org.apache.axiom.util.base64.Base64EncodingOutputStream 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.axiom.util.base64;
import java.io.IOException;
import java.io.OutputStream;
/**
* {@link OutputStream} implementation that writes base64 encoded data to another
* {@link OutputStream} using ASCII encoding. This class internally buffers the data before writing
* it to the underlying stream.
*/
public class Base64EncodingOutputStream extends AbstractBase64EncodingOutputStream {
private final OutputStream parent;
private final byte[] buffer;
private int len;
/**
* Constructor.
*
* @param parent the stream to write the encoded data to
* @param bufferSize the buffer size to use
*/
public Base64EncodingOutputStream(OutputStream parent, int bufferSize) {
this.parent = parent;
buffer = new byte[bufferSize];
}
/**
* Constructor that sets the buffer size to its default value of 4096 characters.
*
* @param parent the stream to write the encoded data to
*/
public Base64EncodingOutputStream(OutputStream parent) {
this(parent, 4096);
}
@Override
protected void doWrite(byte[] b) throws IOException {
if (buffer.length - len < 4) {
flushBuffer();
}
System.arraycopy(b, 0, buffer, len, 4);
len += 4;
}
@Override
protected void flushBuffer() throws IOException {
parent.write(buffer, 0, len);
len = 0;
}
@Override
protected void doFlush() throws IOException {
parent.flush();
}
@Override
protected void doClose() throws IOException {
parent.close();
}
}