/// <summary> /// Ctor. /// </summary> /// <param name="propertyName">property name</param> /// <param name="index">index</param> /// <param name="fragmentFactory">for creating fragments if required</param> public DOMIndexedGetter( string propertyName, int index, FragmentFactoryDOMGetter fragmentFactory) { this.propertyName = propertyName; this.index = index; this.fragmentFactory = fragmentFactory; }
/// <summary> /// Return the xPath corresponding to the given property. The PropertyName String /// may be simple, nested, indexed or mapped. /// </summary> /// <param name="propertyName">is the event property name</param> /// <param name="namespace">is the default namespace</param> /// <param name="schemaModel">is the schema model</param> /// <param name="xPathContext">is the xpath factory instance to use</param> /// <param name="rootElementName">is the name of the root element</param> /// <param name="eventBeanTypedEventFactory">for type lookup and creation</param> /// <param name="xmlEventType">the resolving type</param> /// <param name="isAllowFragment">whether fragmenting is allowed</param> /// <param name="defaultNamespace">default namespace</param> /// <returns> /// xpath expression /// </returns> /// <throws>EPException is there are XPath errors</throws> public static EventPropertyGetterSPI GetXPathResolution( string propertyName, XPathNamespaceContext xPathContext, string rootElementName, string @namespace, SchemaModel schemaModel, EventBeanTypedEventFactory eventBeanTypedEventFactory, BaseXMLEventType xmlEventType, bool isAllowFragment, string defaultNamespace) { if (Log.IsDebugEnabled) { Log.Debug("Determining XPath expression for property '" + propertyName + "'"); } var ctx = new XPathNamespaceContext(); var namespaces = schemaModel.Namespaces; string defaultNamespacePrefix = null; for (var i = 0; i < namespaces.Count; i++) { var namespacePrefix = "n" + i; ctx.AddNamespace(namespacePrefix, namespaces[i]); if (defaultNamespace != null && defaultNamespace == namespaces[i]) { defaultNamespacePrefix = namespacePrefix; } } var property = PropertyParser.ParseAndWalkLaxToSimple(propertyName); var isDynamic = property.IsDynamic; var rootComplexElement = SchemaUtil.FindRootElement(schemaModel, @namespace, rootElementName); var prefix = ctx.LookupPrefix(rootComplexElement.Namespace); if (prefix == null) { prefix = ""; } else { prefix += ':'; } var xPathBuf = new StringBuilder(); xPathBuf.Append('/'); xPathBuf.Append(prefix); if (rootElementName.StartsWith("//")) { xPathBuf.Append(rootElementName.Substring(2)); } else { xPathBuf.Append(rootElementName); } var parentComplexElement = rootComplexElement; Pair <string, XPathResultType> pair = null; if (!(property is NestedProperty)) { pair = MakeProperty(rootComplexElement, property, ctx, true, isDynamic, defaultNamespacePrefix); if (pair == null) { throw new PropertyAccessException("Failed to locate property '" + propertyName + "' in schema"); } xPathBuf.Append(pair.First); } else { var nestedProperty = (NestedProperty)property; var indexLast = nestedProperty.Properties.Count - 1; for (var i = 0; i < indexLast + 1; i++) { var isLast = i == indexLast; var propertyNested = nestedProperty.Properties[i]; pair = MakeProperty( parentComplexElement, propertyNested, ctx, isLast, isDynamic, defaultNamespacePrefix); if (pair == null) { throw new PropertyAccessException( "Failed to locate property '" + propertyName + "' nested property part '" + property.PropertyNameAtomic + "' in schema"); } var text = propertyNested.PropertyNameAtomic; var obj = SchemaUtil.FindPropertyMapping(parentComplexElement, text); if (obj is SchemaElementComplex) { parentComplexElement = (SchemaElementComplex)obj; } xPathBuf.Append(pair.First); } } var xPath = xPathBuf.ToString(); if (ExecutionPathDebugLog.IsDebugEnabled && Log.IsDebugEnabled) { Log.Debug(".parse XPath for property '" + propertyName + "' is expression=" + xPath); } // Compile assembled XPath expression if (Log.IsDebugEnabled) { Log.Debug( "Compiling XPath expression '" + xPath + "' for property '" + propertyName + "' using namespace context :" + ctx); } XPathExpression expr; try { expr = XPathExpression.Compile(xPath, ctx); } catch (XPathException e) { var detail = "Error constructing XPath expression from property expression '" + propertyName + "' expression '" + xPath + "'"; if (e.Message != null) { throw new EPException(detail + " :" + e.Message, e); } throw new EPException(detail, e); } // get type var item = property.GetPropertyTypeSchema(rootComplexElement); if (item == null && !isDynamic) { return(null); } var resultType = isDynamic ? typeof(XmlNode) : SchemaUtil.ToReturnType(item); FragmentFactory fragmentFactory = null; if (isAllowFragment) { fragmentFactory = new FragmentFactoryDOMGetter(eventBeanTypedEventFactory, xmlEventType, propertyName); } return(new XPathPropertyGetter( xmlEventType, propertyName, xPath, expr, pair.Second, resultType, fragmentFactory)); }
private EventPropertyGetterSPI DoResolvePropertyGetter( string propertyExpression, bool allowSimpleProperties) { var getter = propertyGetterCache.Get(propertyExpression); if (getter != null) { return getter; } if (!allowSimpleProperties) { // see if this is an indexed property var index = StringValue.UnescapedIndexOfDot(propertyExpression); if (index == -1) { // parse, can be an indexed property var property = PropertyParser.ParseAndWalkLaxToSimple(propertyExpression); if (!property.IsDynamic) { if (!(property is IndexedProperty)) { return null; } var indexedProp = (IndexedProperty) property; getter = propertyGetters.Get(indexedProp.PropertyNameAtomic); if (null == getter) { return null; } var descriptor = PropertyDescriptorMap.Get(indexedProp.PropertyNameAtomic); if (descriptor == null) { return null; } if (!descriptor.IsIndexed) { return null; } if (descriptor.PropertyType == typeof(XmlNodeList)) { FragmentFactorySPI fragmentFactory = new FragmentFactoryDOMGetter( EventBeanTypedEventFactory, this, indexedProp.PropertyNameAtomic); return new XPathPropertyArrayItemGetter(getter, indexedProp.Index, fragmentFactory); } else if (descriptor.PropertyType == typeof(string)) { FragmentFactorySPI fragmentFactory = new FragmentFactoryDOMGetter( EventBeanTypedEventFactory, this, indexedProp.PropertyNameAtomic); return new XPathPropertyArrayItemGetter(getter, indexedProp.Index, fragmentFactory); } } } } if (!isPropertyExpressionXPath) { var prop = PropertyParser.ParseAndWalkLaxToSimple(propertyExpression); var isDynamic = prop.IsDynamic; if (!isDynamic) { var item = prop.GetPropertyTypeSchema(schemaModelRoot); if (item == null) { return null; } getter = prop.GetGetterDOM(schemaModelRoot, EventBeanTypedEventFactory, this, propertyExpression); if (getter == null) { return null; } var returnType = SchemaUtil.ToReturnType(item); if (returnType != typeof(XmlNode) && returnType != typeof(XmlNodeList)) { if (!returnType.IsArray) { getter = new DOMConvertingGetter((DOMPropertyGetter) getter, returnType); } else { getter = new DOMConvertingArrayGetter( (DOMPropertyGetter) getter, returnType.GetElementType()); } } } else { return prop.GetterDOM; } } else { var allowFragments = !ConfigurationEventTypeXMLDOM.IsXPathPropertyExpr; getter = SchemaXMLPropertyParser.GetXPathResolution( propertyExpression, NamespaceContext, RootElementName, rootElementNamespace, SchemaModel, EventBeanTypedEventFactory, this, allowFragments, ConfigurationEventTypeXMLDOM.DefaultNamespace); } propertyGetterCache.Put(propertyExpression, getter); return getter; }