/*
 * @(#)$Id: GlobalDeclState.java,v 1.12 2003/06/09 20:37:34 kk122374 Exp $
 *
 * 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.grammar.Expression;
import com.sun.msv.grammar.xmlschema.SimpleTypeExp;
import com.sun.msv.reader.ExpressionOwner;
import com.sun.msv.reader.SimpleState;
import com.sun.msv.reader.State;
import com.sun.msv.reader.datatype.xsd.XSDatatypeExp;
import com.sun.msv.reader.datatype.xsd.XSTypeOwner;
import com.sun.msv.util.StartTagInfo;

/**
 * State that parses global declarations.
 * 
 * @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
 */
public class GlobalDeclState extends SimpleState
    implements ExpressionOwner,XSTypeOwner {
    
    protected State createChildState( StartTagInfo tag ) {
        final XMLSchemaReader reader = (XMLSchemaReader)this.reader;
        
        if(tag.localName.equals("include"))            return reader.sfactory.include(this,tag);
        if(tag.localName.equals("import"))            return reader.sfactory.import_(this,tag);
        if(tag.localName.equals("redefine"))        return reader.sfactory.redefine(this,tag);
        if(tag.localName.equals("simpleType"))        return reader.sfactory.simpleType(this,tag);
        if(tag.localName.equals("complexType"))        return reader.sfactory.complexTypeDecl(this,tag);
        if(tag.localName.equals("group"))            return reader.sfactory.group(this,tag);
        if(tag.localName.equals("attributeGroup"))    return reader.sfactory.attributeGroup(this,tag);
        if(tag.localName.equals("element"))            return reader.sfactory.elementDecl(this,tag);
        if(tag.localName.equals("attribute"))        return reader.sfactory.attribute(this,tag);
        if(tag.localName.equals("notation"))        return reader.sfactory.notation(this,tag);
        
        return null;
    }

    public String getTargetNamespaceUri() {
        final XMLSchemaReader reader = (XMLSchemaReader)this.reader;
        return reader.currentSchema.targetNamespace;
    }
    
    // do nothing. declarations register themselves by themselves.
    public void onEndChild( Expression exp ) {}
    
    public void onEndChild( XSDatatypeExp type ) {
        final XMLSchemaReader reader = (XMLSchemaReader)this.reader;
//        final XSDatatypeImpl dti = (XSDatatypeImpl)type;
//        final String typeName = dti.getName();
        
        String typeName = reader.getCurrentState().getStartTag().getAttribute("name");
        
        if( typeName==null ) {
            // top-level simpleType must define a named type
            reader.reportError( XMLSchemaReader.ERR_MISSING_ATTRIBUTE, "simpleType", "name" );
            return;    // recover by ignoring this declaration
        }
        
        // memorize this type.
        final SimpleTypeExp exp = reader.currentSchema.simpleTypes.getOrCreate(typeName);
        if(exp.getType()!=null ) {
            reader.reportError( XMLSchemaReader.ERR_DATATYPE_ALREADY_DEFINED, typeName );
            return;
            // recover by ignoring this declaration
        }
        
        exp.set(type);
        reader.setDeclaredLocationOf(exp);
    }
}
