package org.jdbi.v3.core.collector;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collection;
import java.util.IdentityHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.stream.Collector;
import static java.util.stream.Collectors.toCollection;
import static java.util.stream.Collectors.toList;
import static org.jdbi.v3.core.generic.GenericTypes.findGenericParameter;
import static org.jdbi.v3.core.generic.GenericTypes.getErasedType;
class ListCollectorFactory implements CollectorFactory {
private final Map<Class<?>, Collector<?, ?, ?>> collectors = new IdentityHashMap<>();
ListCollectorFactory() {
collectors.put(Collection.class, toCollection(ArrayList::new));
collectors.put(List.class, toList());
collectors.put(ArrayList.class, toCollection(ArrayList::new));
collectors.put(LinkedList.class, toCollection(LinkedList::new));
collectors.put(CopyOnWriteArrayList.class, toCollection(CopyOnWriteArrayList::new));
}
@Override
public boolean accepts(Type containerType) {
return containerType instanceof ParameterizedType && collectors.containsKey(getErasedType(containerType));
}
@Override
public Optional<Type> elementType(Type containerType) {
Class<?> erasedType = getErasedType(containerType);
return findGenericParameter(containerType, erasedType);
}
@Override
public Collector<?, ?, ?> build(Type containerType) {
Class<?> erasedType = getErasedType(containerType);
return collectors.get(erasedType);
}
}