/*
 	(c) Copyright 2008 Hewlett-Packard Development Company, LP
 	All rights reserved.
 	$Id$
*/

package run.support;

import java.util.*;

public class Arguments 
    {
    protected final Map<String, List<String>> map = new HashMap<String, List<String>>();
    
    public Arguments( String defaultName, String [] argStrings )
        {
        List<String> current = new ArrayList<String>();
        map.put( defaultName, current );
        for (String a: argStrings)
            {
            if (a.startsWith( "-"))
                {
                String keyString = a.substring( 1 );
                int eqPos = keyString.indexOf( '=' );
                if (eqPos < 0)
                    current = listForKey( keyString );
                else
                    {
                    String key = keyString.substring( 0, eqPos );
                    String value = keyString.substring( eqPos + 1 );
                    listForKey( key ).add( value );
                    }
                }
            else
                current.add( a );
            }
        }
    
    protected List<String> listForKey( String key )
        {
        List<String> result = map.get( key );
        if (result == null) map.put( key, result = new ArrayList<String>() );
        return result;
        }
    
    public List<String> valuesFor( String key )
        {
        List<String> values = map.get( key );
        return values == null ? new ArrayList<String>() : values;
        }
    
    public String valueFor( String key, String ifAbsent )
        {
        List<String> values = map.get( key );
        return values == null || values.isEmpty() ? ifAbsent : values.get( 0 );
        }
    }