org.xnio.streams.Streams Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source
*
* Copyright 2011 Red Hat, Inc. and/or its affiliates, and individual
* contributors as indicated by the @author tags.
*
* Licensed 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.xnio.streams;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.nio.charset.UnsupportedCharsetException;
import org.xnio.IoUtils;
/**
* Stream utility class.
*
* @author David M. Lloyd
*/
public final class Streams {
private Streams() {
}
/**
* Copy from one stream to another.
*
* @param input the source stream
* @param output the destination stream
* @param close {@code true} if the input and output streams should be closed
* @param bufferSize the buffer size
* @throws IOException if an I/O error occurs
*/
public static void copyStream(InputStream input, OutputStream output, boolean close, int bufferSize) throws IOException {
final byte[] buffer = new byte[bufferSize];
int res;
try {
for (;;) {
res = input.read(buffer);
if (res == -1) {
if (close) {
input.close();
output.close();
}
return;
}
output.write(buffer, 0, res);
}
} finally {
if (close) {
IoUtils.safeClose(input);
IoUtils.safeClose(output);
}
}
}
/**
* Copy from one stream to another. A default buffer size is assumed.
*
* @param input the source stream
* @param output the destination stream
* @param close {@code true} if the input and output streams should be closed
* @throws IOException if an I/O error occurs
*/
public static void copyStream(InputStream input, OutputStream output, boolean close) throws IOException {
copyStream(input, output, close, 8192);
}
/**
* Copy from one stream to another. A default buffer size is assumed, and both streams are closed on completion.
*
* @param input the source stream
* @param output the destination stream
* @throws IOException if an I/O error occurs
*/
public static void copyStream(InputStream input, OutputStream output) throws IOException {
copyStream(input, output, true, 8192);
}
static Charset getCharset(final String charsetName) throws UnsupportedEncodingException {
try {
return Charset.forName(charsetName);
} catch (UnsupportedCharsetException e) {
throw new UnsupportedEncodingException(e.getMessage());
}
}
}