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/*
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */

package org.mule.util;

import java.util.Enumeration;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import java.util.Vector;

import org.apache.commons.collections.keyvalue.DefaultMapEntry;

public class OrderedProperties extends Properties
{

    private static final long serialVersionUID = -3611415251568805458L;

    private final Vector keys = new Vector();

    public OrderedProperties()
    {
        super();
    }

    public OrderedProperties(Properties defaults)
    {
        super(defaults);
    }

    @Override
    @SuppressWarnings("unchecked")
    public Set> entrySet()
    {
        Set> entries = new LinkedHashSet>();
        Enumeration keys = this.propertyNames();

        while (keys.hasMoreElements())
        {
            Object key = keys.nextElement();
            entries.add(new DefaultMapEntry(key, this.getProperty((String) key)));
        }

        return entries;
    }

    @Override
    public Enumeration propertyNames()
    {
        return this.keys.elements();
    }

    public Object put(Object key, Object value)
    {
        if (this.keys.contains(key))
        {
            this.keys.remove(key);
        }

        this.keys.add(key);

        return super.put(key, value);
    }

    public Object remove(Object key)
    {
        this.keys.remove(key);
        return super.remove(key);
    }
}
 















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