/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2017, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This 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; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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 this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.wildfly.extension.undertow.deployment;

import java.lang.reflect.InvocationTargetException;

import javax.naming.NamingException;

import org.apache.jasper.runtime.HttpJspBase;
import org.apache.tomcat.InstanceManager;
import org.jboss.as.web.common.WebInjectionContainer;

/**
 *
 * InstanceManager is evil and needs to go away
 *
 *
 * We don't use web injection container for instances of org.apache.jasper.runtime.HttpJspBase, as it causes problems
 * with JSP hot reload. Because a new JSP class has the same name the generated ID is exactly the same.
 *
 *
 * @author Stuart Douglas
 */
public class UndertowJSPInstanceManager implements InstanceManager {

    private final WebInjectionContainer webInjectionContainer;

    public UndertowJSPInstanceManager(final WebInjectionContainer webInjectionContainer) {
        this.webInjectionContainer = webInjectionContainer;
    }

    @Override
    public Object newInstance(final String className) throws IllegalAccessException, InvocationTargetException, NamingException, InstantiationException, ClassNotFoundException {
        return webInjectionContainer.newInstance(className);
    }

    @Override
    public Object newInstance(final String fqcn, final ClassLoader classLoader) throws IllegalAccessException, InvocationTargetException, NamingException, InstantiationException, ClassNotFoundException {
        return newInstance(classLoader.loadClass(fqcn));
    }

    @Override
    public Object newInstance(final Class<?> c) throws IllegalAccessException, InvocationTargetException, NamingException, InstantiationException {
        if(HttpJspBase.class.isAssignableFrom(c)) {
            return c.newInstance();
        }
        return webInjectionContainer.newInstance(c);
    }

    @Override
    public void newInstance(final Object o) throws IllegalAccessException, InvocationTargetException, NamingException {
        if(o instanceof HttpJspBase) {
            return;
        }
        webInjectionContainer.newInstance(o);
    }

    @Override
    public void destroyInstance(final Object o) throws IllegalAccessException, InvocationTargetException {
        if(o instanceof HttpJspBase) {
            return;
        }
        webInjectionContainer.destroyInstance(o);
    }
}