private <T> QName determineRerturnType(
Class<T> type,
ScriptExpressionEvaluatorType expressionType,
ItemDefinition outputDefinition,
ScriptExpressionReturnTypeType suggestedReturnType)
throws ExpressionEvaluationException {
if (expressionType.getReturnType() == ScriptExpressionReturnTypeType.LIST
|| suggestedReturnType == ScriptExpressionReturnTypeType.LIST) {
return XPathConstants.NODESET;
}
if (expressionType.getReturnType() == ScriptExpressionReturnTypeType.SCALAR) {
return toXPathReturnType(outputDefinition.getTypeName());
}
if (suggestedReturnType == ScriptExpressionReturnTypeType.LIST) {
return XPathConstants.NODESET;
}
if (suggestedReturnType == ScriptExpressionReturnTypeType.SCALAR) {
return toXPathReturnType(outputDefinition.getTypeName());
}
if (outputDefinition.isMultiValue()) {
return XPathConstants.NODESET;
} else {
return toXPathReturnType(outputDefinition.getTypeName());
}
}
public <IV extends PrismValue, ID extends ItemDefinition> XNode serializeItem(
Item<IV, ID> item, SerializationContext ctx) throws SchemaException {
ListXNode xlist = new ListXNode();
List<IV> values = item.getValues();
ItemDefinition definition = item.getDefinition();
for (IV val : values) {
XNode xsubnode = serializeItemValue(val, definition, ctx);
xlist.add(xsubnode);
}
boolean asList;
if (definition != null) {
asList = definition.isMultiValue();
} else {
asList = values.size() > 1;
}
if (asList) {
return xlist;
} else {
if (xlist.isEmpty()) {
return null;
} else {
return xlist.iterator().next();
}
}
}
@Override
public <T, V extends PrismValue> List<V> evaluate(
ScriptExpressionEvaluatorType expressionType,
ExpressionVariables variables,
ItemDefinition outputDefinition,
ScriptExpressionReturnTypeType suggestedReturnType,
ObjectResolver objectResolver,
Collection<FunctionLibrary> functions,
String contextDescription,
Task task,
OperationResult result)
throws ExpressionEvaluationException, ObjectNotFoundException, ExpressionSyntaxException {
String codeString = expressionType.getCode();
if (codeString == null) {
throw new ExpressionEvaluationException("No script code in " + contextDescription);
}
Class<T> type = null;
if (outputDefinition != null) {
QName xsdReturnType = outputDefinition.getTypeName();
type = XsdTypeMapper.toJavaType(xsdReturnType); // may return null if unknown
}
if (type == null) {
type =
(Class<T>)
Element
.class; // actually, if outputDefinition is null, the return value is of no
// interest for us
}
QName returnType =
determineRerturnType(type, expressionType, outputDefinition, suggestedReturnType);
Object evaluatedExpression =
evaluate(
returnType,
codeString,
variables,
objectResolver,
functions,
contextDescription,
result);
List<V> propertyValues;
boolean scalar = !outputDefinition.isMultiValue();
if (expressionType.getReturnType() != null) {
scalar = isScalar(expressionType.getReturnType());
} else if (suggestedReturnType != null) {
scalar = isScalar(suggestedReturnType);
}
if (scalar) {
if (evaluatedExpression instanceof NodeList) {
NodeList evaluatedExpressionNodeList = (NodeList) evaluatedExpression;
if (evaluatedExpressionNodeList.getLength() > 1) {
throw new ExpressionEvaluationException(
"Expected scalar expression result but got a list result with "
+ evaluatedExpressionNodeList.getLength()
+ " elements in "
+ contextDescription);
}
if (evaluatedExpressionNodeList.getLength() == 0) {
evaluatedExpression = null;
} else {
evaluatedExpression = evaluatedExpressionNodeList.item(0);
}
}
propertyValues = new ArrayList<V>(1);
V pval = convertScalar(type, returnType, evaluatedExpression, contextDescription);
if (pval instanceof PrismPropertyValue
&& !isNothing(((PrismPropertyValue<T>) pval).getValue())) {
propertyValues.add(pval);
}
} else {
if (!(evaluatedExpression instanceof NodeList)) {
throw new IllegalStateException(
"The expression "
+ contextDescription
+ " resulted in "
+ evaluatedExpression.getClass().getName()
+ " while exprecting NodeList in "
+ contextDescription);
}
propertyValues = convertList(type, (NodeList) evaluatedExpression, contextDescription);
}
return (List<V>) PrismValue.cloneCollection(propertyValues);
}