/*******************************************************************************
* 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.impl;
import java.util.*;
import org.w3c.dom.*;
import org.jboss.tools.common.meta.*;
public class XChildrenImpl implements XMetaDataConstants {
protected XChild[] children = new XChild[0];
protected HashMap<String,XChild> children_map = new HashMap<String,XChild>(10);
private Set<String> requiredChildren = new HashSet<String>();
public XChildrenImpl() {}
public XChild getChild(String entityName) {
return children_map.get(entityName);
}
public XChild[] getChildren() {
return children;
}
/**
* Returns copy of set with names of required child entities.
*
* @return
*/
public Set<String> getRequiredChildren() {
return (requiredChildren.isEmpty()) ? Collections.<String>emptySet() : new HashSet<String>(requiredChildren);
}
public void load(Element el) {
Element p = XMetaDataLoader.getUniqueChild(el, XMODEL_CHILDREN);
if(p == null) return;
ArrayList<XChild> c = new ArrayList<XChild>();
Element[] es = XMetaDataLoader.getChildrenElements(p, XMODEL_CHILD);
for (int i = 0; i < es.length; i++) {
XChildImpl m = new XChildImpl();
m.load(es[i]);
children_map.put(m.getName(), m);
c.add(m);
if(m.getMaxCount() == 1 && m.isRequired()) {
requiredChildren.add(m.getName());
}
}
children = c.toArray(new XChild[0]);
}
void validate(XModelMetaData meta) {
String[] ns = children_map.keySet().toArray(new String[0]);
ArrayList<XChild> c = new ArrayList<XChild>();
for (int i = 0; i < children.length; i++) {
String n = children[i].getName();
if(meta.getEntity(n) == null) children_map.remove(n);
else c.add(children_map.get(n));
}
if(children_map.size() < ns.length)
children = c.toArray(new XChild[0]);
}
void merge(XChild[] ext) {
ArrayList<XChild> l = new ArrayList<XChild>();
for (int i = 0; i < ext.length; i++) {
String n = ext[i].getName();
if(children_map.get(n) != null) continue;
children_map.put(n, ext[i]);
l.add(ext[i]);
}
if(l.size() == 0) return;
XChild[] nc = new XChild[children.length + l.size()];
for (int i = 0; i < children.length; i++) nc[i] = children[i];
for (int i = 0; i < l.size(); i++) nc[children.length + i] = l.get(i);
children = nc;
}
}