com.groupbyinc.common.apache.commons.codec.binary.Base64OutputStream Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.codec.binary;
import java.io.OutputStream;
/**
* Provides Base64 encoding and decoding in a streaming fashion (unlimited size). When encoding the default lineLength
* is 76 characters and the default lineEnding is CRLF, but these can be overridden by using the appropriate
* constructor.
*
* The default behaviour of the Base64OutputStream is to ENCODE, whereas the default behaviour of the Base64InputStream
* is to DECODE. But this behaviour can be overridden by using a different constructor.
*
*
* This class implements section 6.8. Base64 Content-Transfer-Encoding from RFC 2045 Multipurpose
* Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies by Freed and Borenstein.
*
*
* Since this class operates directly on byte streams, and not character streams, it is hard-coded to only encode/decode
* character encodings which are compatible with the lower 127 ASCII chart (ISO-8859-1, Windows-1252, UTF-8, etc).
*
*
* Note: It is mandatory to close the stream after the last byte has been written to it, otherwise the
* final padding will be omitted and the resulting data will be incomplete/inconsistent.
*
*
* @version $Id: Base64OutputStream.java 1635952 2014-11-01 14:19:04Z tn $
* @see RFC 2045
* @since 1.4
*/
public class Base64OutputStream extends BaseNCodecOutputStream {
/**
* Creates a Base64OutputStream such that all data written is Base64-encoded to the original provided OutputStream.
*
* @param out
* OutputStream to wrap.
*/
public Base64OutputStream(final OutputStream out) {
this(out, true);
}
/**
* Creates a Base64OutputStream such that all data written is either Base64-encoded or Base64-decoded to the
* original provided OutputStream.
*
* @param out
* OutputStream to wrap.
* @param doEncode
* true if we should encode all data written to us, false if we should decode.
*/
public Base64OutputStream(final OutputStream out, final boolean doEncode) {
super(out,new Base64(false), doEncode);
}
/**
* Creates a Base64OutputStream such that all data written is either Base64-encoded or Base64-decoded to the
* original provided OutputStream.
*
* @param out
* OutputStream to wrap.
* @param doEncode
* true if we should encode all data written to us, false if we should decode.
* @param lineLength
* If doEncode is true, each line of encoded data will contain lineLength characters (rounded down to
* nearest multiple of 4). If lineLength <= 0, the encoded data is not divided into lines. If doEncode
* is false, lineLength is ignored.
* @param lineSeparator
* If doEncode is true, each line of encoded data will be terminated with this byte sequence (e.g. \r\n).
* If lineLength <= 0, the lineSeparator is not used. If doEncode is false lineSeparator is ignored.
*/
public Base64OutputStream(final OutputStream out, final boolean doEncode,
final int lineLength, final byte[] lineSeparator) {
super(out, new Base64(lineLength, lineSeparator), doEncode);
}
}