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/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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*
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* Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved.
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*
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* The contents of this file are subject to the terms of the GNU General Public License Version 3
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* only ("GPL"). You may not use this file except in compliance with the License. You can obtain a
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* copy of the License at http://www.gnu.org/licenses/gpl-3.0.html See the License for the specific
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* language governing permissions and limitations under the License.
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*
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* When distributing the software, include this License Header Notice in each file.
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*/
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package org.openconcerto.utils;
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import java.io.BufferedOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.nio.charset.Charset;
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public class StreamUtils {
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public static final OutputStream NULL_OS = new OutputStream() {
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@Override
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public void write(int b) throws IOException {
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// ignore
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}
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public void write(byte b[], int off, int len) throws IOException {
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if (b == null)
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throw new NullPointerException();
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// ignore
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}
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};
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private static final Charset UTF8 = Charset.forName("UTF-8");
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/**
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* Verbatim copy an entry from input to output stream.
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*
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* @param in the source.
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* @param out the destination.
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* @throws IOException if an error occurs while reading or writing.
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*/
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public static void copy(InputStream in, OutputStream out) throws IOException {
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copy(in, out, 512 * 1024);
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}
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public static void copy(InputStream in, OutputStream out, final int bufferSize) throws IOException {
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final byte[] buffer = new byte[bufferSize];
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while (true) {
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int count = in.read(buffer);
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if (count == -1)
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break;
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out.write(buffer, 0, count);
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}
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}
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public static void copy(InputStream ins, File out) throws IOException {
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// buffered since read() in copy(InputStream, OutputStream) may return 1 byte at a time
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final OutputStream ous = new BufferedOutputStream(new FileOutputStream(out));
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try {
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copy(ins, ous);
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} finally {
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ous.close();
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}
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}
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public static void writeln(final String s, final OutputStream out) throws IOException {
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write(s + "\n", out);
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}
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public static void write(final String s, final OutputStream out) throws IOException {
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write(s, out, UTF8);
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}
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public static void write(final String s, final OutputStream out, Charset charset) throws IOException {
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out.write(s.getBytes(charset));
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}
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}
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