1 /**************************************************************** 2 * Licensed to the Apache Software Foundation (ASF) under one * 3 * or more contributor license agreements. See the NOTICE file * 4 * distributed with this work for additional information * 5 * regarding copyright ownership. The ASF licenses this file * 6 * to you under the Apache License, Version 2.0 (the * 7 * "License"); you may not use this file except in compliance * 8 * with the License. You may obtain a copy of the License at * 9 * * 10 * http://www.apache.org/licenses/LICENSE-2.0 * 11 * * 12 * Unless required by applicable law or agreed to in writing, * 13 * software distributed under the License is distributed on an * 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * 15 * KIND, either express or implied. See the License for the * 16 * specific language governing permissions and limitations * 17 * under the License. * 18 ****************************************************************/ 19 20 package org.apache.james.mime4j.field; 21 22 23 24 /** 25 * Represents a <code>Content-Transfer-Encoding</code> field. 26 * 27 * 28 * @version $Id: ContentTransferEncodingField.java,v 1.2 2004/10/02 12:41:11 ntherning Exp $ 29 */ 30 public class ContentTransferEncodingField extends Field { 31 /** 32 * The <code>7bit</code> encoding. 33 */ 34 public static final String ENC_7BIT = "7bit"; 35 /** 36 * The <code>8bit</code> encoding. 37 */ 38 public static final String ENC_8BIT = "8bit"; 39 /** 40 * The <code>binary</code> encoding. 41 */ 42 public static final String ENC_BINARY = "binary"; 43 /** 44 * The <code>quoted-printable</code> encoding. 45 */ 46 public static final String ENC_QUOTED_PRINTABLE = "quoted-printable"; 47 /** 48 * The <code>base64</code> encoding. 49 */ 50 public static final String ENC_BASE64 = "base64"; 51 52 private String encoding; 53 54 protected ContentTransferEncodingField(String name, String body, String raw, String encoding) { 55 super(name, body, raw); 56 this.encoding = encoding; 57 } 58 59 /** 60 * Gets the encoding defined in this field. 61 * 62 * @return the encoding or an empty string if not set. 63 */ 64 public String getEncoding() { 65 return encoding; 66 } 67 68 /** 69 * Gets the encoding of the given field if. Returns the default 70 * <code>7bit</code> if not set or if 71 * <code>f</code> is <code>null</code>. 72 * 73 * @return the encoding. 74 */ 75 public static String getEncoding(ContentTransferEncodingField f) { 76 if (f != null && f.getEncoding().length() != 0) { 77 return f.getEncoding(); 78 } 79 return ENC_7BIT; 80 } 81 82 public static class Parser implements FieldParser { 83 public Field parse(final String name, final String body, final String raw) { 84 final String encoding = body.trim().toLowerCase(); 85 return new ContentTransferEncodingField(name, body, raw, encoding); 86 } 87 } 88 } 89
