001// Copyright 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.form.translator; 016 017import java.util.Locale; 018 019import org.apache.hivemind.util.PropertyUtils; 020import org.apache.tapestry.form.IFormComponent; 021import org.apache.tapestry.form.ValidationMessages; 022 023/** 024 * A trivial {@link Translator} implementation. By default, empty text submissions are interpretted 025 * as null. 026 * 027 * @author Paul Ferraro 028 * @since 4.0 029 */ 030public class StringTranslator extends AbstractTranslator 031{ 032 033 private String _empty = null; 034 035 public StringTranslator() 036 { 037 } 038 039 // Needed until HIVEMIND-134 fix is available 040 041 public StringTranslator(String initializer) 042 { 043 PropertyUtils.configureProperties(this, initializer); 044 } 045 046 /** 047 * @see org.apache.tapestry.form.translator.AbstractTranslator#parseText(org.apache.tapestry.form.IFormComponent, 048 * ValidationMessages, java.lang.String) 049 */ 050 protected Object parseText(IFormComponent field, ValidationMessages messages, String text) 051 { 052 return text; 053 } 054 055 /** 056 * @see org.apache.tapestry.form.translator.AbstractTranslator#formatObject(org.apache.tapestry.form.IFormComponent, 057 * Locale, java.lang.Object) 058 */ 059 protected String formatObject(IFormComponent field, Locale locale, Object object) 060 { 061 return object.toString(); 062 } 063 064 public Object getValueForEmptyInput() 065 { 066 return _empty; 067 } 068 069 public void setEmpty(String empty) 070 { 071 _empty = empty; 072 } 073 074}