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 java.io.UnsupportedEncodingException; 020 021import org.jivesoftware.smack.util.StringUtils; 022 023/** 024 * A Base 64 encoding implementation. 025 * @author Florian Schmaus 026 */ 027public class Java7Base64Encoder implements org.jivesoftware.smack.util.stringencoder.Base64.Encoder { 028 029 private static Java7Base64Encoder instance = new Java7Base64Encoder(); 030 031 private static int BASE64_ENCODER_FLAGS = Base64.DONT_BREAK_LINES; 032 033 private Java7Base64Encoder() { 034 // Use getInstance() 035 } 036 037 public static Java7Base64Encoder getInstance() { 038 return instance; 039 } 040 041 @Override 042 public byte[] decode(String string) { 043 return Base64.decode(string); 044 } 045 046 @Override 047 public byte[] decode(byte[] input, int offset, int len) { 048 return Base64.decode(input, offset, len, 0); 049 } 050 051 @Override 052 public String encodeToString(byte[] input, int offset, int len) { 053 return Base64.encodeBytes(input, offset, len, BASE64_ENCODER_FLAGS); 054 } 055 056 @Override 057 public byte[] encode(byte[] input, int offset, int len) { 058 String string = encodeToString(input, offset, len); 059 try { 060 return string.getBytes(StringUtils.USASCII); 061 } catch (UnsupportedEncodingException e) { 062 throw new AssertionError(e); 063 } 064 } 065 066}