不胜感激，我唯一的说法是文件必须从 dll 文件中加载。

只要我从文件中加载 xml/xsl，我的代码就可以完美运行：

const string sourcePath = @"C:\test\TestInvoiceWithError.xml";
const string xsltpath = @"C:\test\UBL-T10-BiiRules.xsl";

当我尝试从嵌入式资源加载时，代码会抛出异常声明'未提供基本 URI'：

Stream sourceStream = GetEmbeddedResource("TestProject1.testfiles.TestInvoice.xml");
Stream xsltStream = GetEmbeddedResource("TestProject1.testfiles.UBL-T10-BiiRules.xsl");

我还为具有引发异常的相对路径的资源创建了 Uri。'相对 URI 不支持此操作。'：

Uri sourceUri = new Uri("/TestProject1;component/testfiles/TestInvoice.xml",     UriKind.Relative);
Uri xsltUri = new Uri("/TestProject1;component/testfiles/UBL-T10-BiiRules.xsl.xml", UriKind.Relative);

这是我的代码：

using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Text;
using System.Xml;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Saxon.Api;


namespace TestProject1
{
    [TestClass]
    public class XsltTest
    {
        [TestMethod]
        public void SaxonTest()
        {
            Stream sourceStream = GetEmbeddedResource("TestProject1.testfiles.TestInvoice.xml");
            Stream xsltStream = GetEmbeddedResource("TestProject1.testfiles.UBL-T10-BiiRules.xsl");

            Uri sourceUri = new Uri("/TestProject1;component/testfiles/TestInvoice.xml", UriKind.Relative);
            Uri xsltUri = new Uri("/TestProject1;component/testfiles/UBL-T10-BiiRules.xsl.xml", UriKind.Relative);

            const string sourcePath = @"C:\test\TestInvoiceWithError.xml";
            const string xsltpath = @"C:\test\UBL-T10-BiiRules.xsl";

            Processor processor = new Processor();
            XdmNode input = processor.NewDocumentBuilder().Build(new Uri(sourcePath));

            XsltTransformer transformer = processor.NewXsltCompiler().Compile(new Uri(xsltpath)).Load();

            transformer.InitialContextNode = input;

            Serializer serializer = new Serializer();
            StringBuilder sb = new StringBuilder();
            TextWriter writer = new StringWriter(sb);
            serializer.SetOutputWriter(writer);

            transformer.Run(serializer);

            XmlDocument xmlDocOut = new XmlDocument();
            xmlDocOut.LoadXml(sb.ToString());
            XmlNodeList failedAsserts = xmlDocOut.SelectNodes("/svrl:schematron-output/svrl:failed-assert",XmlInvoiceNamespaceManager());

            if (failedAsserts == null)
                return;

            foreach (XmlNode failedAssert in failedAsserts)
            {
                if (failedAssert.Attributes == null)
                    continue;

                XmlAttribute typeOfError = failedAssert.Attributes["flag"];

                if (typeOfError.Value.Equals("warning"))
                {/*Log something*/}
                else if (typeOfError.Value.Equals("fatal"))
                {/*Log something*/}
            }
        }

        private XmlNamespaceManager XmlInvoiceNamespaceManager()
        {
            IDictionary<string, string> list = new Dictionary<string, string>
                                                   {
                                                       {"xml", "http://www.w3.org/XML/1998/namespace"},
                                                       {"xsi", "http://www.w3.org/2001/XMLSchema-instance"},
                                                       {"xsd", "http://www.w3.org/2001/XMLSchema"},
                                                       {"udt","urn:un:unece:uncefact:data:specification:UnqualifiedDataTypesSchemaModule:2"},
                                                       {"qdt","urn:oasis:names:specification:ubl:schema:xsd:QualifiedDatatypes-2"},
                                                       {"ext","urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2"},
                                                       {"ccts", "urn:un:unece:uncefact:documentation:2"},
                                                       {"cbc","urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2"},
                                                       {"cac","urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"},
                                                       {"inv", "urn:oasis:names:specification:ubl:schema:xsd:Invoice-2"},
                                                       {"svrl", "http://purl.oclc.org/dsdl/svrl"}
                                                   };

            XmlNameTable xmlNameTable = new NameTable();

            XmlNamespaceManager xmlInvoiceNamespaceManager = new XmlNamespaceManager(xmlNameTable);

            foreach (KeyValuePair<string, string> ns in list)
            {
                xmlInvoiceNamespaceManager.AddNamespace(ns.Key, ns.Value);
            }
            return xmlInvoiceNamespaceManager;
        }

        protected static Stream GetEmbeddedResource(string path)
        {
            Assembly asm = Assembly.GetExecutingAssembly();
            Stream stream = asm.GetManifestResourceStream(path);
            return stream;
        }
    }
}

Answer 1

最近，我遇到了这个问题。这是我的解决方案。

private void test() {
        Stream xsltStream = GetEmbeddedResource("TestSaxon.Resources.test.xsl");

        Processor processor = new Processor();

        DocumentBuilder db = processor.NewDocumentBuilder();
        XmlDocument xmlDocument = new XmlDocument();
        xmlDocument.Load(xsltStream);

        XdmNode xdmNode = db.Build(xmlDocument);

        XsltTransformer transformer = processor.NewXsltCompiler().Compile(xdmNode).Load();
        var path = AppDomain.CurrentDomain.BaseDirectory;
        var input = new FileInfo(path + @"\input.xml");
        var output = new FileInfo(path + @"\result.xml");
        var destination = new DomDestination();
        using (var inputStream = input.OpenRead())
        {
            transformer.SetInputStream(inputStream, new Uri(input.DirectoryName));
            transformer.Run(destination);
        }
        destination.XmlDocument.Save(output.FullName);
    }

    protected static Stream GetEmbeddedResource(string path)
    {
        Assembly asm = Assembly.GetExecutingAssembly();
        Stream stream = asm.GetManifestResourceStream(path);
        return stream;
    }

Answer 2

我认为您可以使用 Saxon 从流中加载，但您需要先设置一个基本 URI，以允许加载任何引用资源（例如 XML 文档中的 DTD 或包含或导入的样式表模块）。如果您确定没有，那么只需尝试例如

DocumentBuilder db = processor.NewDocumentBuilder();
db.BaseUri = new Uri("file:///C:/");

XdmNode input = db.Build(xsltStream);

显然，如果您需要解析 XSLT 中也将作为嵌入式资源加载的相对 URI，则需要做更多工作：您需要将 XmlResolver 设置为支持从嵌入式资源加载资源的类，与 XSLT 中的 URI 方案一起向解析器指示您需要从资源加载。我不认为 .NET 框架提供了这样一种 XmlResolver 并且 Uri 类也不支持自定义架构。