001/*
002 * Copyright 2002-2012 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.web.multipart.support;
018
019import java.beans.PropertyEditorSupport;
020import java.io.IOException;
021
022import org.springframework.web.multipart.MultipartFile;
023
024/**
025 * Custom {@link java.beans.PropertyEditor} for converting
026 * {@link MultipartFile MultipartFiles} to Strings.
027 *
028 * <p>Allows one to specify the charset to use.
029 *
030 * @author Juergen Hoeller
031 * @since 13.10.2003
032 */
033public class StringMultipartFileEditor extends PropertyEditorSupport {
034
035        private final String charsetName;
036
037
038        /**
039         * Create a new {@link StringMultipartFileEditor}, using the default charset.
040         */
041        public StringMultipartFileEditor() {
042                this.charsetName = null;
043        }
044
045        /**
046         * Create a new {@link StringMultipartFileEditor}, using the given charset.
047         * @param charsetName valid charset name
048         * @see java.lang.String#String(byte[],String)
049         */
050        public StringMultipartFileEditor(String charsetName) {
051                this.charsetName = charsetName;
052        }
053
054
055        @Override
056        public void setAsText(String text) {
057                setValue(text);
058        }
059
060        @Override
061        public void setValue(Object value) {
062                if (value instanceof MultipartFile) {
063                        MultipartFile multipartFile = (MultipartFile) value;
064                        try {
065                                super.setValue(this.charsetName != null ?
066                                                new String(multipartFile.getBytes(), this.charsetName) :
067                                                new String(multipartFile.getBytes()));
068                        }
069                        catch (IOException ex) {
070                                throw new IllegalArgumentException("Cannot read contents of multipart file", ex);
071                        }
072                }
073                else {
074                        super.setValue(value);
075                }
076        }
077
078}