001// Copyright 2006 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry5.internal.util;
016
017import org.apache.commons.codec.binary.Base64;
018
019import java.io.ByteArrayInputStream;
020
021/**
022 * An extension of {@link ByteArrayInputStream} that is initialized from a Base64 input stream (rather than from a byte
023 * array).
024 */
025public class Base64InputStream extends ByteArrayInputStream
026{
027    public Base64InputStream(String base64)
028    {
029        super(decode(base64));
030    }
031
032    private static byte[] decode(String base64)
033    {
034        byte[] array = base64.getBytes();
035
036        return Base64.decodeBase64(array);
037    }
038}