001    package biweekly.util;
002    
003    import java.io.ByteArrayOutputStream;
004    import java.io.Closeable;
005    import java.io.IOException;
006    import java.io.InputStream;
007    
008    /*
009     Copyright (c) 2013, Michael Angstadt
010     All rights reserved.
011    
012     Redistribution and use in source and binary forms, with or without
013     modification, are permitted provided that the following conditions are met: 
014    
015     1. Redistributions of source code must retain the above copyright notice, this
016     list of conditions and the following disclaimer. 
017     2. Redistributions in binary form must reproduce the above copyright notice,
018     this list of conditions and the following disclaimer in the documentation
019     and/or other materials provided with the distribution. 
020    
021     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
022     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
023     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
024     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
025     ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
026     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
027     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
028     ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
029     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
030     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
031     */
032    
033    /**
034     * I/O helper classes.
035     * @author Michael Angstadt
036     */
037    public class IOUtils {
038            /**
039             * Reads all the bytes from an input stream.
040             * @param in the input stream
041             * @return the bytes
042             * @throws IOException if there's a problem reading from the input stream
043             */
044            public static byte[] toByteArray(InputStream in) throws IOException {
045                    return toByteArray(in, false);
046            }
047    
048            /**
049             * Reads all the bytes from an input stream.
050             * @param in the input stream
051             * @param close true to close the input stream when done, false not to
052             * @return the bytes
053             * @throws IOException if there's a problem reading from the input stream
054             */
055            public static byte[] toByteArray(InputStream in, boolean close) throws IOException {
056                    try {
057                            ByteArrayOutputStream out = new ByteArrayOutputStream();
058                            byte[] buffer = new byte[4096];
059                            int read;
060                            while ((read = in.read(buffer)) != -1) {
061                                    out.write(buffer, 0, read);
062                            }
063                            return out.toByteArray();
064                    } finally {
065                            in.close();
066                    }
067            }
068    
069            /**
070             * Closes a closeable resource, catching its {@link IOException}.
071             * @param closeable the resource to close (can be null)
072             */
073            public static void closeQuietly(Closeable closeable) {
074                    try {
075                            if (closeable != null) {
076                                    closeable.close();
077                            }
078                    } catch (IOException e) {
079                            //ignore
080                    }
081            }
082    
083            private IOUtils() {
084                    //hide
085            }
086    }