Java ByteArrayOutputStream Write load(InputStream is, boolean close)

Description

Copy the contents of is to the returned byte array.

License

Open Source License

Parameter

Parameter	Description
is	a parameter
close	If true, is is closed after the copy.

Exception

Parameter	Description
IOException	an exception

Declaration

public static final byte[] load(InputStream is, boolean close) throws IOException 

Method Source Code

//package com.java2s;
/*//from  w  w  w.j  av  a2s  .co m
 * $Id$
 *
 * Copyright (C) 2003-2015 JNode.org
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but 
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; If not, write to the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

import java.io.ByteArrayOutputStream;
import java.io.Closeable;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class Main {
    /**
     * Copy the contents of is to the returned byte array.
     *
     * @param is
     * @param close If true, is is closed after the copy.
     * @throws IOException
     */
    public static final byte[] load(InputStream is, boolean close) throws IOException {
        final ByteArrayOutputStream os = new ByteArrayOutputStream();
        copy(is, os, null, close);
        return os.toByteArray();
    }

    /**
     * Copy dest.length bytes from the inputstream into the dest bytearray.
     *
     * @param is
     * @param dest
     * @throws IOException
     */
    public static void copy(InputStream is, byte[] dest) throws IOException {
        int len = dest.length;
        int ofs = 0;
        while (len > 0) {
            int size = is.read(dest, ofs, len);
            ofs += size;
            len -= size;
        }
    }

    /**
     * Copy the contents of is to os.
     *
     * @param is
     * @param os
     * @param buf   Can be null
     * @param close If true, is is closed after the copy.
     * @throws IOException
     */
    public static final void copy(InputStream is, OutputStream os, byte[] buf, boolean close) throws IOException {
        try {
            int len;
            if (buf == null) {
                buf = new byte[4096];
            }
            while ((len = is.read(buf)) > 0) {
                os.write(buf, 0, len);
            }
            os.flush();
        } finally {
            // in any case, we must close the stream if requested
            if (close) {
                is.close();
            }
        }
    }

    /**
     * close quietly a stream (no IOException thrown), which might be null
     *
     * @param closeable the stream to close, might be null
     * @return true if the stream was null or was closed properly
     */
    public static final boolean close(Closeable closeable) {
        boolean ok = false;

        try {
            if (closeable != null) {
                closeable.close();
            }

            ok = true;
        } catch (IOException e) {
            e.printStackTrace();
        }

        return ok;
    }
}

Related

1. load(final File file, final String encoding)
2. load(final String resource, final byte[] defaultResult)
3. load(InputStream in, byte[] buffer, int offset, int initialBufferSize)
4. load(InputStream inputStream, Class type)
5. load(InputStream is)
6. load(String fileName)
7. loadAFileToString(File f)
8. loadAsciiTxt()
9. loadAsText(Class cls, String name)