private static Optional<StepFunction> mvel(String source) {
try {
final Serializable mvel = MVEL.compileExpression(source);
MVEL.executeExpression(mvel, ImmutableMap.of("c", 1));
StepFunction step =
new StepFunction() {
public int step(int from) {
return (Integer) MVEL.executeExpression(mvel, ImmutableMap.of("c", from));
}
};
return Optional.of(step);
} catch (Exception e) {
return Optional.absent();
}
}
public Map insertFilter(Source source) {
JavaResult result = new JavaResult();
// preserve the previous classloader, While we make Smooks aware of the Drools classloader
ClassLoader previousClassLoader = Thread.currentThread().getContextClassLoader();
Thread.currentThread()
.setContextClassLoader(
((InternalRuleBase) this.session.getRuleBase()).getRootClassLoader());
ExecutionContext executionContext = this.smooks.createExecutionContext();
// Filter the input message to extract, using the execution context...
smooks.filter(source, result, executionContext);
Thread.currentThread().setContextClassLoader(previousClassLoader);
Map handles = new HashMap<FactHandle, Object>();
Object object = result.getBean(this.configuration.getRoodId());
if (object == null) {
return handles;
}
if (this.getterExpr != null) {
Iterable it = (Iterable) MVEL.executeExpression(this.getterExpr, object);
if (it != null) {
for (Object item : it) {
FactHandle handle = this.session.insert(item);
handles.put(handle, object);
}
}
} else {
FactHandle handle = this.session.insert(object);
handles.put(handle, object);
}
return handles;
}