Need to access TransformQuery.transform(CDAEntry entry)

[jmfayard]

Bonjour,

In our codebase, we have some boring manual mapping functions like this one:

fun mapCDAEntryToEmployee(entry: CDAEntry): Employee {
    return Employee(
        id = entry.id(),
        firstName = entry.getField("firstName") ?: String.EMPTY,
        lastName = entry.getField("lastName") ?: String.EMPTY,
/// ...
    )
}

That's because we need to call that outside of a TransformQuery

And TransformQuery seems to be the only place where mapping from a CDAEntry to a POJO via annotations is available

contentful.java/src/main/java/com/contentful/java/cda/TransformQuery.java

Lines 349 to 465 in 05a3333

	private Object transform(CDAEntry entry) {
	final Object result;
	if (!customClassByContentTypeIdCache.containsKey(entry.contentType().id())) {
	return entry;
	}
	final Class<?> type = customClassByContentTypeIdCache.get(entry.contentType().id());
	if (instanceCache.containsKey(entry.id())) {
	result = instanceCache.get(entry.id());
	} else {
	try {
	result = type.newInstance();
	} catch (Exception e) {
	throw new IllegalStateException("Cannot transform entry " + entry + " to type "
	+ type.getCanonicalName(), e);
	}
	instanceCache.put(entry.id(), result);
	for (final Field field : type.getDeclaredFields()) {
	final ContentfulField annotation = field.getAnnotation(ContentfulField.class);
	if (annotation != null) {
	transformFieldAnnotation(entry, result, field, annotation);
	} else {
	final ContentfulSystemField systemField =
	field.getAnnotation(ContentfulSystemField.class);
	if (systemField != null) {
	transformSystemFieldAnnotation(entry, result, field, systemField);
	}
	}
	}
	}
	return result;
	}
	private void transformFieldAnnotation(
	CDAEntry entry,
	Object result,
	Field field,
	ContentfulField annotation) {
	final boolean wasAccessible = field.isAccessible();
	field.setAccessible(true);
	final String key;
	if (annotation.value().isEmpty()) {
	key = field.getName();
	} else {
	key = annotation.value();
	}
	final String locale;
	if (annotation.locale().isEmpty()) {
	locale = entry.defaultLocale;
	} else {
	locale = annotation.locale();
	}
	try {
	final Object value = entry.getField(locale, key);
	if (value instanceof CDAEntry) {
	final CDAEntry fieldEntry = (CDAEntry) value;
	if (!instanceCache.containsKey(fieldEntry.id())) {
	transform(fieldEntry);
	}
	field.set(result, instanceCache.get(fieldEntry.id()));
	} else if (value instanceof Collection) {
	@SuppressWarnings("unchecked") final Collection<Object> collection = (Collection) value;
	final ArrayList<Object> transformedList = new ArrayList<>(collection.size());
	for (final Object element : collection) {
	if (element instanceof CDAEntry) {
	final CDAEntry collectionEntry = (CDAEntry) element;
	if (customClassByContentTypeIdCache.containsKey(collectionEntry.contentType().id())) {
	transformedList.add(transform(collectionEntry));
	} else {
	transformedList.add(element);
	}
	} else {
	transformedList.add(element);
	}
	field.set(result, transformedList);
	}
	} else {
	field.set(result, value);
	}
	} catch (IllegalAccessException e) {
	throw new IllegalStateException("Cannot set custom field " + key + ".");
	} finally {
	field.setAccessible(wasAccessible);
	}
	}
	private void transformSystemFieldAnnotation(CDAEntry entry, Object result, Field field,
	ContentfulSystemField annotation) {
	if (!field.isAccessible()) {
	field.setAccessible(true);
	}
	final String key;
	if (annotation.value().isEmpty()) {
	key = field.getName();
	} else {
	key = annotation.value();
	}
	try {
	field.set(result, entry.getAttribute(key));
	} catch (IllegalAccessException e) {
	throw new IllegalStateException("Cannot set custom system field " + key + ".");
	}
	}
	}

Would it be possible to add a public API for that?

[rafalniski]

Hey @jmfayard ,
unfortunately, we don't have plans to make it a public API any time soon.