public Object generate() {
if (target.isNamespaceRef()) {
// e.g: #set ($x = $y)
throw new InterpretationException(
source,
indexInSource,
"Not possible to set namespace variable $" + target.getNamespaceName());
}
if (target.isMethodRef()) {
// e.g: #set (a() = 123)
throw new InterpretationException(
source, indexInSource, "Not possible to set a method, function or macro");
}
if (!target.hasAttributes()) {
// e.g: #set (x = "1") or #set ($n.x = "1")
data.setAttribute(target.getVariableName(), target.getSpecifiedContext(context));
} else {
// e.g: #set (x.a = "1") or #set ($n.x.a = "1") or #set (a.b.c.d = 1)
AttributeRefs targetAttributeRefs = target.getAttributesRefs();
AttributeRef targetAttributeRef = targetAttributeRefs.getLastAttribute();
String targetAttributeName = targetAttributeRef.getName();
Object targetObject = target.getContext().evaluate(target.getAttributeRef());
if (targetObject == null) {
throw new InterpretationException(
source,
indexInSource,
"Can not set value, the target was null '" + target.getAttributeRef().getName() + "'");
}
targetAttributeRefs = targetAttributeRefs.createAttributesSkipLast();
if (targetAttributeRefs.hasAttributes()) {
targetObject =
targetAttributeRefs.evaluateNextAttributes(target.getContext(), targetObject);
}
Context targetContext = contextFactory.createContext(targetObject, targetAttributeRef);
data.setAttribute(targetAttributeName, targetContext);
}
return null;
}
private void setContextToMacroLocalContextIfVariableExistsInParamaterList() {
AttributeRef attributeRef = target.getAttributeRef();
if (attributeRef != null) {
String variableToSet = attributeRef.getVariableName();
if (macro != null && macro.getParameters().contains(variableToSet)) {
context = macro.getLocalContext();
} else if (target.isNamespaceRef()) {
throw new RuntimeException("Setting namespaces not implemented.");
}
}
}