mirror of https://github.com/octoleo/plantuml.git
81 lines
2.0 KiB
Java
81 lines
2.0 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* (C) Copyright 2009-2017, Arnaud Roques
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*
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* Project Info: http://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* http://plantuml.com/patreon (only 1$ per month!)
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* http://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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*
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* Original Author: Arnaud Roques
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*
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*
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*/
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package net.sourceforge.plantuml.bpm;
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public final class Navigators {
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private Navigators() {
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}
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public static <O> Navigator<O> iterate(final Chain<O> orig, final O from, final O to) {
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if (orig.compare(from, to) <= 0) {
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return orig.navigator(from);
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}
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return reverse(orig.navigator(to));
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}
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public static <O> Navigator<O> reverse(final Navigator<O> orig) {
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return new Navigator<O>() {
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public O next() {
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return orig.previous();
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}
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public O previous() {
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return orig.next();
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}
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public O get() {
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return orig.get();
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}
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public void set(O data) {
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orig.set(data);
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}
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public void insertBefore(O data) {
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throw new UnsupportedOperationException();
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}
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public void insertAfter(O data) {
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throw new UnsupportedOperationException();
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}
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};
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}
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}
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