using System;
using System.IO;
using System.Text;
using System.Collections;

/// <summary>
/// This class was first written by Drew Noakes in Java.
///
/// This is public domain software - that is, you can do whatever you want
/// with it, and include it software that is licensed under the GNU or the
/// BSD license, or whatever other licence you choose, including proprietary
/// closed source licenses.  I do ask that you leave this header in tact.
///
/// If you make modifications to this code that you think would benefit the
/// wider community, please send me a copy and I'll post it on my site.
///
/// If you make use of this code, Drew Noakes will appreciate hearing 
/// about it: <a href="mailto:drew@drewnoakes.com">drew@drewnoakes.com</a>
///
/// Latest Java version of this software kept at 
/// <a href="http://drewnoakes.com">http://drewnoakes.com/</a>
///
/// The C# class was made by Ferret Renaud: 
/// <a href="mailto:renaud91@free.fr">renaud91@free.fr</a>
/// If you find a bug in the C# code, feel free to mail me.
/// </summary>
namespace com.drew.metadata
{
	/// <summary>
	/// This interface represents a Metadata reader object
	/// </summary>
	public interface MetadataReader
	{
		/// <summary>
		/// Extracts metadata
		/// </summary>
		/// <returns>the metadata found</returns>
		Metadata Extract();

		/// <summary>
		/// Extracts metadata
		/// </summary>
		/// <param name="metadata">where to add metadata</param>
		/// <returns>the metadata found</returns>
		Metadata Extract(Metadata metadata);
	}
}