org.xnio.streams.Streams Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* 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());
}
}
}