/**
* Tries to find a data binder reference for an injected {@link Model}.
*
* @param inst the injectable instance
* @return the data binder reference or null if not found.
*/
private static DataBinderRef lookupBinderForModel(final InjectableInstance<?> inst) {
Statement dataBinderRef;
MetaClass dataModelType;
InjectUtil.BeanMetric beanMetric =
InjectUtil.getFilteredBeanMetric(
inst.getInjectionContext(), inst.getInjector().getInjectedType(), Model.class);
if (!beanMetric.getAllInjectors().isEmpty()) {
final Collection<Object> allInjectors = beanMetric.getAllInjectors();
if (allInjectors.size() > 1) {
throw new GenerationException("Multiple @Models injected in " + inst.getEnclosingType());
} else if (allInjectors.size() == 1) {
final Object injectorElement = allInjectors.iterator().next();
if (injectorElement instanceof MetaConstructor || injectorElement instanceof MetaMethod) {
final MetaParameter mp = beanMetric.getConsolidatedMetaParameters().iterator().next();
dataModelType = mp.getType();
assertTypeIsBindable(dataModelType);
dataBinderRef = inst.getTransientValue(TRANSIENT_BINDER_VALUE, DataBinder.class);
inst.ensureMemberExposed();
} else {
final MetaField field = (MetaField) allInjectors.iterator().next();
dataModelType = field.getType();
assertTypeIsBindable(dataModelType);
dataBinderRef = inst.getTransientValue(TRANSIENT_BINDER_VALUE, DataBinder.class);
inst.getInjectionContext().addExposedField(field, PrivateAccessType.Both);
}
return new DataBinderRef(dataModelType, dataBinderRef);
}
} else {
List<MetaField> modelFields =
inst.getInjector().getInjectedType().getFieldsAnnotatedWith(Model.class);
if (!modelFields.isEmpty()) {
throw new GenerationException(
"Found one or more fields annotated with @Model but missing @Inject "
+ modelFields.toString());
}
List<MetaParameter> modelParameters =
inst.getInjector().getInjectedType().getParametersAnnotatedWith(Model.class);
if (!modelParameters.isEmpty()) {
throw new GenerationException(
"Found one or more constructor or method parameters annotated with @Model but missing @Inject "
+ modelParameters.toString());
}
}
return null;
}
