/*
* RHQ Management Platform
* Copyright (C) 2005-2010 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.helpers.perftest.support.input;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.dbunit.dataset.stream.IDataSetProducer;
/**
* Represents a zipped CSV input.
*
* @author Lukas Krejci
*/
public class ZippedCsvInput extends CsvInput {
private ZipInputStreamProviderDecorator sourceFile;
/**
*
* @param zipFileProvider a provider that creates a stream to read the zip file.
* @throws IOException
*/
public ZippedCsvInput(ZipInputStreamProviderDecorator zipFileProvider) throws IOException {
super(createTempDirectory());
sourceFile = zipFileProvider;
}
@Override
public void close() throws IOException {
super.close();
delete(getDirectory());
}
@Override
public IDataSetProducer getProducer() throws Exception {
if (getCsvProducer() == null) {
unzip(sourceFile.createInputStream(), getDirectory());
}
return super.getProducer();
}
private static File createTempDirectory() throws IOException {
File tmpFile = File.createTempFile("perftest-support-csv-output", null);
tmpFile.delete();
tmpFile.mkdir();
return tmpFile;
}
private static void unzip(ZipInputStream zipFile, File target) throws RuntimeException, IOException {
ZipEntry entry = null;
while((entry = zipFile.getNextEntry()) != null) {
File f = new File(target, entry.getName());
if (entry.isDirectory()) {
f.mkdirs();
} else {
String parentDirectory = f.getParent();
File parentDirectoryFile = new File(parentDirectory);
parentDirectoryFile.mkdirs();
BufferedOutputStream outputStream = new BufferedOutputStream(new FileOutputStream(f));
try {
copy(zipFile, outputStream);
} finally {
outputStream.close();
}
}
}
}
private static void delete(File f) {
if (f.isDirectory()) {
for (File child : f.listFiles()) {
delete(child);
}
f.delete();
} else {
f.delete();
}
}
private static void copy(InputStream input, OutputStream output) throws IOException {
long numBytesCopied = 0;
int bufferSize = 32768;
input = new BufferedInputStream(input, bufferSize);
byte[] buffer = new byte[bufferSize];
for (int bytesRead = input.read(buffer); bytesRead != -1; bytesRead = input.read(buffer)) {
output.write(buffer, 0, bytesRead);
numBytesCopied += bytesRead;
}
output.flush();
}
}