001/** 002 * 003 * Copyright the original author or authors 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.jivesoftware.smack.util.stringencoder.java7; 018 019import org.jivesoftware.smack.util.stringencoder.StringEncoder; 020 021 022/** 023 * A Base 64 encoding implementation that generates filename and Url safe encodings. 024 * 025 * <p> 026 * Note: This does NOT produce standard Base 64 encodings, but a variant as defined in 027 * Section 4 of RFC3548: 028 * <a href="http://www.faqs.org/rfcs/rfc3548.html">http://www.faqs.org/rfcs/rfc3548.html</a>. 029 * </p> 030 * 031 * @author Robin Collier 032 */ 033public class Java7Base64UrlSafeEncoder implements StringEncoder { 034 035 private static Java7Base64UrlSafeEncoder instance = new Java7Base64UrlSafeEncoder(); 036 037 private static int BASE64_ENCODER_FLAGS = Base64.URL_SAFE | Base64.DONT_BREAK_LINES; 038 039 private Java7Base64UrlSafeEncoder() { 040 // Use getInstance() 041 } 042 043 public static Java7Base64UrlSafeEncoder getInstance() { 044 return instance; 045 } 046 047 public String encode(String s) { 048 return Base64.encodeBytes(s.getBytes(), BASE64_ENCODER_FLAGS); 049 } 050 051 public String decode(String s) { 052 return new String(Base64.decode(s, BASE64_ENCODER_FLAGS)); 053 } 054 055}