001// Copyright 2004, 2005 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry.bean; 016 017/** 018 * Used to emit a stream of alterating string values: "even", "odd", etc. This 019 * is often used in the Inspector pages to make the class of a <tr> alternate 020 * for presentation reasons. 021 * 022 * @author Howard Lewis Ship 023 * 024 **/ 025 026public class EvenOdd 027{ 028 private boolean even = true; 029 030 /** 031 * Returns "even" or "odd". Whatever it returns on one invocation, it will 032 * return the opposite on the next. By default, the first value 033 * returned is "even". 034 * 035 **/ 036 037 public String getNext() 038 { 039 String result = even ? "even" : "odd"; 040 041 even = !even; 042 043 return result; 044 } 045 046 public boolean isEven() 047 { 048 return even; 049 } 050 051 /** 052 * Overrides the even flag. 053 * 054 **/ 055 056 public void setEven(boolean value) 057 { 058 even = value; 059 } 060}