GetORBPropertiesFileAction.java

/*
 * Copyright (c) 1999, 2001, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
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 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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/*
 * (C) Copyright IBM Corp. 1993 - 1997 - All Rights Reserved
 *
 * The original version of this source code and documentation is
 * copyrighted and owned by IBM, Inc. These materials are provided under
 * terms of a License Agreement between IBM and Sun. This technology is
 * protected by multiple US and International patents. This notice and
 * attribution to IBM may not be removed.
 *
 */

package javax.rmi.CORBA;

import java.io.File;
import java.io.FileInputStream;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Properties;

class GetORBPropertiesFileAction implements PrivilegedAction<Object>
{
    private boolean debug = false;

    public GetORBPropertiesFileAction()
    {
    }

    private String getSystemProperty(final String name)
    {
        // This will not throw a SecurityException because this
        // class was loaded from rt.jar using the bootstrap classloader.
        String propValue = AccessController.doPrivileged(new PrivilegedAction<String>()
        {
            public java.lang.String run()
            {
                return System.getProperty(name);
            }
        });

        return propValue;
    }

    private void getPropertiesFromFile(Properties props, String fileName)
    {
        try
        {
            File file = new File(fileName);
            if (!file.exists())
                return;

            FileInputStream in = new FileInputStream(file);

            try
            {
                props.load(in);
            }
            finally
            {
                in.close();
            }
        }
        catch (Exception exc)
        {
            if (debug)
                System.out.println("ORB properties file " + fileName + " not found: " + exc);
        }
    }

    public Object run()
    {
        Properties defaults = new Properties();

        String javaHome = getSystemProperty("java.home");
        String fileName = javaHome + File.separator + "lib" + File.separator + "orb.properties";

        getPropertiesFromFile(defaults, fileName);

        Properties results = new Properties(defaults);

        String userHome = getSystemProperty("user.home");
        fileName = userHome + File.separator + "orb.properties";

        getPropertiesFromFile(results, fileName);
        return results;
    }
}