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ManagedClassProcessor.java
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ManagedClassProcessor.java
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/**
* Copyright (C) 2016 Czech Technical University in Prague
* <p>
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
* <p>
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jopa.model.metamodel;
import cz.cvut.kbss.jopa.exception.MetamodelInitializationException;
import cz.cvut.kbss.jopa.model.IRI;
import cz.cvut.kbss.jopa.model.annotations.MappedSuperclass;
import cz.cvut.kbss.jopa.model.annotations.Namespace;
import cz.cvut.kbss.jopa.model.annotations.Namespaces;
import cz.cvut.kbss.jopa.model.annotations.OWLClass;
import cz.cvut.kbss.jopa.utils.NamespaceResolver;
import java.lang.reflect.AnnotatedElement;
/**
* Utility methods for processing managed types for metamodel construction.
*/
class ManagedClassProcessor {
private static final EntityLifecycleCallbackResolver lifecycleCallbackResolver =
new EntityLifecycleCallbackResolver();
private ManagedClassProcessor() {
}
static <T> TypeBuilderContext<T> processManagedType(Class<T> cls) {
final NamespaceResolver resolver = detectNamespaces(cls);
final AbstractIdentifiableType<T> type;
if (isEntityType(cls)) {
type = processEntityType(cls, resolver);
} else if (isMappedSuperclassType(cls)) {
type = processMappedSuperclassType(cls);
} else {
throw new MetamodelInitializationException("Type " + cls + " is not a managed type.");
}
final EntityLifecycleListenerManager callbackManager = lifecycleCallbackResolver.resolve(type);
type.setLifecycleListenerManager(callbackManager);
return new TypeBuilderContext<>(type, resolver);
}
private static <T> NamespaceResolver detectNamespaces(Class<T> cls) {
final NamespaceResolver resolver = new NamespaceResolver();
if (cls.getPackage() != null) {
resolveNamespaces(cls.getPackage(), resolver);
}
resolveNamespaces(cls, resolver);
return resolver;
}
private static void resolveNamespaces(AnnotatedElement target, NamespaceResolver namespaceResolver) {
final Namespaces namespaces = target.getDeclaredAnnotation(Namespaces.class);
if (namespaces != null) {
for (Namespace ns : namespaces.value()) {
namespaceResolver.registerNamespace(ns.prefix(), ns.namespace());
}
}
final Namespace namespace = target.getDeclaredAnnotation(Namespace.class);
if (namespace != null) {
namespaceResolver.registerNamespace(namespace.prefix(), namespace.namespace());
}
}
private static <T> EntityTypeImpl<T> processEntityType(Class<T> cls, NamespaceResolver namespaceResolver) {
final OWLClass c = cls.getDeclaredAnnotation(OWLClass.class);
assert c != null;
checkForNoArgConstructor(cls);
return new EntityTypeImpl<>(cls.getSimpleName(), cls, IRI.create(namespaceResolver.resolveFullIri(c.iri())));
}
private static <T> void checkForNoArgConstructor(Class<T> cls) {
try {
cls.getDeclaredConstructor();
} catch (NoSuchMethodException e) {
throw new MetamodelInitializationException("Class " + cls + " is missing required no-arg constructor.");
}
}
private static <T> MappedSuperclassTypeImpl<T> processMappedSuperclassType(Class<T> cls) {
assert cls.getDeclaredAnnotation(MappedSuperclass.class) != null;
return new MappedSuperclassTypeImpl<>(cls);
}
static <T> Class<? super T> getManagedSupertype(Class<T> cls) {
if (cls.getSuperclass() != null && isManagedType(cls.getSuperclass())) {
return cls.getSuperclass();
}
return null;
}
private static boolean isManagedType(Class<?> cls) {
return isEntityType(cls) || isMappedSuperclassType(cls);
}
private static boolean isEntityType(Class<?> cls) {
return cls.getDeclaredAnnotation(OWLClass.class) != null;
}
private static boolean isMappedSuperclassType(Class<?> cls) {
return cls.getDeclaredAnnotation(MappedSuperclass.class) != null;
}
}