global.namespace.neuron.di.internal.RealIncubator Maven / Gradle / Ivy
/*
* Copyright © 2016 Schlichtherle IT Services
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package global.namespace.neuron.di.internal;
import global.namespace.neuron.di.java.BreedingException;
import java.lang.reflect.InvocationTargetException;
import java.util.Collections;
import java.util.Map;
import java.util.WeakHashMap;
public final class RealIncubator {
private static final Map, ProxyFactory> factories = Collections.synchronizedMap(new WeakHashMap<>());
private RealIncubator() {
}
public static C breed(Class clazz, MethodBinding binding) {
return new Visitor() {
C instance;
{
ClassElement.of(clazz).accept(this);
}
@SuppressWarnings("unchecked")
@Override
public void visitNeuron(NeuronElement element) {
assert clazz == element.clazz();
final ProxyFactory factory = (ProxyFactory) factories
.computeIfAbsent(clazz, key -> new ProxyContext<>(element).factory());
instance = factory.apply(binding);
}
@Override
public void visitClass(final ClassElement element) {
assert clazz == element.clazz();
try {
instance = clazz.getDeclaredConstructor().newInstance();
} catch (NoSuchMethodException e) {
throw new BreedingException("Class must have a non-private constructor without parameters.", e);
} catch (InstantiationException e) {
throw new AssertionError(e);
} catch (IllegalAccessException | InvocationTargetException e) {
throw new BreedingException(e);
}
}
}.instance;
}
}