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Linguistic based techniques for text simplification

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/*
 * clean.jape
 *
 * Copyright (c) 2004-2013, The University of Sheffield.
 * 
 * This file is part of GATE (see http://gate.ac.uk/), and is free software,
 * Licensed under the GNU Library General Public License, Version 3, June 2007
 * (in the distribution as file licence.html, and also available at
 * http://gate.ac.uk/gate/licence.html).
 * 
 * Original version developed by Mark A. Greenwood as part of his PhD thesis.
 */

Phase: Clean
Input: Redundant
Options: control = appelt

Rule:Clean1
(
	{Redundant}
):replace
-->
{
	Annotation replace = bindings.get("replace").iterator().next();
	
	// get the start and end of this section
	Node start = replace.getStartNode();
	Node end = replace.getEndNode();
	
	AnnotationSet set = inputAS.get("Redundant",start.getOffset(),end.getOffset());
	
	if (set == null) return;
	
	long length = end.getOffset().longValue() - start.getOffset().longValue();
	
	inputAS.remove(replace);
	
	Iterator it = set.iterator();
	while (it.hasNext())
	{
		gate.Annotation a = (gate.Annotation)it.next();
		
		long nl = a.getEndNode().getOffset().longValue() - a.getStartNode().getOffset().longValue();
				
		if (nl > length)
		{
			inputAS.remove(replace);
			replace = a;
			length = nl;
		}
		else
		{
			inputAS.remove(a);
		}
	}
	
	outputAS.add(replace);
}