001/**
002 *
003 * Copyright © 2014-2019 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.nio.charset.StandardCharsets;
020
021import org.jivesoftware.smack.util.stringencoder.StringEncoder;
022
023import android.util.Base64;
024
025public final class AndroidBase64UrlSafeEncoder implements StringEncoder<String> {
026
027    private static AndroidBase64UrlSafeEncoder instance = new AndroidBase64UrlSafeEncoder();
028
029    private static final int BASE64_ENCODER_FLAGS = Base64.URL_SAFE | Base64.NO_WRAP;
030
031    private AndroidBase64UrlSafeEncoder() {
032        // Use getInstance()
033    }
034
035    public static AndroidBase64UrlSafeEncoder getInstance() {
036        return instance;
037    }
038
039    @Override
040    public String encode(String string) {
041        return Base64.encodeToString(string.getBytes(StandardCharsets.UTF_8), BASE64_ENCODER_FLAGS);
042    }
043
044    @Override
045    public String decode(String string) {
046        byte[] bytes = Base64.decode(string, BASE64_ENCODER_FLAGS);
047        return new String(bytes, StandardCharsets.UTF_8);
048    }
049
050}