com.sun.javafx.sg.prism.NodePath Maven / Gradle / Ivy
/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
package com.sun.javafx.sg.prism;
import java.util.ArrayList;
import java.util.List;
/**
* Simple a reusable storage for root-to-node path.
*
*/
public class NodePath {
private List path = new ArrayList<>();
private int position;
public NGNode last() {
return path.isEmpty() ? null : path.get(path.size() - 1);
}
// ITERATION methods
public NGNode getCurrentNode() {
return path.get(position);
}
public boolean hasNext() {
return position < path.size() -1 && !isEmpty();
}
public void next() {
if (!hasNext()) {
throw new IllegalStateException();
}
position++;
}
public void reset() {
position = path.isEmpty() ? -1 : 0;
}
// MODIFICATION methods
public void clear() {
position = -1;
path.clear();
}
public void add(NGNode n) {
path.add(0, n);
if (position == -1) position = 0;
}
public int size() {
return path.size();
}
public boolean isEmpty() {
return path.isEmpty();
}
@Override public String toString() {
return path.toString();
}
}