/**
* Ctor.
*
* @param configurationEventTypeXMLDOM is the XML DOM configuration such as root element and
* schema names
* @param metadata event type metadata
* @param eventAdapterService for registration and lookup of types
*/
public BaseXMLEventType(
EventTypeMetadata metadata,
int eventTypeId,
ConfigurationEventTypeXMLDOM configurationEventTypeXMLDOM,
EventAdapterService eventAdapterService) {
super(eventAdapterService, metadata, eventTypeId, Node.class);
this.rootElementName = configurationEventTypeXMLDOM.getRootElementName();
this.configurationEventTypeXMLDOM = configurationEventTypeXMLDOM;
xPathFactory = XPathFactory.newInstance();
if (configurationEventTypeXMLDOM.getXPathFunctionResolver() != null) {
try {
XPathFunctionResolver fresolver =
(XPathFunctionResolver)
JavaClassHelper.instantiate(
XPathFunctionResolver.class,
configurationEventTypeXMLDOM.getXPathFunctionResolver());
xPathFactory.setXPathFunctionResolver(fresolver);
} catch (ClassInstantiationException ex) {
throw new ConfigurationException(
"Error configuring XPath function resolver for XML type '"
+ configurationEventTypeXMLDOM.getRootElementName()
+ "' : "
+ ex.getMessage(),
ex);
}
}
if (configurationEventTypeXMLDOM.getXPathVariableResolver() != null) {
try {
XPathVariableResolver vresolver =
(XPathVariableResolver)
JavaClassHelper.instantiate(
XPathVariableResolver.class,
configurationEventTypeXMLDOM.getXPathVariableResolver());
xPathFactory.setXPathVariableResolver(vresolver);
} catch (ClassInstantiationException ex) {
throw new ConfigurationException(
"Error configuring XPath variable resolver for XML type '"
+ configurationEventTypeXMLDOM.getRootElementName()
+ "' : "
+ ex.getMessage(),
ex);
}
}
}
/**
* Set the preconfigured event properties resolved by XPath expression.
*
* @param explicitXPathProperties are preconfigured event properties
* @param additionalSchemaProperties the explicit properties
*/
protected void initialize(
Collection<ConfigurationEventTypeXMLDOM.XPathPropertyDesc> explicitXPathProperties,
List<ExplicitPropertyDescriptor> additionalSchemaProperties) {
// make sure we override those explicitly provided with those derived from a metadataz
Map<String, ExplicitPropertyDescriptor> namedProperties =
new LinkedHashMap<String, ExplicitPropertyDescriptor>();
for (ExplicitPropertyDescriptor desc : additionalSchemaProperties) {
namedProperties.put(desc.getDescriptor().getPropertyName(), desc);
}
String xpathExpression = null;
try {
for (ConfigurationEventTypeXMLDOM.XPathPropertyDesc property : explicitXPathProperties) {
XPath xPath = xPathFactory.newXPath();
if (namespaceContext != null) {
xPath.setNamespaceContext(namespaceContext);
}
xpathExpression = property.getXpath();
if (log.isInfoEnabled()) {
log.info(
"Compiling XPath expression for property '"
+ property.getName()
+ "' as '"
+ xpathExpression
+ "'");
}
XPathExpression expression = xPath.compile(xpathExpression);
FragmentFactoryXPathPredefinedGetter fragmentFactory = null;
boolean isFragment = false;
if (property.getOptionaleventTypeName() != null) {
fragmentFactory =
new FragmentFactoryXPathPredefinedGetter(
this.getEventAdapterService(),
property.getOptionaleventTypeName(),
property.getName());
isFragment = true;
}
boolean isArray = false;
if (property.getType().equals(XPathConstants.NODESET)) {
isArray = true;
}
EventPropertyGetter getter =
new XPathPropertyGetter(
property.getName(),
xpathExpression,
expression,
property.getType(),
property.getOptionalCastToType(),
fragmentFactory);
Class returnType =
SchemaUtil.toReturnType(property.getType(), property.getOptionalCastToType());
EventPropertyDescriptor desc =
new EventPropertyDescriptor(
property.getName(), returnType, null, false, false, isArray, false, isFragment);
ExplicitPropertyDescriptor explicit =
new ExplicitPropertyDescriptor(
desc, getter, isArray, property.getOptionaleventTypeName());
namedProperties.put(desc.getPropertyName(), explicit);
}
} catch (XPathExpressionException ex) {
throw new EPException(
"XPath expression could not be compiled for expression '" + xpathExpression + '\'', ex);
}
super.initialize(new ArrayList<ExplicitPropertyDescriptor>(namedProperties.values()));
// evaluate start and end timestamp properties if any
startTimestampPropertyName = configurationEventTypeXMLDOM.getStartTimestampPropertyName();
endTimestampPropertyName = configurationEventTypeXMLDOM.getEndTimestampPropertyName();
EventTypeUtility.validateTimestampProperties(
this, startTimestampPropertyName, endTimestampPropertyName);
}