content: package com.japisoft.framework.xml.grammar.xsd;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.w3c.dom.Element;
  
  import com.japisoft.framework.xml.grammar.GrammarAttribute;
  import com.japisoft.framework.xml.grammar.GrammarElement;
  import com.japisoft.framework.xml.grammar.GrammarNode;
  import com.japisoft.framework.xml.grammar.GrammarType;
  
  /**
  This program is available under two licenses : 
  
  1. For non commercial usage : 
  
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  2. For commercial usage :
  
  You need to get a commercial license for source usage at : 
  
  http://www.editix.com/buy.html
  
  Copyright (c) 2018 Alexandre Brillant - JAPISOFT SARL - http://www.japisoft.com
  
  @author Alexandre Brillant - abrillant@japisoft.com
  @author JAPISOFT SARL - http://www.japisoft.com
  
  */
  public class XSDGrammarElement extends XSDGrammarNode 
  		implements GrammarElement {
  
  	public XSDGrammarElement( 
  		XSDGrammar grammar, 
  		Element node ) {
  		super( grammar, node );
  	}
  
  	public boolean isEmpty() {
  		GrammarType type = getType();
  		return !type.isComplex();
  	}
  
  	public String infer() {
  		StringBuffer sb = new StringBuffer();
  		sb.append( "<" );
  		sb.append( getName() );
  
  		List<GrammarAttribute> l = getAttributes( true );
  		if ( l != null ) {
  			if ( l.size() > 0 ) {		
  				sb.append( " " );
  				for ( GrammarAttribute ga : l ) {
  					sb.append( ga.infer() );
  				}
  			}
  		}
  		if ( isEmpty() ) {
  			sb.append( "/>" );
  		} else {
  			sb.append( ">" );
  			sb.append( "</" ).append( getName() ).append( ">" );
  		}
  
  		return sb.toString();
  	}
  
  	public List<GrammarAttribute> getAttributes( boolean required ) {
  		List<GrammarNode> values = getType().getValues();
  		if ( values != null ) {
  			List<GrammarAttribute> attributes = new ArrayList<GrammarAttribute>();
  			for ( GrammarNode gn : values ) {
  				if ( gn instanceof GrammarAttribute ) {
  					if ( required && !( ( GrammarAttribute )gn ).isRequired() )
  						continue;
  					attributes.add( ( GrammarAttribute )gn );
  				}
  			}
  			return attributes;
  		}
  		return null;
  	}
  
  	@Override
  	public String getName() {
  		Element e = getDOMElement();
  		if ( e.hasAttribute( "name" ) )
  			return e.getAttribute( "name" );
  		else
  			if ( e.hasAttribute( "ref" ) )
  				return e.getAttribute( "ref" );
  			else
  				return "?";
  	}
  
  }
  