/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.query.optimizer.xml;
import java.util.Properties;
import org.teiid.query.mapping.xml.MappingDocument;
import org.teiid.query.mapping.xml.MappingElement;
import org.teiid.query.mapping.xml.MappingNodeConstants;
import org.teiid.query.mapping.xml.MappingRecursiveElement;
import org.teiid.query.mapping.xml.MappingVisitor;
import org.teiid.query.mapping.xml.Namespace;
import org.teiid.query.mapping.xml.Navigator;
/**
* Removes the all the "excluded" nodes from the Mapping XML node tree
*/
public class HandleNillableVisitor extends MappingVisitor{
public void visit(MappingElement element) {
visitNode(element);
}
public void visit(MappingRecursiveElement element) {
visitNode(element);
}
void visitNode(MappingElement element) {
if (element.isNillable()) {
MappingDocument doc = element.getDocument();
// get the first visual node on the document.
MappingElement rootElement = doc.getTagRootElement();
Properties namespaces = rootElement.getNamespacesAsProperties();
if (namespaces == null || !namespaces.containsKey(MappingNodeConstants.INSTANCES_NAMESPACE_PREFIX)) {
rootElement.addNamespace(new Namespace(MappingNodeConstants.INSTANCES_NAMESPACE_PREFIX, MappingNodeConstants.INSTANCES_NAMESPACE));
}
// now exit; we are done
setAbort(true);
}
}
public static MappingDocument execute(MappingDocument doc) {
HandleNillableVisitor visitor = new HandleNillableVisitor();
doc.acceptVisitor(new Navigator(true, visitor));
return doc;
}
}