com.sun.msv.reader.xmlschema.GroupState Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jaxb-extra-osgi Show documentation
JAXB extra OSGI bundle
There is a newer version: 2.3.0
/*
 * Copyright (c) 2001-2013 Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

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.GroupDeclExp;
import com.sun.msv.grammar.xmlschema.XMLSchemaSchema;
import com.sun.msv.reader.State;
import com.sun.msv.util.StartTagInfo;

/**
 * used to parse <group> element.
 * 
 * @author Kohsuke KAWAGUCHI
 */
public class GroupState extends RedefinableDeclState {
    
    protected State createChildState( StartTagInfo tag ) {
        final XMLSchemaReader reader = (XMLSchemaReader)this.reader;
        // TODO: group reference is prohibited under group element.
        return reader.createModelGroupState(this,tag);
    }

    protected ReferenceContainer getContainer() {
        return ((XMLSchemaReader)reader).currentSchema.groupDecls;
    }
    
    protected Expression initialExpression() {
        final XMLSchemaReader reader = (XMLSchemaReader)this.reader;
        
        if( startTag.containsAttribute("ref") ) {
            // this this tag has @ref.
            Expression exp = reader.resolveQNameRef(
                startTag, "ref",
                new XMLSchemaReader.RefResolver() {
                    public ReferenceContainer get( XMLSchemaSchema g ) {
                        return g.groupDecls;
                    }
                } );
            if( exp==null )        return Expression.epsilon;    // couldn't resolve QName.
            return exp;
        }
        
        return null;    // use null to indicate that there is no child expression.
    }

    protected Expression castExpression( Expression halfCastedExpression, Expression newChildExpression ) {
        if( halfCastedExpression!=null ) {
            reader.reportError( XMLSchemaReader.ERR_MORE_THAN_ONE_CHILD_EXPRESSION );
            return halfCastedExpression;
        }
        
        return newChildExpression;    // the first one.
    }
    
    
    protected Expression annealExpression(Expression contentType) {
        final XMLSchemaReader reader = (XMLSchemaReader)this.reader;
        
        if( !isGlobal() )        return contentType;
        
        
        // this  element is global.
        // register this as a global group definition.
            
        String name = startTag.getAttribute("name");
        if( name==null ) {
            reader.reportError( XMLSchemaReader.ERR_MISSING_ATTRIBUTE, "group", "name" );
            // recover by returning a meaningless value, thereby ignoring this declaration.
            return Expression.nullSet;
        }
        
        if( contentType==null ) {
            reader.reportError( XMLSchemaReader.ERR_MISSING_CHILD_EXPRESSION );
            return Expression.nullSet;
        }
        
        GroupDeclExp decl;
        if( isRedefine() )
            decl = (GroupDeclExp)super.oldDecl;
        else {
            decl = reader.currentSchema.groupDecls.getOrCreate(name);
            if( decl.exp!=null )
                reader.reportError( 
                    new Locator[]{this.location,reader.getDeclaredLocationOf(decl)},
                    XMLSchemaReader.ERR_DUPLICATE_GROUP_DEFINITION,
                    new Object[]{name} );
        }
        reader.setDeclaredLocationOf(decl);
        decl.exp = contentType;

        return decl;
    }
}