gov.nih.nci.security.upt.util.ClassPathLoader.java Source code

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Here is the source code for gov.nih.nci.security.upt.util.ClassPathLoader.java

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/*L
 *  Copyright Ekagra Software Technologies Ltd.
 *  Copyright SAIC, SAIC-Frederick
 *
 *  Distributed under the OSI-approved BSD 3-Clause License.
 *  See http://ncip.github.com/common-security-module/LICENSE.txt for details.
 */

package gov.nih.nci.security.upt.util;

import gov.nih.nci.security.upt.constants.DisplayConstants;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Vector;

import javax.servlet.http.HttpSession;

import org.hibernate.SessionFactory;

public class ClassPathLoader {

    private static final Class[] parameters = new Class[] { URL.class };

    public static void addFile(String s) throws IOException {
        File f = new File(s);
        addFile(f);
    }// end method

    public static void addFile(File f) throws IOException {
        addURL(f.toURL());
    }// end method

    public static void addURL(URL u) throws IOException {

        URLClassLoader sysloader = (URLClassLoader) Thread.currentThread().getContextClassLoader();
        Class sysclass = URLClassLoader.class;

        try {
            Method method = sysclass.getDeclaredMethod("addURL", parameters);
            method.setAccessible(true);
            method.invoke(sysloader, new Object[] { u });
        } catch (Throwable t) {
            throw new IOException("Error, could not add URL to system classloader");
        }

    }

    public static void releaseJarsFromClassPath(HttpSession session) {

        SessionFactory sf = (SessionFactory) session.getAttribute(DisplayConstants.HIBERNATE_SESSIONFACTORY);
        if (sf != null) {
            sf.close();
            sf = null;
        }

        Vector<String> v = new Vector<String>();
        URLClassLoader sysloader = (URLClassLoader) Thread.currentThread().getContextClassLoader();
        ClassLoaderUtil.releaseLoader(sysloader, v);

        File fileArray[] = (File[]) session.getAttribute(DisplayConstants.HIBERNATE_CONFIG_FILE_JAR);
        if (fileArray != null) {

            for (int i = 0; i < fileArray.length; i++) {

                if (fileArray[i] != null && fileArray[i].exists()) {
                    fileArray[i].delete();
                    fileArray[i] = null;
                }

            }
        }

    }

}