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NBi
NBi.Core.DataSerialization.Flattening.Xml
XPathEngine

How to use XPathEngine class of NBi.Core.DataSerialization.Flattening.Xml package

Best NBi code snippet using NBi.Core.DataSerialization.Flattening.Xml.XPathEngine

XPathEngineTest.cs

Source:XPathEngineTest.cs

...33                , new ElementSelect(new LiteralScalarResolver<string>("//PurchaseOrder/Address[@Type=\"Shiping\"]/City"))34            };35            using (var reader = GetResourceReader("PurchaseOrders"))36            {37                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, string.Empty, false);38                var result = engine.Execute(reader);39                Assert.That((result.ElementAt(0) as IEnumerable<object>).Count, Is.EqualTo(3));40            }41        }42        [Test]43        [TestCase("//PurchaseOrder/Items/Item", 5)]44        [TestCase("//PurchaseOrder", 3)]45        public void Execute_Example_RowCount(string from, int rowCount)46        {47            var selects = new List<ElementSelect>()48            {49                new ElementSelect(new LiteralScalarResolver<string>("//PurchaseOrder/PurchaseOrderNumber"))50                , new AttributeSelect(new LiteralScalarResolver<string>("."),"PartNumber")51                , new ElementSelect(new LiteralScalarResolver<string>("//PurchaseOrder/Address[@Type=\"Shiping\"]/City"))52            };53            using (var reader = GetResourceReader("PurchaseOrders"))54            {55                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, string.Empty, false);56                var result = engine.Execute(reader);57                Assert.That(result.Count, Is.EqualTo(rowCount));58            }59        }60        [Test]61        public void Execute_FromElement_ValueCorrect()62        {63            var from = "//PurchaseOrder/Items/Item/ProductName";64            var selects = new List<ElementSelect>()65            {66                new ElementSelect(new LiteralScalarResolver<string>("."))67            };68            using (var reader = GetResourceReader("PurchaseOrders"))69            {70                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, string.Empty, false);71                var result = engine.Execute(reader);72                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Is.EqualTo("Lawnmower"));73            }74        }75        [Test]76        public void Execute_FromAttribute_ValueCorrect()77        {78            var from = "//PurchaseOrder/Items/Item";79            var selects = new List<ElementSelect>()80            {81                new AttributeSelect(new LiteralScalarResolver<string>("."),"PartNumber")82            };83            using (var reader = GetResourceReader("PurchaseOrders"))84            {85                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, string.Empty, false);86                var result = engine.Execute(reader);87                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Is.EqualTo("872-AA"));88            }89        }90        [Test]91        public void Execute_ChildElement_ValueCorrect()92        {93            var from = "//PurchaseOrder/Items/Item";94            var selects = new List<ElementSelect>()95            {96                new ElementSelect(new LiteralScalarResolver<string>("//PurchaseOrder/Items/Item/ProductName"))97            };98            using (var reader = GetResourceReader("PurchaseOrders"))99            {100                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, string.Empty, false);101                var result = engine.Execute(reader);102                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Is.EqualTo("Lawnmower"));103            }104        }105        [Test]106        public void Execute_ChildAttribute_ValueCorrect()107        {108            var from = "//PurchaseOrder/Items";109            var selects = new List<ElementSelect>()110            {111                new AttributeSelect(new LiteralScalarResolver<string>("//PurchaseOrder/Items/Item"),"PartNumber")112            };113            using (var reader = GetResourceReader("PurchaseOrders"))114            {115                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, string.Empty, false);116                var result = engine.Execute(reader);117                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Is.EqualTo("872-AA"));118            }119        }120        [Test]121        public void Execute_ParentElement_ValueCorrect()122        {123            var from = "//PurchaseOrder/Items/Item";124            var selects = new List<ElementSelect>()125            {126                new ElementSelect(new LiteralScalarResolver<string>("//PurchaseOrder"))127            };128            using (var reader = GetResourceReader("PurchaseOrders"))129            {130                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, string.Empty, false);131                var result = engine.Execute(reader);132                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Does.Contain("Ellen Adams"));133                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Does.Contain("Maple Street"));134            }135        }136        [Test]137        public void Execute_ParentAttribute_ValueCorrect()138        {139            var from = "//PurchaseOrder/Items/Item";140            var selects = new List<ElementSelect>()141            {142                new AttributeSelect(new LiteralScalarResolver<string>("//PurchaseOrder"),"PurchaseOrderNumber")143            };144            using (var reader = GetResourceReader("PurchaseOrders"))145            {146                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, string.Empty, false);147                var result = engine.Execute(reader);148                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Is.EqualTo("99503"));149            }150        }151        [Test]152        public void Execute_MissingElement_Null()153        {154            var from = "//PurchaseOrder/Items/Item";155            var selects = new List<ElementSelect>()156            {157                new ElementSelect(new LiteralScalarResolver<string>("//PurchaseOrder/Missing"))158            };159            using (var reader = GetResourceReader("PurchaseOrders"))160            {161                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, string.Empty, false);162                var result = engine.Execute(reader);163                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Is.EqualTo("(null)"));164            }165        }166        [Test]167        public void Execute_MissingAttribute_ValueCorrect()168        {169            var from = "//PurchaseOrder/Items/Item";170            var selects = new List<ElementSelect>()171            {172                new AttributeSelect(new LiteralScalarResolver<string>("//PurchaseOrder"), "Missing")173            };174            using (var reader = GetResourceReader("PurchaseOrders"))175            {176                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, string.Empty, false);177                var result = engine.Execute(reader);178                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Is.EqualTo("(null)"));179            }180        }181        [Test]182        public void Execute_FromElementWithDefaultNamespace_ValueCorrect()183        {184            var from = "//prefix:PurchaseOrder/prefix:Items/prefix:Item/prefix:ProductName";185            var selects = new List<ElementSelect>()186            {187                new ElementSelect(new LiteralScalarResolver<string>("."))188            };189            using (var reader = GetResourceReader("PurchaseOrdersDefaultNamespace"))190            {191                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, "prefix", false);192                var result = engine.Execute(reader);193                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Is.EqualTo("Lawnmower"));194            }195        }196        [Test]197        public void Execute_FromElementWithDefaultNamespaceAndIgnoreDefaultNamespace_ValueCorrect()198        {199            var from = "//PurchaseOrder/Items/Item/ProductName";200            var selects = new List<ElementSelect>()201            {202                new ElementSelect(new LiteralScalarResolver<string>("."))203            };204            using (var reader = GetResourceReader("PurchaseOrdersDefaultNamespace"))205            {206                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, "prefix", true);207                var result = engine.Execute(reader);208                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Is.EqualTo("Lawnmower"));209            }210        }211        [Test]212        public void Execute_FromElementWithManyNamespaces_ValueCorrect()213        {214            var from = "//prefix:PurchaseOrder/adr:Address/prefix:Street";215            var selects = new List<ElementSelect>()216            {217                new ElementSelect(new LiteralScalarResolver<string>("."))218            };219            using (var reader = GetResourceReader("PurchaseOrdersManyNamespaces"))220            {221                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, "prefix", false);222                var result = engine.Execute(reader);223                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Is.EqualTo("123 Maple Street"));224            }225        }226        [Test]227        public void Execute_FromElementWithManyNamespacesIgnoringDefaultNamespace_ValueCorrect()228        {229            var from = "//PurchaseOrder/Address/Street";230            var selects = new List<ElementSelect>()231            {232                new ElementSelect(new LiteralScalarResolver<string>("."))233            };234            using (var reader = GetResourceReader("PurchaseOrdersManyNamespaces"))235            {236                var engine = new XPathEngine(new LiteralScalarResolver<string>(from),selects, "prefix", true);237                var result = engine.Execute(reader);238                Assert.That((result.ElementAt(0) as IEnumerable<object>).ElementAt(0), Is.EqualTo("123 Maple Street"));239            }240        }241    }242}...

XPathEngine.cs

Source:XPathEngine.cs

...12using NBi.Core.ResultSet;13using NBi.Extensibility.Resolving;14namespace NBi.Core.DataSerialization.Flattening.Xml15{16    public class XPathEngine : PathFlattenizer, IDataSerializationFlattenizer17    {18        public string DefaultNamespacePrefix { get; }19        public bool IsIgnoreNamespace { get; }20        public XPathEngine(IScalarResolver<string> from, IEnumerable<IPathSelect> selects, string defaultNamespacePrefix, bool isIgnoreNamespace)21            : base(from, selects)22            => (DefaultNamespacePrefix, IsIgnoreNamespace) = (defaultNamespacePrefix, isIgnoreNamespace);23        public override IEnumerable<object> Execute(TextReader textReader)24        {25            var xmlReader = CreateReader(textReader, IsIgnoreNamespace);26            var items = XDocument.Load(xmlReader);27            var nsMgr = new XmlNamespaceManager(new NameTable());28            if (!string.IsNullOrEmpty(DefaultNamespacePrefix))29                nsMgr.AddNamespace(DefaultNamespacePrefix, items.Root.GetDefaultNamespace().NamespaceName);30            var xmlNamespaces = ((IEnumerable<object>)items.XPathEvaluate(@"//namespace::*[not(. = ../../namespace::*)]")).Cast<XAttribute>();31            foreach (var namespaceNode in xmlNamespaces)32                if (namespaceNode.Name.LocalName != "xmlns")33                    nsMgr.AddNamespace(namespaceNode.Name.LocalName, namespaceNode.Value);34            var result = from item in items.XPathSelectElements(From.Execute(), nsMgr)...

DataSerializationFlattenizerFactory.cs

Source:DataSerializationFlattenizerFactory.cs

...12        public IDataSerializationFlattenizer Instantiate(IFlattenizerArgs args)13        {14            switch (args)15            {16                case XPathArgs xpathArgs: return new XPathEngine(xpathArgs.From, xpathArgs.Selects, xpathArgs.DefaultNamespacePrefix, xpathArgs.IsIgnoreNamespace);17                case JsonPathArgs jsonPathArgs: return new JsonPathEngine(jsonPathArgs.From, jsonPathArgs.Selects);18                default: throw new ArgumentOutOfRangeException();19            }20        }21    }22}...

XPathEngine

Using AI Code Generation

1using NBi.Core.DataSerialization.Flattening.Xml;2using System.Xml;3using System.Xml.XPath;4{5    public static void Main()6    {7        XPathDocument document = new XPathDocument("books.xml");8        XPathNavigator navigator = document.CreateNavigator();9        XPathExpression expression = navigator.Compile("/bookstore/book[price>35.00]/title");10        XPathNodeIterator iterator = navigator.Select(expression);11        while (iterator.MoveNext())12        {13            Console.WriteLine(iterator.Current.Value);14        }15    }16}17boolean()18ceiling()19concat()20contains()21count()22ends-with()23floor()24format-number()25generate-id()26id()27lang()28last()29local-name()30name()31namespace-uri()32normalize-space()33not()34number()35position()36round()37starts-with()38string()39string-length()40sum()

XPathEngine

Using AI Code Generation

1var engine = new XPathEngine();2var result = engine.Evaluate("/root/child1/child2", doc);3foreach(var node in result)4{5    Console.WriteLine(node.OuterXml);6}

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