/*
* @(#)$Id: SimpleContentExtensionState.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 com.sun.msv.datatype.xsd.XSDatatype;
import com.sun.msv.grammar.Expression;
import com.sun.msv.grammar.ReferenceExp;
import com.sun.msv.grammar.xmlschema.AttributeWildcard;
import com.sun.msv.grammar.xmlschema.ComplexTypeExp;
import com.sun.msv.grammar.xmlschema.SimpleTypeExp;
import com.sun.msv.grammar.xmlschema.XMLSchemaSchema;
import com.sun.msv.reader.GrammarReader;
import com.sun.msv.reader.SequenceState;
import com.sun.msv.reader.State;
import com.sun.msv.reader.datatype.xsd.XSDatatypeExp;
import com.sun.msv.util.StartTagInfo;
/**
* used to parse extension element as a child of <simpleContent> element.
*
* @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
*/
public class SimpleContentExtensionState extends SequenceState
implements AnyAttributeOwner {
/** ComplexType object that we are now constructing. */
protected ComplexTypeExp parentDecl;
protected SimpleContentExtensionState( ComplexTypeExp parentDecl ) {
this.parentDecl = parentDecl;
}
public void setAttributeWildcard( AttributeWildcard local ) {
parentDecl.wildcard = local;
}
protected State createChildState( StartTagInfo tag ) {
final XMLSchemaReader reader = (XMLSchemaReader)this.reader;
return reader.createAttributeState(this,tag);
}
protected Expression initialExpression() {
// without this statement,
// <extension> without any attribute will be prohibited.
return Expression.epsilon;
}
protected Expression annealExpression( Expression exp ) {
parentDecl.derivationMethod = ComplexTypeExp.EXTENSION;
return reader.pool.createSequence(
super.annealExpression(exp),
getBody());
}
/**
* Gets the expression for the base type.
*/
private Expression getBody() {
final XMLSchemaReader reader = (XMLSchemaReader)this.reader;
final String base = startTag.getAttribute("base");
if(base==null) {
// in extension, base attribute must is mandatory.
reader.reportError( XMLSchemaReader.ERR_MISSING_ATTRIBUTE, startTag.localName, "base");
return Expression.nullSet;
}
final String[] baseTypeName = reader.splitQName(base);
if( baseTypeName==null ) {
reader.reportError( XMLSchemaReader.ERR_UNDECLARED_PREFIX, base );
return Expression.nullSet;
}
// we need a special handling for built-in types
if(reader.isSchemaNamespace(baseTypeName[0])) {
XSDatatype dt = reader.resolveBuiltinDataType(baseTypeName[1]);
if(dt!=null) {
XSDatatypeExp dtexp = new XSDatatypeExp(dt,reader.pool);
parentDecl.simpleBaseType = dtexp;
return dtexp;
}
// maybe we are parsing the schema for schema.
// consult externally specified schema.
}
final XMLSchemaSchema schema = reader.grammar.getByNamespace(baseTypeName[0]);
// we don't know whether it's a complex type or a simple type.
// so back patch it
final ReferenceExp ref = new ReferenceExp(null);
reader.addBackPatchJob( new GrammarReader.BackPatch(){
public State getOwnerState() {
return SimpleContentExtensionState.this;
}
public void patch() {
SimpleTypeExp sexp = schema.simpleTypes.get(baseTypeName[1]);
if(sexp!=null) {
// we've found the simple type
ref.exp = sexp;
parentDecl.simpleBaseType = sexp.getType();
_assert(parentDecl.simpleBaseType!=null);
return;
}
ComplexTypeExp cexp = schema.complexTypes.get(baseTypeName[1]);
if(cexp!=null) {
// we've found the complex type as the base type
ref.exp = cexp.body;
parentDecl.complexBaseType = cexp;
return;
}
// there is no base type.
reader.reportError( XMLSchemaReader.ERR_UNDEFINED_COMPLEX_OR_SIMPLE_TYPE, base );
}
});
return ref;
}
}