001/* 002 * Copyright 2002-2011 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.core.convert.support; 018 019import java.beans.PropertyEditorSupport; 020 021import org.springframework.core.convert.ConversionService; 022import org.springframework.core.convert.TypeDescriptor; 023import org.springframework.util.Assert; 024 025/** 026 * Adapter that exposes a {@link java.beans.PropertyEditor} for any given 027 * {@link org.springframework.core.convert.ConversionService} and specific target type. 028 * 029 * @author Juergen Hoeller 030 * @since 3.0 031 */ 032public class ConvertingPropertyEditorAdapter extends PropertyEditorSupport { 033 034 private final ConversionService conversionService; 035 036 private final TypeDescriptor targetDescriptor; 037 038 private final boolean canConvertToString; 039 040 041 /** 042 * Create a new ConvertingPropertyEditorAdapter for a given 043 * {@link org.springframework.core.convert.ConversionService} 044 * and the given target type. 045 * @param conversionService the ConversionService to delegate to 046 * @param targetDescriptor the target type to convert to 047 */ 048 public ConvertingPropertyEditorAdapter(ConversionService conversionService, TypeDescriptor targetDescriptor) { 049 Assert.notNull(conversionService, "ConversionService must not be null"); 050 Assert.notNull(targetDescriptor, "TypeDescriptor must not be null"); 051 this.conversionService = conversionService; 052 this.targetDescriptor = targetDescriptor; 053 this.canConvertToString = conversionService.canConvert(this.targetDescriptor, TypeDescriptor.valueOf(String.class)); 054 } 055 056 057 @Override 058 public void setAsText(String text) throws IllegalArgumentException { 059 setValue(this.conversionService.convert(text, TypeDescriptor.valueOf(String.class), this.targetDescriptor)); 060 } 061 062 @Override 063 public String getAsText() { 064 if (this.canConvertToString) { 065 return (String) this.conversionService.convert(getValue(), this.targetDescriptor, TypeDescriptor.valueOf(String.class)); 066 } 067 else { 068 return null; 069 } 070 } 071 072}