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package com.sun.msv.reader.xmlschema;
import com.sun.msv.grammar.Expression;
import com.sun.msv.grammar.ReferenceContainer;
import com.sun.msv.grammar.xmlschema.XMLSchemaSchema;
import com.sun.msv.reader.ExpressionWithoutChildState;
/**
* used to parse <element > element with ref attribute.
*
* @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
*/
public class ElementRefState extends ExpressionWithoutChildState {
protected Expression makeExpression() {
final XMLSchemaReader reader = (XMLSchemaReader)this.reader;
// TODO: what attributes can be used with @ref?
if( !startTag.containsAttribute("ref") )
// existance of @ref must be checked before instanciation of this object.
throw new Error();
// this this tag has @ref.
Expression exp = reader.resolveQNameRef(
startTag, "ref",
new XMLSchemaReader.RefResolver() {
public ReferenceContainer get( XMLSchemaSchema g ) {
return g.elementDecls;
}
} );
if( exp==null ) return Expression.epsilon; // couldn't resolve QName.
// minOccurs/maxOccurs is processed through interception
return exp;
}
}