// Copyright (C) 2001-2003 Jon A. Maxwell (JAM)
// 
// This library 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 library 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 library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.


package netx.jnlp.services;

import java.io.*;
import java.net.*;
import java.util.*;
import java.lang.ref.*;
import java.lang.reflect.*;
import java.security.*;
import javax.jnlp.*;
import netx.jnlp.*;

/**
 * Lookup table for services.
 *
 * @author <a href="mailto:jmaxwell@users.sourceforge.net">Jon A. Maxwell (JAM)</a> - initial author
 * @version $Revision: 1.6 $ 
 */
public class XServiceManagerStub implements ServiceManagerStub {

    // todo: only include ExtensionInstallerService if an installer
    // is getting the service, otherwise return null.

    // todo: fix services to do their own privileged actions that
    // run less code in the secure environment (or avoid privileged
    // actions by giving permission to the code source).

    private static String serviceNames[] = {
        "javax.jnlp.BasicService", // required
        "javax.jnlp.DownloadService", // required
        "javax.jnlp.ExtensionInstallerService", // required
        "javax.jnlp.PersistenceService",
    };

    private static Object services[] = {
        ServiceUtil.createPrivilegedProxy(BasicService.class, new XBasicService()),
        ServiceUtil.createPrivilegedProxy(DownloadService.class, new XDownloadService()),
        ServiceUtil.createPrivilegedProxy(ExtensionInstallerService.class, new XExtensionInstallerService()),
        ServiceUtil.createPrivilegedProxy(PersistenceService.class, new XPersistenceService()),
    };


    public XServiceManagerStub() {
    }

    /**
     * Returns the service names.
     */
    public String[] getServiceNames() {
        // make sure it is a copy because we might be returning to
        // code we don't own.
        String result[] = new String[serviceNames.length];
        System.arraycopy(serviceNames, 0, result, 0, serviceNames.length);

        return result;
    }

    /**
     * Returns the service.
     *
     * @throws UnavailableServiceException if service is not available
     */
    public Object lookup(String name) throws UnavailableServiceException {
        // exact match
        for (int i=0; i < serviceNames.length; i++)
            if (serviceNames[i].equals(name))
                return services[i];

        // substring match
        for (int i=0; i < serviceNames.length; i++)
            if (-1 != serviceNames[i].indexOf(name))
                return services[i];

        throw new UnavailableServiceException(""+name);
    }

}


