public final class QueueElement
{
	private final String _query;
	private final List<ElementPair> _pairs = new FastList<ElementPair>();
	
	public QueueElement(String query)
	{
		_query = query;
	}
	
	public void setInt(int index, int value)
	{
		_pairs.add(new ElementPair(Integer.class, value));
	}
	
	// ...
	
	private final class ElementPair
	{
		private final Class<?> _cl;
		private final Object _value;
		
		private ElementPair(Class<?> cl, Object value)
		{
			_cl = cl;
			_value = value;
		}
		
		private Class<?> getType()
		{
			return _cl;
		}
		
		private Object getValue()
		{
			return _value;
		}
	}
	
	public prepare(PreparedStatement ps)
	{
		for (ElementPair pair : _pairs)
		{
			if (pair.getType() == Integer.class)
				ps.setInt(pair.getValue());
			// ...
		}
	}
}