/// <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;
}
