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.util.io; 016 017import org.apache.tapestry.services.DataSqueezer; 018 019/** 020 * Squeezes a {@link Boolean}. 021 * 022 * @author Howard Lewis Ship 023 */ 024 025public class BooleanAdaptor implements SqueezeAdaptor 026{ 027 private static final String PREFIX = "TF"; 028 029 public String getPrefix() 030 { 031 return PREFIX; 032 } 033 034 public Class getDataClass() 035 { 036 return Boolean.class; 037 } 038 039 /** 040 * Squeezes the {@link Boolean}data to either 'T' or 'F'. 041 */ 042 043 public String squeeze(DataSqueezer squeezer, Object data) 044 { 045 Boolean bool = (Boolean) data; 046 047 return bool.booleanValue() ? "T" : "F"; 048 } 049 050 /** 051 * Unsqueezes the string to either {@link Boolean#TRUE}or {@link Boolean#FALSE}, depending on 052 * the prefix character. 053 */ 054 055 public Object unsqueeze(DataSqueezer squeezer, String string) 056 { 057 char ch = string.charAt(0); 058 059 if (ch == 'T') 060 return Boolean.TRUE; 061 062 return Boolean.FALSE; 063 } 064 065}