content: package com.japisoft.framework.xml.grammar.xsd;
  
  import org.w3c.dom.Element;
  
  import com.japisoft.framework.xml.grammar.GrammarAttribute;
  import com.japisoft.framework.xml.grammar.GrammarText;
  
  /**
  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 XSDGrammarAttribute extends XSDGrammarNode implements GrammarAttribute {
  
  	public XSDGrammarAttribute( XSDGrammar grammar, Element attributeDef ) {
  		super( grammar, attributeDef );
  		minOccurs = 0;	// Optional by default
  		if ( "required".equalsIgnoreCase(
  				attributeDef.getAttribute( "use" ) ) ) {
  			minOccurs = 1;
  		}
  		if ( attributeDef.hasAttribute( "default" ) ) {
  			defaultValue = new XSDGrammarText(
  				grammar,
  				attributeDef.getAttribute( "default" ) 
  			);
  		}
  	}
  
  	public boolean isRequired() {
  		return ( minOccurs > 0 );
  	}	
  
  	public String infer() {
  		return getName() + "=\"" + ( getDefaultValue() == null ? getType().infer() : getDefaultValue() ) + "\"";
  	}	
  	
  	@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 "?";
  	}
  
  	private GrammarText defaultValue = null;
  
  	public GrammarText getDefaultValue() {
  		return defaultValue;
  	}
  
  }
  