/*******************************************************************************
* Copyright (c) 2007 Exadel, Inc. and Red Hat, Inc.
* Distributed under license by Red Hat, Inc. All rights reserved.
* This program is made available under the terms of the
* Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Exadel, Inc. and Red Hat, Inc. - initial API and implementation
******************************************************************************/
package org.jboss.tools.common.meta.ui.editor;
import java.util.Hashtable;
import java.util.Properties;
import org.jboss.tools.common.meta.XAttribute;
import org.jboss.tools.common.meta.XChild;
import org.jboss.tools.common.meta.XModelEntity;
import org.jboss.tools.common.model.XModelObject;
import org.jboss.tools.common.model.util.XMLUtil;
import org.jboss.tools.common.model.util.XModelObjectLoaderUtil;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class MetaLoaderUtil extends XModelObjectLoaderUtil {
public MetaLoaderUtil() {
Hashtable _singular = new Hashtable();
_singular.put("kind", "kind"); //$NON-NLS-1$ //$NON-NLS-2$
setup(_singular, false);
}
public void load(Element element, XModelObject o) {
loadAttributes(element, o);
if(isLoadOrderedChildren(o)) {
loadChildrenOrdered(element, o);
} else {
loadChildren(element, o);
}
}
private static boolean isLoadOrderedChildren(XModelObject o) {
if(!(o instanceof MetaElementOrderedImpl)) return false;
if(o.getModelEntity().getChildren().length < 2) return false;
return true;
}
public void loadChildren(Element element, XModelObject o) {
XModelEntity entity = o.getModelEntity();
XChild[] childs = entity.getChildren();
for (int i = 0; i < childs.length; i++) if(childs[i].isRequired()) {
o.addChild(o.getModel().createModelObject(childs[i].getName(), new Properties()));
}
for (int i = 0; i < childs.length; i++) {
String en = childs[i].getName();
XModelEntity ce = entity.getMetaModel().getEntity(en);
Element[] es = XMLUtil.getAncestors(element, ce.getXMLSubPath());
for (int j = 0; j < es.length; j++) {
if(!en.equals(calculateEntity(es[j], en))) continue;
XModelObject c = o.getModel().createModelObject(en, new Properties());
boolean add = true;
if(childs[i].isRequired()) {
XModelObject q = o.getChildByPath(c.getPathPart());
if(q != null) {
c = q;
add = false;
}
}
load(es[j], c);
if(add) o.addChild(c);
}
}
}
public void loadChildrenOrdered(Element element, XModelObject o) {
XModelEntity entity = o.getModelEntity();
XChild[] childs = entity.getChildren();
XModelEntity[] es = new XModelEntity[childs.length];
for (int i = 0; i < es.length; i++)
es[i] = entity.getMetaModel().getEntity(childs[i].getName());
NodeList nl = element.getChildNodes();
for (int i = 0; i < nl.getLength(); i++) {
Node n = nl.item(i);
if(n.getNodeType() != Node.ELEMENT_NODE) continue;
Element ce = (Element)n;
String en = calculateEntity(ce, es);
XModelObject c = o.getModel().createModelObject(en, new Properties());
load(ce, c);
o.addChild(c);
}
}
private static String calculateEntity(Element element, XModelEntity[] es) {
String entity = getModelEntityAttribute(element);
if(entity != null) return entity;
String xml = element.getNodeName();
for (int i = 0; i < es.length; i++) {
if(xml.equals(es[i].getXMLSubPath()))
return calculateEntity(element, es[i].getName());
}
return null;
}
private static String calculateEntity(Element element, String def) {
String entity = getModelEntityAttribute(element);
if(entity != null) return entity;
if(def.equals("MetaActionList")) { //$NON-NLS-1$
String k = element.getAttribute("kind"); //$NON-NLS-1$
if("action".equals(k)) return "MetaAction"; //$NON-NLS-1$ //$NON-NLS-2$
}
return def;
}
public boolean save(Element parent, XModelObject o) {
if(!needToSave(o)) return true;
return super.save(parent, o);
}
boolean needToSave(XModelObject o) {
if(o == null) return false;
String entity = o.getModelEntity().getName();
if("MetaAttributeConstraint".equals(entity) //$NON-NLS-1$
|| "MetaAttributeEditor".equals(entity)) { //$NON-NLS-1$
return (hasSetAttributes(o)
|| o.getChildren().length > 0
);
}
return true;
}
private boolean hasSetAttributes(XModelObject o) {
XAttribute[] as = o.getModelEntity().getAttributes();
for (int i = 0; i < as.length; i++) {
String xml = as[i].getXMLName();
// it would be more safe to check isSavable
if(xml == null || xml.length() == 0 || "NAME".equals(xml)) continue; //$NON-NLS-1$
String v = o.getAttributeValue(as[i].getName());
if(v != null && v.length() > 0 && !v.equals(as[i].getDefaultValue())) return true;
}
String finalComment = o.get("#final-comment"); //$NON-NLS-1$
if(finalComment != null && finalComment.length() > 0) return true;
return false;
}
}