/**
* Proxy to {@link OdeRTInstanceContext#initializeVariable(Variable, Node)} then write properties.
*/
public Node initializeVariable(VariableInstance var, ScopeFrame scopeFrame, Node val)
throws ExternalVariableModuleException {
try {
if (var.declaration.extVar != null) /* external variable */ {
if (__log.isDebugEnabled())
__log.debug(
"Initialize external variable: name="
+ var.declaration
+ " value="
+ DOMUtils.domToString(val));
Node reference = null;
try {
reference = fetchVariableData(var, scopeFrame, true);
} catch (FaultException fe) {
// In this context this is not necessarily a problem, since the assignment may re-init the
// related var
}
if (reference != null) val = _brc.readExtVar(var, reference);
return val;
} else /* normal variable */ {
if (__log.isDebugEnabled())
__log.debug(
"Initialize variable: name="
+ var.declaration
+ " value="
+ DOMUtils.domToString(val));
return _brc.initializeVariable(var, val);
}
} finally {
writeProperties(var, val);
}
}
public void commitChanges(VariableInstance var, ScopeFrame scopeFrame, Node value)
throws ExternalVariableModuleException {
if (var.declaration.extVar != null) /* external variable */ {
if (__log.isDebugEnabled())
__log.debug(
"Write external variable: name="
+ var.declaration
+ " value="
+ DOMUtils.domToString(value));
VariableInstance related = scopeFrame.resolve(var.declaration.extVar.related);
Node reference = null;
try {
reference = fetchVariableData(var, scopeFrame, true);
} catch (FaultException fe) {
// In this context this is not necessarily a problem, since the assignment may re-init the
// related var
}
VariableContext.ValueReferencePair vrp = _brc.writeExtVar(var, reference, value);
commitChanges(related, scopeFrame, vrp.reference);
} else /* normal variable */ {
if (__log.isDebugEnabled())
__log.debug(
"Write variable: name=" + var.declaration + " value=" + DOMUtils.domToString(value));
_brc.commitChanges(var, value);
}
writeProperties(var, value);
}
/**
* Returns a {@link XMLSchemaType}
*
* @see javax.wsdl.extensions.ExtensionDeserializer#unmarshall(java.lang.Class,
* javax.xml.namespace.QName, org.w3c.dom.Element, javax.wsdl.Definition,
* javax.wsdl.extensions.ExtensionRegistry)
*/
public ExtensibilityElement unmarshall(
Class clazz,
QName qname,
Element element,
Definition definition,
ExtensionRegistry extensionRegistry)
throws WSDLException {
DOMUtils.pancakeNamespaces(element);
return new XMLSchemaType(DOMUtils.domToString(element));
}
/**
* Get Variable data for the given variable name, for this scope instance
*
* @param varName Variable Name
* @return DOM Node as XML String. If no value exists or variable not initialized, NULL will be
* returnrd.
*/
public String getVariableData(String varName) {
String value = null;
try {
OScope.Variable var = __scope.getVisibleVariable(varName);
VariableInstance varInstance = new VariableInstance(__scopeInstanceId, var);
Node varNode = __runtimeContext.fetchVariableData(varInstance, null, false);
value = DOMUtils.domToString(varNode);
} catch (Throwable e) {
// Don't throw any exception back to the caller. Just return null as value.
}
return value;
}
/**
* Evaluate expression and return opaque type
*
* @param cexp cexp
* @param ctx ctx
* @param type type
* @return type
* @throws FaultException FaultException
* @throws EvaluationException EvaluationException
*/
private Object evaluate(OExpression cexp, EvaluationContext ctx, QName type)
throws FaultException, EvaluationException {
try {
OXQuery10ExpressionBPEL20 oxquery10 = ((OXQuery10ExpressionBPEL20) cexp);
XQDataSource xqds = new SaxonXQDataSource();
XQConnection xqconn = xqds.getConnection();
Configuration configuration = ((SaxonXQConnection) xqconn).getConfiguration();
configuration.setAllNodesUntyped(true);
configuration.setHostLanguage(Configuration.XQUERY);
XQStaticContext staticEnv = xqconn.getStaticContext();
NSContext nsContext = oxquery10.getNamespaceCtx();
Set<String> prefixes = nsContext.getPrefixes();
for (String prefix : prefixes) {
String uri = nsContext.getNamespaceURI(prefix);
staticEnv.declareNamespace(prefix, uri);
}
configuration.setSchemaValidationMode(Validation.SKIP);
xqconn.setStaticContext(staticEnv);
// Prepare expression, for starters
String xquery =
oxquery10
.getXquery()
.replaceFirst(
Constants.XQUERY_FUNCTION_HANDLER_COMPILER,
Constants.XQUERY_FUNCTION_HANDLER_RUNTIME);
XQPreparedExpression exp = xqconn.prepareExpression(xquery);
JaxpFunctionResolver funcResolver = new JaxpFunctionResolver(ctx, oxquery10);
JaxpVariableResolver variableResolver =
new JaxpVariableResolver(ctx, oxquery10, configuration);
// Bind external variables to runtime values
for (QName variable : exp.getAllUnboundExternalVariables()) {
// Evaluate referenced variable
Object value = variableResolver.resolveVariable(variable);
if (value instanceof Value) {
SaxonXQConnection saxonConn = (SaxonXQConnection) xqconn;
try {
Item item = ((Value) value).asItem();
if (item == null) {
exp.bindSequence(variable, xqconn.createSequence(Collections.EMPTY_LIST.iterator()));
} else {
XQItem item2 = new SaxonXQItem(item, saxonConn);
exp.bindItem(variable, item2);
}
} catch (XPathException e) {
__log.warn("", e);
}
} else {
if (value instanceof Date) {
Date d = (Date) value;
value = org.apache.ode.utils.ISO8601DateParser.format(d);
}
// Figure out type of variable
XQSequenceType xqType = getItemType(xqconn, value);
// Saxon doesn't like binding sequences to variables
if (value instanceof Node) {
// a node is a node-list, but the inverse isn't true.
// so, if the value is truly a node, leave it alone.
} else if (value instanceof NodeList) {
// So extract the first item from the node list
NodeList nodeList = (NodeList) value;
ArrayList nodeArray = new ArrayList();
for (int i = 0; i < nodeList.getLength(); i++) {
nodeArray.add(nodeList.item(i));
}
value = xqconn.createSequence(nodeArray.iterator());
}
// Bind value with external variable
if (value != null && xqType != null) {
if (value instanceof XQSequence) {
exp.bindSequence(variable, (XQSequence) value);
} else {
if (xqType instanceof XQItemType) {
exp.bindObject(variable, value, (XQItemType) xqType);
}
}
}
}
}
// Set context node
Node contextNode = (ctx.getRootNode() == null) ? DOMUtils.newDocument() : ctx.getRootNode();
contextNode.setUserData(
XQuery10BpelFunctions.USER_DATA_KEY_FUNCTION_RESOLVER, funcResolver, null);
exp.bindItem(
XQConstants.CONTEXT_ITEM,
xqconn.createItemFromNode(contextNode, xqconn.createNodeType()));
// Execute query
XQResultSequence result = exp.executeQuery();
// Cast Saxon result to Java result
Object evalResult = getResultValue(type, result);
if ((evalResult != null) && __log.isDebugEnabled()) {
__log.debug(
"Expression "
+ cexp.toString()
+ " generated result "
+ evalResult
+ " - type="
+ evalResult.getClass().getName());
if (ctx.getRootNode() != null) {
__log.debug("Was using context node " + DOMUtils.domToString(ctx.getRootNode()));
}
}
return evalResult;
} catch (XQException xqe) {
// Extracting the real cause from all this wrapping isn't a simple task
Throwable cause = (xqe.getCause() != null) ? xqe.getCause() : xqe;
if (cause instanceof DynamicError) {
Throwable th = ((DynamicError) cause).getException();
if (th != null) {
cause = th;
if (cause.getCause() != null) {
cause = cause.getCause();
}
}
}
throw new EvaluationException(
"Error while executing an XQuery expression: " + cause.toString(), cause);
} catch (WrappedResolverException wre) {
__log.debug("Could not evaluate expression because of ", wre);
throw (FaultException) wre.getCause();
}
}
