/*******************************************************************************
* 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.model.impl;
import java.util.*;
import org.jboss.tools.common.model.*;
public class XModelBufferImpl implements XModelBuffer {
private ArrayList<Pair> items = new ArrayList<Pair>();
public XModelBufferImpl() {}
public int getSize() {
return items.size();
}
public XModelObject source() {
return source(0);
}
public XModelObject copy() {
return copy(0);
}
Pair getItem(int i) {
return (getSize() <= i) ? null : (Pair)items.get(i);
}
public XModelObject source(int i) {
Pair p = getItem(i);
return (p == null) ? null : p.source;
}
public XModelObject copy(int i) {
Pair p = getItem(i);
return (p == null) ? null : p.copy();
}
public void setSource(XModelObject source) {
clear();
addSource(source);
}
public void addSource(XModelObject source) {
items.add(new Pair(source));
}
public void clear() {
items.clear();
}
class Pair {
XModelObject source = null;
XModelObject copy = null;
public Pair(XModelObject source) {
this.source = source;
}
public XModelObject copy() {
if(copy == null && source != null) copy = source.copy();
return copy;
}
}
}