| /* |
| * Copyright (c) 2003 The Visigoth Software Society. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowledgement: |
| * "This product includes software developed by the |
| * Visigoth Software Society (http://www.visigoths.org/)." |
| * Alternately, this acknowledgement may appear in the software itself, |
| * if and wherever such third-party acknowledgements normally appear. |
| * |
| * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the |
| * project contributors may be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact visigoths@visigoths.org. |
| * |
| * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth" |
| * nor may "FreeMarker" or "Visigoth" appear in their names |
| * without prior written permission of the Visigoth Software Society. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Visigoth Software Society. For more |
| * information on the Visigoth Software Society, please see |
| * http://www.visigoths.org/ |
| */ |
| |
| package freemarker.core; |
| |
| import freemarker.template.SimpleNumber; |
| import freemarker.template.TemplateModel; |
| import freemarker.template.TemplateModelException; |
| import freemarker.template.TemplateSequenceModel; |
| |
| /** |
| * A class that represents a Range between two integers. |
| * inclusive of the end-points. It can be ascending or |
| * descending. |
| * @author <a href="mailto:jon@revusky.com">Jonathan Revusky</a> |
| */ |
| class NumericalRange implements TemplateSequenceModel, java.io.Serializable { |
| |
| private int lower, upper; |
| private boolean descending, norhs; // if norhs is true, then we have a half-range, like n.. |
| |
| |
| /** |
| * Constructor for half-range, i.e. n.. |
| */ |
| public NumericalRange(int lower) { |
| this.norhs = true; |
| this.lower = lower; |
| } |
| |
| public NumericalRange(int left, int right) { |
| lower = Math.min(left, right); |
| upper = Math.max(left, right); |
| descending = (left != lower); |
| } |
| |
| public TemplateModel get(int i) throws TemplateModelException { |
| int index = descending ? (upper -i) : (lower + i); |
| if ((norhs && index > upper) || index <lower) { |
| throw new _TemplateModelException(new Object[] { |
| "Range item index ", new Integer(i), " is out of bounds." }); |
| } |
| return new SimpleNumber(index); |
| } |
| |
| public int size() { |
| return 1 + upper - lower; |
| } |
| |
| boolean hasRhs() { |
| return !norhs; |
| } |
| } |
| |