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Commit db2d2cbb755ff2928b98bb777d4a9cf492606605

Authored by Wilson Guimarães
1 parent 79df3bfb
Exists in master

Criação da abstração para bootstraps de seleção de estratégias.

Showing 1 changed file with 118 additions and 0 deletions   Show diff stats
impl/core/src/main/java/br/gov/frameworkdemoiselle/internal/bootstrap/AbstractStrategyBootstrap.java 0 → 100644
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  1 +/*
  2 + * Demoiselle Framework
  3 + * Copyright (C) 2010 SERPRO
  4 + * ----------------------------------------------------------------------------
  5 + * This file is part of Demoiselle Framework.
  6 + *
  7 + * Demoiselle Framework is free software; you can redistribute it and/or
  8 + * modify it under the terms of the GNU Lesser General Public License version 3
  9 + * as published by the Free Software Foundation.
  10 + *
  11 + * This program is distributed in the hope that it will be useful,
  12 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 + * GNU General Public License for more details.
  15 + *
  16 + * You should have received a copy of the GNU Lesser General Public License version 3
  17 + * along with this program; if not, see <http://www.gnu.org/licenses/>
  18 + * or write to the Free Software Foundation, Inc., 51 Franklin Street,
  19 + * Fifth Floor, Boston, MA 02110-1301, USA.
  20 + * ----------------------------------------------------------------------------
  21 + * Este arquivo é parte do Framework Demoiselle.
  22 + *
  23 + * O Framework Demoiselle é um software livre; você pode redistribuí-lo e/ou
  24 + * modificá-lo dentro dos termos da GNU LGPL versão 3 como publicada pela Fundação
  25 + * do Software Livre (FSF).
  26 + *
  27 + * Este programa é distribuído na esperança que possa ser útil, mas SEM NENHUMA
  28 + * GARANTIA; sem uma garantia implícita de ADEQUAÇÃO a qualquer MERCADO ou
  29 + * APLICAÇÃO EM PARTICULAR. Veja a Licença Pública Geral GNU/LGPL em português
  30 + * para maiores detalhes.
  31 + *
  32 + * Você deve ter recebido uma cópia da GNU LGPL versão 3, sob o título
  33 + * "LICENCA.txt", junto com esse programa. Se não, acesse <http://www.gnu.org/licenses/>
  34 + * ou escreva para a Fundação do Software Livre (FSF) Inc.,
  35 + * 51 Franklin St, Fifth Floor, Boston, MA 02111-1301, USA.
  36 + */
  37 +package br.gov.frameworkdemoiselle.internal.bootstrap;
  38 +
  39 +import javax.enterprise.event.Observes;
  40 +import javax.enterprise.inject.spi.BeforeBeanDiscovery;
  41 +import javax.enterprise.inject.spi.ProcessAnnotatedType;
  42 +
  43 +import org.apache.commons.configuration.Configuration;
  44 +import org.apache.commons.configuration.PropertiesConfiguration;
  45 +
  46 +import br.gov.frameworkdemoiselle.configuration.ConfigurationException;
  47 +import br.gov.frameworkdemoiselle.util.Reflections;
  48 +import br.gov.frameworkdemoiselle.util.Strings;
  49 +
  50 +public abstract class AbstractStrategyBootstrap<T, D extends T> extends AbstractBootstrap {
  51 +
  52 + private Class<T> type;
  53 +
  54 + private Class<D> defaultClass;
  55 +
  56 + private Class<? extends T> selected;
  57 +
  58 + private Class<T> getType() {
  59 + if (this.type == null) {
  60 + this.type = Reflections.getGenericTypeArgument(this.getClass(), 0);
  61 + }
  62 +
  63 + return this.type;
  64 + }
  65 +
  66 + private Class<D> getDefaultClass() {
  67 + if (this.defaultClass == null) {
  68 + this.defaultClass = Reflections.getGenericTypeArgument(this.getClass(), 1);
  69 + }
  70 +
  71 + return this.defaultClass;
  72 + }
  73 +
  74 + public void beforeBeanDiscovery(@Observes final BeforeBeanDiscovery event) {
  75 + selected = loadSelected();
  76 + }
  77 +
  78 + public <A> void processAnnotatedType(@Observes final ProcessAnnotatedType<A> event) {
  79 + Class<A> annotated = event.getAnnotatedType().getJavaClass();
  80 +
  81 + if (Reflections.isOfType(annotated, getType()) && annotated != selected) {
  82 + event.veto();
  83 + }
  84 + }
  85 +
  86 + @SuppressWarnings("unchecked")
  87 + private Class<T> loadSelected() {
  88 + Class<T> result = null;
  89 + String canonicalName = null;
  90 + String typeName = getType().getSimpleName().toLowerCase();
  91 + String key = null;
  92 +
  93 + try {
  94 + Configuration config = new PropertiesConfiguration("demoiselle.properties");
  95 + canonicalName = config.getString(getConfigurationKey(), getDefaultClass().getCanonicalName());
  96 +
  97 + ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
  98 + result = (Class<T>) Class.forName(canonicalName, false, classLoader);
  99 + result.asSubclass(getType());
  100 +
  101 + } catch (org.apache.commons.configuration.ConfigurationException cause) {
  102 + throw new ConfigurationException(getBundle().getString("file-not-found", "demoiselle.properties"));
  103 +
  104 + } catch (ClassNotFoundException cause) {
  105 + key = Strings.getString("{0}-class-not-found", typeName);
  106 + throw new ConfigurationException(getBundle().getString(key, canonicalName));
  107 +
  108 + } catch (ClassCastException cause) {
  109 + key = Strings.getString("{0}-class-must-be-of-type", typeName);
  110 + throw new ConfigurationException(getBundle().getString(key, canonicalName, getType()));
  111 + }
  112 +
  113 + return result;
  114 + }
  115 +
  116 + public abstract String getConfigurationKey();
  117 +
  118 +}
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