head	1.1;
access;
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	TIGRIS_1_1_0RC2:1.1.4.1
	TIGRIS_1_1:1.1.0.4
	TIGRIS_1_0:1.1.0.2;
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1.1
date	2001.07.19.18.39.24;	author dlr;	state Exp;
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	1.1.2.1
	1.1.4.1;
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1.1.2.1
date	2001.08.06.22.59.55;	author jrobbins;	state Exp;
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1.1.4.1
date	2001.08.06.23.39.16;	author jrobbins;	state Exp;
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1.1
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@/* ================================================================
 * Copyright (c) 2000 CollabNet.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * 3. The end-user documentation included with the redistribution, if
 * any, must include the following acknowlegement: "This product includes
 * software developed by CollabNet (http://www.CollabNet/)."
 * Alternately, this acknowlegement may appear in the software itself, if
 * and wherever such third-party acknowlegements normally appear.
 * 
 * 4. The hosted project names must not be used to endorse or promote
 * products derived from this software without prior written
 * permission. For written permission, please contact info@@collab.net.
 * 
 * 5. Products derived from this software may not use the "Tigris" name
 * nor may "Tigris" appear in their names without prior written
 * permission of CollabNet.
 * 
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL COLLAB.NET OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by many
 * individuals on behalf of CollabNet.
 */

package org.tigris.helm.tool;

import java.io.*;
import java.util.*;

import org.apache.turbine.util.Log;

/**
 * Holds onto a properties object to make it available everywhere
 *
 * @@author <a href="mailto:davidp@@dataweb-systems.com">David C. Pellegrini</a>
 * @@author <a href="mailto:dlr@@collab.net">Daniel Rall</a>
 * @@version $Revision: 1.10 $
 *
 * Copyright (c) 1999 dataweb systems, inc.
 * Copyright (c) 1999-2001 CollabNet, Inc.
 */
public class HelmProperties
{
    /**
     * The single instance.
     */
    private static HelmProperties theInstance = new HelmProperties();

    /**
     * Whether the properties have been initialized.
     */
    private boolean isInitialized;

    /**
     * Private state.
     */
    private Properties properties;

    /**
     * Make a private constructor else it's possible to get an instance
     * of this class w/ 'new HelmProperties'.  Needed because intent is 
     * the singleton pattern w/ this.getInstance( ) as the sole method 
     * to a single instance.
     */
    private HelmProperties()
    {
        isInitialized = false;
        properties = null;
    }
    
    /**
     * Configures and returns the singleton instance of HelmProperties
     *
     * @@return The HelmProperties instance.
     */
    public static HelmProperties getInstance()
    {
        return theInstance;
    }

    /**
     * Set the properties to its initial value.
     *
     * @@param props The properties to initialize this to.
     */
    public void init(Properties props)
    {
        if (!isInitialized)
        {
            synchronized (HelmProperties.class)
            {
                properties = new Properties();
                merge(props);
                isInitialized = true;
            }
        }
    }

    /**
     * Merges the provided properties into the current state.
     */
    private void merge(Properties props)
    {
        Enumeration names = props.propertyNames();
        String name;
        while (names.hasMoreElements())
        {
            name = (String)names.nextElement();
            properties.setProperty(name, props.getProperty(name));
        }
    }

    /**
     * Get the properties.
     *
     * @@return The internal properties.
     */
    public Properties getProperties()
    {
        return properties;
    }

    /**
     * Get a property by name.
     *
     * @@param name The property name.
     * @@return     The value of the named property, or <code>null</code>.
     */
    public static String getProperty(String name)
    {
        return (getInstance().isInitialized ? 
                getInstance().getProperties().getProperty(name) : 
                null);
    }
}
@


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@adding files and code from head needed for new runScripts() done by leonardr
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