/*
* @(#)$Id: AttributeGroupState.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.xmlschema;
import org.xml.sax.Locator;
import com.sun.msv.grammar.Expression;
import com.sun.msv.grammar.ReferenceContainer;
import com.sun.msv.grammar.xmlschema.AttributeGroupExp;
import com.sun.msv.grammar.xmlschema.AttributeWildcard;
import com.sun.msv.grammar.xmlschema.XMLSchemaSchema;
import com.sun.msv.reader.State;
import com.sun.msv.util.StartTagInfo;
/**
* parses <attributeGroup /> element.
*
* @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
*/
public class AttributeGroupState extends RedefinableDeclState implements AnyAttributeOwner {
protected State createChildState( StartTagInfo tag ) {
final XMLSchemaReader reader = (XMLSchemaReader)this.reader;
return reader.createAttributeState(this,tag);
}
protected ReferenceContainer getContainer() {
return ((XMLSchemaReader)reader).currentSchema.attributeGroups;
}
protected Expression initialExpression() {
final XMLSchemaReader reader = (XMLSchemaReader)this.reader;
String refQName = startTag.getAttribute("ref");
if( refQName==null )
// child expressions are expected. (although it's optional)
return Expression.epsilon;
Expression exp = reader.resolveQNameRef(
startTag, "ref",
new XMLSchemaReader.RefResolver() {
public ReferenceContainer get( XMLSchemaSchema g ) {
return g.attributeGroups;
}
} );
if( exp==null ) return Expression.epsilon; // couldn't resolve QName.
return exp;
}
private AttributeWildcard wildcard;
public void setAttributeWildcard( AttributeWildcard local ) {
this.wildcard = local;
}
protected Expression castExpression( Expression halfCastedExpression, Expression newChildExpression ) {
if( startTag.containsAttribute("ref") )
reader.reportError( XMLSchemaReader.ERR_MORE_THAN_ONE_CHILD_EXPRESSION );
if( halfCastedExpression==null )
return newChildExpression; // the first one.
return reader.pool.createSequence( newChildExpression, halfCastedExpression );
}
protected Expression annealExpression(Expression contentType) {
final XMLSchemaReader reader = (XMLSchemaReader)this.reader;
if( !isGlobal() ) return contentType;
// if this is a global declaration register it.
String name = startTag.getAttribute("name");
if( name==null ) {
reader.reportError( XMLSchemaReader.ERR_MISSING_ATTRIBUTE, "attributeGroup", "name" );
return Expression.epsilon;
// recover by returning something meaningless.
// the parent state will ignore this.
}
AttributeGroupExp exp;
if( isRedefine() )
exp = (AttributeGroupExp)super.oldDecl;
else {
exp = reader.currentSchema.attributeGroups.getOrCreate(name);
if( exp.exp!=null )
reader.reportError(
new Locator[]{this.location,reader.getDeclaredLocationOf(exp)},
XMLSchemaReader.ERR_DUPLICATE_ATTRIBUTE_GROUP_DEFINITION,
new Object[]{name} );
}
reader.setDeclaredLocationOf(exp);
exp.exp = contentType;
exp.wildcard = this.wildcard;
return exp;
}
}