/*
* @(#)$Id: AttributeState.java 1566 2003-06-09 20:37:49Z kk122374 $
*
* Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the proprietary information of Sun Microsystems, Inc.
* Use is subject to license terms.
*
*/
package com.sun.msv.reader.relax.core;
import org.relaxng.datatype.DatatypeException;
import com.sun.msv.grammar.Expression;
import com.sun.msv.grammar.SimpleNameClass;
import com.sun.msv.reader.ExpressionState;
import com.sun.msv.reader.State;
import com.sun.msv.reader.datatype.xsd.FacetStateParent;
import com.sun.msv.reader.datatype.xsd.XSTypeIncubator;
import com.sun.msv.util.StartTagInfo;
/**
* parses <attribute> element.
*
* @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
*/
public class AttributeState extends ExpressionState implements FacetStateParent
{
protected XSTypeIncubator incubator;
public XSTypeIncubator getIncubator() { return incubator; }
protected void startSelf() {
super.startSelf();
final RELAXCoreReader reader = (RELAXCoreReader)this.reader;
String type = startTag.getAttribute("type");
if(type==null) type="string";
incubator = reader.resolveXSDatatype(type).createIncubator();
}
protected Expression makeExpression() {
try {
final String name = startTag.getAttribute("name");
final String required = startTag.getAttribute("required");
if( name==null ) {
reader.reportError( RELAXCoreReader.ERR_MISSING_ATTRIBUTE, "attribute","name" );
// recover by ignoring this attribute.
// since attributes are combined by sequence, so epsilon is appropriate.
return Expression.epsilon;
}
Expression exp = reader.pool.createAttribute(
new SimpleNameClass("",name),
incubator.derive(null,null) );
// unless required attribute is specified, it is considered optional
if(! "true".equals(required) )
exp = reader.pool.createOptional(exp);
return exp;
} catch( DatatypeException e ) {
// derivation failed
reader.reportError( e, RELAXCoreReader.ERR_BAD_TYPE, e.getMessage() );
// recover by using harmless expression. anything will do.
return Expression.anyString;
}
}
protected State createChildState( StartTagInfo tag ) {
return ((RELAXCoreReader)reader).createFacetState(this,tag); // facets
}
}