/*
* The MIT License (MIT)
* Copyright (c) 2013 Mark Paluch
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package biz.paluch.maven.configurator;
import com.google.common.io.Files;
import biz.paluch.maven.configurator.model.CompressedContainer;
import biz.paluch.maven.configurator.model.Container;
import biz.paluch.maven.configurator.model.Entry;
import biz.paluch.maven.configurator.model.PackagingType;
import org.apache.maven.plugin.logging.Log;
import java.io.File;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
/**
* Create a Zip-File using a given Container model. Acts recursively in order to create zip-in-zip-in-zip.
*
* @author <a href="mailto:mpaluch@paluch.biz">Mark Paluch</a>
* @since 08.04.13 11:44
*/
public class ZipFileCompressor
{
private Container container;
private ZipOutputStream zos;
private File compressionBase;
/**
* @param container
* @param zos
* @param compressionBase base-path for compression.
*/
public ZipFileCompressor(Container container, ZipOutputStream zos, File compressionBase)
{
this.container = container;
this.zos = zos;
this.compressionBase = compressionBase;
}
/**
* Compress the files.
*
* @param log
* @throws IOException
*/
public void compress(Log log) throws IOException
{
Set<String> uniqueEntryNames = new HashSet<String>();
for (Entry entry : container.getEntries())
{
File source = new File(compressionBase, entry.getName());
if (!uniqueEntryNames.add(entry.getName().toLowerCase()))
{
log.warn("Container " + container.getName() + ", Entry " + entry.getName() +
" already exists, skipping");
continue;
}
ZipEntry ze = getZipEntry(entry.getName(), source);
if (entry instanceof CompressedContainer && source.isDirectory())
{
compress(log, (CompressedContainer) entry, source, ze);
continue;
}
if (source.isDirectory())
{
continue;
}
zos.putNextEntry(ze);
Files.copy(source, zos);
zos.closeEntry();
}
zos.close();
}
/**
* Create a nested Zip-Entry (zip-in-zip).
*
* @param log
* @param entry
* @param source
* @param ze
* @throws IOException
*/
private void compress(Log log, CompressedContainer entry, File source, ZipEntry ze) throws IOException
{
CompressedContainer cc = (CompressedContainer) entry;
zos.putNextEntry(ze);
ZipOutputStream subZipStream = new ZipOutputStream(new FilterOutputStream(zos)
{
@Override
public void close() throws IOException
{
}
});
ZipFileCompressor compressor = new ZipFileCompressor(cc, subZipStream, source);
compressor.compress(log);
zos.closeEntry();
}
private ZipEntry getZipEntry(String name, File source)
{
ZipEntry ze = new ZipEntry(name);
ze.setTime(source.lastModified());
ze.setSize(source.length());
return ze;
}
private boolean isPackagedFile(ZipEntry entry)
{
if (getPackagingType(entry) != null)
{
return true;
}
return false;
}
private PackagingType getPackagingType(ZipEntry entry)
{
String name = entry.getName().toLowerCase();
for (PackagingType packagingType : PackagingType.values())
{
if (name.endsWith("." + packagingType.getType()))
{
return packagingType;
}
}
return null;
}
}