ca.uhn.hl7v2.hoh.util.GZipUtils Maven / Gradle / Ivy
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package ca.uhn.hl7v2.hoh.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
/**
* Methods for dealing with GZip encoding
*/
public class GZipUtils {
/**
* Non instantiable
*/
private GZipUtils() {
// nothing
}
/**
* Compresses a byte array
*/
public static byte[] compress(byte[] theBytes) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
GZIPOutputStream gos = new GZIPOutputStream(bos);
gos.write(theBytes);
gos.close();
return bos.toByteArray();
}
/**
* Compresses a byte array
*/
public static byte[] uncompress(byte[] theBytes) throws IOException {
ByteArrayInputStream bis = new ByteArrayInputStream(theBytes);
GZIPInputStream gos = new GZIPInputStream(bis);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
IOUtils.copy(gos, bos);
return bos.toByteArray();
}
}