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/*
 * $Id: ExtendedNamespaceContext.java,v 1.1 2004/07/05 23:10:46 cniles Exp $
 * 
 * Copyright (c) 2004, Christian Niles, unit12.net
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *		*   Redistributions of source code must retain the above copyright
 *          notice, this list of conditions and the following disclaimer.
 * 
 *	    *	Redistributions in binary form must reproduce the above copyright
 *          notice, this list of conditions and the following disclaimer in the
 *          documentation and/or other materials provided with the distribution.
 * 
 *      *   Neither the name of Christian Niles, Unit12, nor the names of its
 *          contributors may be used to endorse or promote products derived from
 *          this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 */
package javanet.staxutils;

import java.util.Iterator;

import javax.xml.namespace.NamespaceContext;

/**
 * Extended namespace context interface that allows the context tree to be navigated
 * and to list all known prefixes.
 * 
 * @author Christian Niles
 * @version $Revision: 1.1 $
 */
public interface ExtendedNamespaceContext extends NamespaceContext {

	/**
	 * Returns a reference to the parent of this context.
	 * 
	 * @return The parent context, or null if this is a root
	 * 		context.
	 */
    public NamespaceContext getParent();

	/**
	 * Determines if the specified prefix is declared within this context,
	 * irrespective of any ancestor contexts.
	 * 
	 * @param prefix The prefix to check.
	 * @return true if the prefix is declared in this context,
	 * 		false otherwise.
	 */
    public boolean isPrefixDeclared(String prefix);

	/**
	 * Returns an {@link Iterator} of all namespace prefixes in scope within this
	 * context, including those inherited from ancestor contexts.
	 * 
	 * @return An {@link Iterator} of prefix {@link String}s.
	 */
    public Iterator getPrefixes();

	/**
	 * Returns an {@link Iterator} of all namespace prefixes declared within
	 * this context, irrespective of any ancestor contexts.
	 * 
	 * @return An {@link Iterator} of prefix {@link String}s.
	 */
    public Iterator getDeclaredPrefixes();
    
}