001/** 002 * 003 * Copyright © 2014 Florian Schmaus 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.android; 018 019import java.io.UnsupportedEncodingException; 020 021import org.jivesoftware.smack.util.StringUtils; 022import org.jivesoftware.smack.util.stringencoder.StringEncoder; 023 024import android.util.Base64; 025 026public final class AndroidBase64UrlSafeEncoder implements StringEncoder { 027 028 private static AndroidBase64UrlSafeEncoder instance = new AndroidBase64UrlSafeEncoder(); 029 030 private static final int BASE64_ENCODER_FLAGS = Base64.URL_SAFE | Base64.NO_WRAP; 031 032 private AndroidBase64UrlSafeEncoder() { 033 // Use getInstance() 034 } 035 036 public static AndroidBase64UrlSafeEncoder getInstance() { 037 return instance; 038 } 039 040 @Override 041 public String encode(String string) { 042 try { 043 return Base64.encodeToString(string.getBytes(StringUtils.UTF8), BASE64_ENCODER_FLAGS); 044 } catch (UnsupportedEncodingException e) { 045 throw new IllegalStateException("UTF-8 not supported", e); 046 } 047 } 048 049 @Override 050 public String decode(String string) { 051 byte[] bytes = Base64.decode(string, BASE64_ENCODER_FLAGS); 052 try { 053 return new String(bytes, StringUtils.UTF8); 054 } catch (UnsupportedEncodingException e) { 055 throw new IllegalStateException("UTF-8 not supported", e); 056 } 057 } 058 059}