/* XMLResolver.java -- 
   Copyright (C) 2005,2006  Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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02110-1301 USA.

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package javax.xml.stream;

/**
 * Interface used to resolve XML external entities during parsing.
 */
public interface XMLResolver
{

  /**
   * Returns an input source from which the specified external entity can be
   * read. The following return types are possible:
   * <ol>
   * <li><code>java.io.InputStream</code></li>
   * <li><code>javax.xml.stream.XMLStreamReader</code></li>
   * <li><code>java.xml.stream.XMLEventReader</code></li>
   * </ol>
   * If <code>null</code> is returned, the processor will attempt to resolve
   * the entity itself.
   * @param publicID the public ID of the external entity
   * @param systemID the system ID of the external entity
   * @param baseURI the absolute base URI of the referring entity
   * @param namespace the namespace of the external entity
   */
  Object resolveEntity(String publicID, String systemID,
                       String baseURI, String namespace)
    throws XMLStreamException;

}