/***
* Copyright (c) 2009 Caelum - www.caelum.com.br/opensource All rights reserved.
*
* 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
*
* http://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 br.com.caelum.vraptor.interceptor;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.lang.reflect.WildcardType;
import java.util.Collection;
import javax.enterprise.context.ApplicationScoped;
import br.com.caelum.vraptor.util.StringUtils;
/**
* Default implementation for {@link TypeNameExtractor}.
* It decapitalizes the name of the type, or if the type is a generic collection,
* uses the decapitalized name of generic type plus 'List'.
*
* @author Lucas Cavalcanti
* @since 3.0.2
*/
@ApplicationScoped
public class DefaultTypeNameExtractor implements TypeNameExtractor {
@Override
public String nameFor(Type generic) {
if (generic instanceof ParameterizedType) {
return nameFor((ParameterizedType) generic);
}
if (generic instanceof WildcardType) {
return nameFor((WildcardType) generic);
}
if (generic instanceof TypeVariable<?>) {
return nameFor((TypeVariable<?>) generic);
}
return nameFor((Class<?>) generic);
}
private String nameFor(Class<?> raw) {
if (raw.isArray()) {
return nameFor(raw.getComponentType()) + "List";
}
String name = raw.getSimpleName();
return StringUtils.lowercaseFirst(name);
}
private String nameFor(TypeVariable<?> variable) {
return StringUtils.lowercaseFirst(variable.getName());
}
private String nameFor(WildcardType wild) {
if (wild.getLowerBounds().length != 0) {
return nameFor(wild.getLowerBounds()[0]);
} else {
return nameFor(wild.getUpperBounds()[0]);
}
}
private String nameFor(ParameterizedType type) {
Class<?> raw = (Class<?>) type.getRawType();
if (Collection.class.isAssignableFrom(raw)) {
return nameFor(type.getActualTypeArguments()[0]) + "List";
}
return nameFor(raw);
}
}