use of org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessor in project sling by apache.
the class ModelAdapterFactory method injectElement.
@CheckForNull
private RuntimeException injectElement(final InjectableElement element, final Object adaptable, @Nonnull final DisposalCallbackRegistry registry, final InjectCallback callback, @Nonnull final Map<ValuePreparer, Object> preparedValues) {
InjectAnnotationProcessor annotationProcessor = null;
String source = element.getSource();
boolean wasInjectionSuccessful = false;
// find an appropriate annotation processor
for (InjectAnnotationProcessorFactory2 factory : injectAnnotationProcessorFactories2) {
annotationProcessor = factory.createAnnotationProcessor(adaptable, element.getAnnotatedElement());
if (annotationProcessor != null) {
break;
}
}
if (annotationProcessor == null) {
for (InjectAnnotationProcessorFactory factory : injectAnnotationProcessorFactories) {
annotationProcessor = factory.createAnnotationProcessor(adaptable, element.getAnnotatedElement());
if (annotationProcessor != null) {
break;
}
}
}
String name = getName(element, annotationProcessor);
final Object injectionAdaptable = getAdaptable(adaptable, element, annotationProcessor);
RuntimeException lastInjectionException = null;
if (injectionAdaptable != null) {
// prepare the set of injectors to process. if a source is given only use injectors with this name.
final RankedServices<Injector> injectorsToProcess;
if (StringUtils.isEmpty(source)) {
injectorsToProcess = sortedInjectors;
} else {
injectorsToProcess = injectors.get(source);
if (injectorsToProcess == null) {
throw new IllegalArgumentException("No Sling Models Injector registered for source '" + source + "'.");
}
}
// find the right injector
for (Injector injector : injectorsToProcess) {
if (name != null || injector instanceof AcceptsNullName) {
Object preparedValue = injectionAdaptable;
// only do the ValuePreparer optimization for the original adaptable
if (injector instanceof ValuePreparer && adaptable == injectionAdaptable) {
final ValuePreparer preparer = (ValuePreparer) injector;
Object fromMap = preparedValues.get(preparer);
if (fromMap != null) {
preparedValue = fromMap;
} else {
preparedValue = preparer.prepareValue(injectionAdaptable);
preparedValues.put(preparer, preparedValue);
}
}
Object value = injector.getValue(preparedValue, name, element.getType(), element.getAnnotatedElement(), registry);
if (value != null) {
lastInjectionException = callback.inject(element, value);
if (lastInjectionException == null) {
wasInjectionSuccessful = true;
break;
}
}
}
}
}
// if injection failed, use default
if (!wasInjectionSuccessful) {
Result<Boolean> defaultInjectionResult = injectDefaultValue(element, annotationProcessor, callback);
if (defaultInjectionResult.wasSuccessful()) {
wasInjectionSuccessful = defaultInjectionResult.getValue();
// log previous injection error, if there was any
if (lastInjectionException != null && wasInjectionSuccessful) {
log.debug("Although falling back to default value worked, injection into {} failed because of: " + lastInjectionException.getMessage(), element.getAnnotatedElement(), lastInjectionException);
}
} else {
return defaultInjectionResult.getThrowable();
}
}
// if default is not set, check if mandatory
if (!wasInjectionSuccessful) {
if (element.isOptional(annotationProcessor)) {
// log previous injection error, if there was any
if (lastInjectionException != null) {
log.debug("Injection into optional element {} failed because of: " + lastInjectionException.getMessage(), element.getAnnotatedElement(), lastInjectionException);
}
if (element.isPrimitive()) {
RuntimeException throwable = injectPrimitiveInitialValue(element, callback);
if (throwable != null) {
return throwable;
}
}
} else {
if (lastInjectionException != null) {
return lastInjectionException;
} else {
return new ModelClassException("No injector returned a non-null value!");
}
}
}
return null;
}
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