br.com.objectos.comuns.base.Anotacoes Maven / Gradle / Ivy
/*
* Copyright 2011 Objectos, Fábrica de Software LTDA.
*
* 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.objectos.comuns.base;
import java.lang.annotation.Annotation;
/**
* @author [email protected] (Marcio Endo)
*/
public class Anotacoes {
private Anotacoes() {
}
public static A obterAnotacaoDeInstancia(
Class classeDaAnotacao, Object objeto) {
Class classe = objeto.getClass();
return obterAnotacaoDeClasse(classeDaAnotacao, classe);
}
public static A obterAnotacaoDeClasse(
Class classeDaAnotacao, Class classe) {
A anotacao = null;
anotacao = classe.getAnnotation(classeDaAnotacao);
if (!classe.isInterface()) {
anotacao = anotacao == null ? obterAnotacaoDoArray(classeDaAnotacao,
classe.getInterfaces()) : anotacao;
}
if (anotacao != null) {
return anotacao;
}
throw new IllegalArgumentException("Classe " + classe.getName()
+ " não possui anotação @" + classeDaAnotacao.getSimpleName());
}
private static A obterAnotacaoDoArray(
Class classeDaAnotacao, Class[] classes) {
A anotacao = null;
for (Class candidata : classes) {
if (candidata.isAnnotationPresent(classeDaAnotacao)) {
anotacao = candidata.getAnnotation(classeDaAnotacao);
break;
}
}
return anotacao;
}
}