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https://issues.apache.org/jira/browse/SLING-4926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14659956#comment-14659956
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David Herges commented on SLING-4926:
-------------------------------------
Maybe this could be an addition to {{ChildResourceInjector}} ?
> Sling Models: inject a map of adaptable child resources
> -------------------------------------------------------
>
> Key: SLING-4926
> URL: https://issues.apache.org/jira/browse/SLING-4926
> Project: Sling
> Issue Type: Improvement
> Affects Versions: Sling Models API 1.1.0
> Reporter: David Herges
> Labels: injection, model, models
>
> Iterates over child resources and injects a map with entries
> <childResourceName, childResource.adaptTo(Target.class)>
> Usage:
> {code}
> @Model(adptable=Resource.class)
> public class MyModel {
> @Inject @Source("adaptable-child-resources-map")
> protected Map<String, MyAdaptable> childResources;
> }
> {code}
> Quick write up:
> {code}
> /**
> * AdaptableChildResourcesMapInjector ... injects child resources into a
> map.put(resource.name(), resource.adaptTo(type))
> *
> * <h2>Usage</h2>
> * <code>protected Map<String, MyAdaptable> injectableMemberField;</code>
> */
> @Component
> @Service
> @Property(name = Constants.SERVICE_RANKING, intValue = 9999)
> public class AdaptableChildResourcesMapInjector implements Injector{
> @Override
> public String getName() {
> return "adaptable-child-resources-map";
> }
> @Override
> public Object getValue(Object adaptable, String name, Type declaredType,
> AnnotatedElement annotatedElement,
> DisposalCallbackRegistry disposalCallbackRegistry) {
> Resource res = resourceFromAdaptable(adaptable);
> Class<?> targetType = declaredMapWithValueType(declaredType);
> if ((res != null) && (targetType != null)) {
> Map<String, Object> result = new HashMap<String, Object>();
> Iterator<Resource> iter = res.listChildren();
> while ((iter != null) && iter.hasNext()) {
> Resource next = iter.next();
> result.put(next.getName(), next.adaptTo(targetType));
> }
> return result;
> }
> return null;
> }
> private Resource resourceFromAdaptable(Object adaptable) {
> if (adaptable instanceof Resource) {
> return (Resource) adaptable;
> } else if (adaptable instanceof Adaptable) {
> return ((Adaptable) adaptable).adaptTo(Resource.class);
> }
> return null;
> }
> // Checks if <code>declaredType</code> is a Map<String, {declaredType}>
> ... returns {declaredType} or 'null'
> protected Class<?> declaredMapWithValueType(Type declaredType) {
> if (declaredType instanceof ParameterizedType) {
> ParameterizedType type = (ParameterizedType) declaredType;
> Class<?> rawType = (Class<?>) type.getRawType();
> Type[] typeArguments = type.getActualTypeArguments();
> if (rawType.equals(Map.class) && (typeArguments.length == 2)
> && typeArguments[0].equals(String.class)) {
> // returns the V from Map<K, V>
> return (Class<?>) typeArguments[1];
> }
> }
> return null;
> }
> }
> {code}
> wdyt?
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