| /* |
| * $Id$ |
| * |
| * Copyright 2006 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.struts2.util; |
| |
| import java.io.Serializable; |
| |
| |
| /** |
| * A bean that can be used to keep track of a counter. |
| * <p/> |
| * Since it is an Iterator it can be used by the iterator tag |
| * |
| */ |
| public class Counter implements java.util.Iterator, Serializable { |
| |
| private static final long serialVersionUID = 2796965884308060179L; |
| |
| boolean wrap = false; |
| |
| // Attributes ---------------------------------------------------- |
| long first = 1; |
| long current = first; |
| long interval = 1; |
| long last = -1; |
| |
| |
| public void setAdd(long addition) { |
| current += addition; |
| } |
| |
| public void setCurrent(long current) { |
| this.current = current; |
| } |
| |
| public long getCurrent() { |
| return current; |
| } |
| |
| public void setFirst(long first) { |
| this.first = first; |
| current = first; |
| } |
| |
| public long getFirst() { |
| return first; |
| } |
| |
| public void setInterval(long interval) { |
| this.interval = interval; |
| } |
| |
| public long getInterval() { |
| return interval; |
| } |
| |
| public void setLast(long last) { |
| this.last = last; |
| } |
| |
| public long getLast() { |
| return last; |
| } |
| |
| // Public -------------------------------------------------------- |
| public long getNext() { |
| long next = current; |
| current += interval; |
| |
| if (wrap && (current > last)) { |
| current -= ((1 + last) - first); |
| } |
| |
| return next; |
| } |
| |
| public long getPrevious() { |
| current -= interval; |
| |
| if (wrap && (current < first)) { |
| current += (last - first + 1); |
| } |
| |
| return current; |
| } |
| |
| public void setWrap(boolean wrap) { |
| this.wrap = wrap; |
| } |
| |
| public boolean isWrap() { |
| return wrap; |
| } |
| |
| public boolean hasNext() { |
| return ((last == -1) || wrap) ? true : (current <= last); |
| } |
| |
| public Object next() { |
| return new Long(getNext()); |
| } |
| |
| public void remove() { |
| // Do nothing |
| } |
| } |