private MethodInfo chooseMethodWithMatchingParameters(
Exchange exchange, String parameters, Collection<MethodInfo> operationList)
throws AmbiguousMethodCallException {
// we have hardcoded parameters so need to match that with the given operations
Iterator<?> it = ObjectHelper.createIterator(parameters);
int count = 0;
while (it.hasNext()) {
it.next();
count++;
}
List<MethodInfo> operations = new ArrayList<MethodInfo>();
for (MethodInfo info : operationList) {
if (info.getParameters().size() == count) {
operations.add(info);
}
}
if (operations.isEmpty()) {
return null;
} else if (operations.size() == 1) {
return operations.get(0);
}
// okay we still got multiple operations, so need to match the best one
List<MethodInfo> candidates = new ArrayList<MethodInfo>();
for (MethodInfo info : operations) {
it = ObjectHelper.createIterator(parameters);
int index = 0;
boolean matches = true;
while (it.hasNext()) {
String parameter = (String) it.next();
Class<?> parameterType = BeanHelper.getValidParameterType(parameter);
Class<?> expectedType = info.getParameters().get(index).getType();
if (parameterType != null && expectedType != null) {
if (!parameterType.isAssignableFrom(expectedType)) {
matches = false;
break;
}
}
index++;
}
if (matches) {
candidates.add(info);
}
}
if (candidates.size() > 1) {
MethodInfo answer = getSingleCovariantMethod(candidates);
if (answer == null) {
throw new AmbiguousMethodCallException(exchange, candidates);
}
return answer;
}
return candidates.size() == 1 ? candidates.get(0) : null;
}
private MethodInfo chooseMethodWithMatchingParameters(
Exchange exchange, String parameters, Collection<MethodInfo> operationList)
throws AmbiguousMethodCallException {
// we have hardcoded parameters so need to match that with the given operations
Iterator<?> it = ObjectHelper.createIterator(parameters);
int count = 0;
while (it.hasNext()) {
it.next();
count++;
}
List<MethodInfo> operations = new ArrayList<MethodInfo>();
for (MethodInfo info : operationList) {
if (info.getParameters().size() == count) {
operations.add(info);
}
}
if (operations.isEmpty()) {
return null;
} else if (operations.size() == 1) {
return operations.get(0);
}
// okay we still got multiple operations, so need to match the best one
List<MethodInfo> candidates = new ArrayList<MethodInfo>();
MethodInfo fallbackCandidate = null;
for (MethodInfo info : operations) {
it = ObjectHelper.createIterator(parameters, ",", false);
int index = 0;
boolean matches = true;
while (it.hasNext()) {
String parameter = (String) it.next();
if (parameter != null) {
// must trim
parameter = parameter.trim();
}
Class<?> parameterType = BeanHelper.getValidParameterType(parameter);
Class<?> expectedType = info.getParameters().get(index).getType();
if (parameterType != null && expectedType != null) {
// if its a simple language then we need to evaluate the expression
// so we have the result and can find out what type the parameter actually is
if (StringHelper.hasStartToken(parameter, "simple")) {
LOG.trace(
"Evaluating simple expression for parameter #{}: {} to determine the class type of the parameter",
index,
parameter);
Object out =
getCamelContext()
.resolveLanguage("simple")
.createExpression(parameter)
.evaluate(exchange, Object.class);
if (out != null) {
parameterType = out.getClass();
}
}
// skip java.lang.Object type, when we have multiple possible methods we want to avoid it
// if possible
if (Object.class.equals(expectedType)) {
fallbackCandidate = info;
matches = false;
break;
}
boolean matchingTypes = isParameterMatchingType(parameterType, expectedType);
if (!matchingTypes) {
matches = false;
break;
}
}
index++;
}
if (matches) {
candidates.add(info);
}
}
if (candidates.size() > 1) {
MethodInfo answer = getSingleCovariantMethod(candidates);
if (answer != null) {
return answer;
}
}
return candidates.size() == 1 ? candidates.get(0) : fallbackCandidate;
}