/**
* Copyright (c) 2011-2012 Optimax Software Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Optimax Software, ElasticInbox, nor the names
* of its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.elasticinbox.common.utils;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import com.google.common.io.ByteStreams;
import com.google.common.io.CountingInputStream;
import com.google.common.io.NullOutputStream;
import com.ning.compress.lzf.LZFDecoder;
import com.ning.compress.lzf.LZFEncoder;
import com.ning.compress.lzf.LZFInputStream;
import com.ning.compress.lzf.LZFOutputStream;
public class IOUtils
{
// ensure non-instantiability
private IOUtils() {
}
public static byte[] compress(byte[] in) throws IOException {
return LZFEncoder.encode(in);
}
public static byte[] compress(String in) throws IOException {
return LZFEncoder.encode(in.getBytes("UTF-8"));
}
public static void compress(InputStream in, OutputStream out)
throws IOException
{
LZFOutputStream compressor = null;
boolean success = true;
try {
compressor = new LZFOutputStream(out);
byte[] buf = ThreadLocalByteBuffer.getBuffer();
int len;
while ((len = in.read(buf)) != -1) {
compressor.write(buf, 0, len);
}
compressor.close();
} catch (IOException e) {
success = false;
throw new IllegalStateException(e.getMessage(), e);
} finally {
if (!success && (compressor != null)) {
compressor.close();
}
}
}
public static byte[] decompress(byte[] in) throws IOException {
return LZFDecoder.decode(in);
}
public static void decompress(InputStream in, OutputStream out)
throws IOException
{
LZFInputStream decompressor = null;
try {
decompressor = new LZFInputStream(in);
byte[] buf = ThreadLocalByteBuffer.getBuffer();
int len;
while ((len = decompressor.read(buf)) != -1) {
out.write(buf, 0, len);
}
} finally {
if (decompressor != null) {
decompressor.close();
}
}
}
public static boolean isCompressed(byte[] data) {
return data[0] == 'Z' && data[1] == 'V';
}
/**
* Calculate InputStream size by reading through it
*
* @param in
* @return Size of the data
* @throws IOException
*/
public static long getInputStreamSize(InputStream in) throws IOException
{
CountingInputStream cin = new CountingInputStream(in);
ByteStreams.copy(cin, new NullOutputStream());
return cin.getCount();
}
}