/**
* Returns {@code true} if the given key has already been registered. This is used to prevent
* reentrant metadata registration (and cycles).
*/
public boolean isRegistered(ElementKey<?, ?> key) {
RootKey rootKey = Schema.getRootKey(key);
ElementMetadataRegistryBuilder elementRegistry = elements.get(rootKey);
if (elementRegistry != null) {
return elementRegistry.isRegistered(null, key, null);
}
return false;
}
/**
* Returns the existing element registry for the given key, or creates it if it does not already
* exist.
*/
private synchronized AttributeMetadataRegistryBuilder getOrCreateAttribute(AttributeKey<?> key) {
RootKey rootKey = Schema.getRootKey(key);
AttributeMetadataRegistryBuilder attRegistry = attributes.get(rootKey);
if (attRegistry == null) {
attRegistry = new AttributeMetadataRegistryBuilder(this);
attributes.put(rootKey, attRegistry);
}
dirty();
return attRegistry;
}
/**
* Returns the existing element registry for the given key, or creates it if it does not already
* exist.
*/
private synchronized ElementMetadataRegistryBuilder getOrCreateElement(ElementKey<?, ?> key) {
RootKey rootKey = Schema.getRootKey(key);
ElementMetadataRegistryBuilder elementRegistry = elements.get(rootKey);
if (elementRegistry == null) {
elementRegistry = new ElementMetadataRegistryBuilder(this);
elements.put(rootKey, elementRegistry);
}
dirty();
return elementRegistry;
}
