com.autentia.common.util.ejb.JBossUtils.java Source code

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Here is the source code for com.autentia.common.util.ejb.JBossUtils.java

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/**
 * Copyright 2008 Autentia Real Business Solutions S.L.
 * 
 * This file is part of autentia-util.
 * 
 * autentia-util is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, version 3 of the License.
 * 
 * autentia-util is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with autentia-util. If not, see <http://www.gnu.org/licenses/>.
 */

package com.autentia.common.util.ejb;

import java.io.File;
import java.net.URL;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public final class JBossUtils {

    private static Log log = LogFactory.getLog(JBossUtils.class);

    private JBossUtils() {
        // Para cumplir con el patrn sigleton
    }

    /**
     * Devuelve el nombre del ear en el que se encuentra la clase <code>clazz</code>. "" si no est en un ear.
     * <p>
     * Este mtodo esta probado para JBoss 4.2.2GA.
     * 
     * @param clazz clase que se est buscando.
     * @return el nombre del ear en el que se encuentra la clase <code>clazz</code>. "" si no est en un ear.
     */
    public static String getEarName(Class<?> clazz) {
        String cn = File.separator + clazz.getCanonicalName();
        cn = cn.replace('.', File.separatorChar);
        cn += ".class";
        final URL url = Thread.currentThread().getContextClassLoader().getResource(cn);
        final String path = url.getPath();
        if (log.isDebugEnabled()) {
            log.debug(clazz.getCanonicalName() + " is in path: " + path);
        }
        final int indexOfEar = path.indexOf(".ear");
        final int indexOfExclamationChar = path.indexOf("!");
        if (indexOfEar > -1 && indexOfExclamationChar > -1 && indexOfEar < indexOfExclamationChar) {
            // JBoss despliega los ear en un directorio temporal del estilo: .../tmp34545nombreDelEar.ear-contents/...
            int beginTempDir = path.lastIndexOf(File.separatorChar, indexOfEar);
            int i = beginTempDir;
            boolean reachedDigit = false;
            while (i < indexOfEar) {
                if (Character.isDigit(path.charAt(i))) {
                    reachedDigit = true;
                } else if (reachedDigit) {
                    break;
                }
                i++;
            }
            final String prefix = path.substring(i, indexOfEar) + File.separator;
            log.debug(clazz.getCanonicalName() + " is inside ear: " + prefix);
            return prefix;
        }

        log.debug(clazz.getCanonicalName() + " is not inside an ear.");
        return "";
    }
}