/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.world.storage;
import com.sk89q.worldedit.world.DataException;
import de.schlichtherle.util.zip.ZipEntry;
import de.schlichtherle.util.zip.ZipFile;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.regex.Pattern;
import java.util.zip.ZipException;
/**
* Represents the chunk store used by Minecraft alpha but zipped. Uses
* the replacement classes for java.util.zip.* from TrueZip.
*/
public class TrueZipLegacyChunkStore extends LegacyChunkStore {
private File zipFile;
private ZipFile zip;
private String folder;
/**
* Create an instance. The folder argument lets you choose a folder or
* path to look into in the ZIP for the files. Use a blank string for
* the folder to not look into a subdirectory.
*
* @param zipFile the ZIP file to open
* @param folder the folder to look into in the ZIP
* @throws IOException
* @throws ZipException
*/
public TrueZipLegacyChunkStore(File zipFile, String folder) throws IOException, ZipException {
this.zipFile = zipFile;
this.folder = folder;
zip = new ZipFile(zipFile);
}
/**
* Create an instance. The subf-older containing the chunk data will
* be detected.
*
* @param zipFile the ZIP file to open
* @throws IOException
* @throws ZipException
*/
public TrueZipLegacyChunkStore(File zipFile) throws IOException, ZipException {
this.zipFile = zipFile;
zip = new ZipFile(zipFile);
}
/**
* Get the input stream for a chunk file.
*
* @param f1 the first part of the filename
* @param f2 the second part of the filename
* @param name the name of the file
* @return an input stream
* @throws IOException
* @throws DataException
*/
@Override
@SuppressWarnings("unchecked")
protected InputStream getInputStream(String f1, String f2, String name) throws IOException, DataException {
String file = f1 + "/" + f2 + "/" + name;
// Detect subfolder for the world's files
if (folder != null) {
if (!folder.equals("")) {
file = folder + "/" + file;
}
} else {
ZipEntry testEntry = zip.getEntry("level.dat");
// So, the data is not in the root directory
if (testEntry == null) {
// Let's try a world/ sub-directory
testEntry = getEntry("world/level.dat");
Pattern pattern = Pattern.compile(".*[\\\\/]level\\.dat$");
// So not there either...
if (testEntry == null) {
for (Enumeration<? extends ZipEntry> e = zip.entries(); e.hasMoreElements(); ) {
testEntry = e.nextElement();
// Whoo, found level.dat!
if (pattern.matcher(testEntry.getName()).matches()) {
folder = testEntry.getName().replaceAll("level\\.dat$", "");
folder = folder.substring(0, folder.length() - 1);
file = folder + file;
break;
}
}
} else {
file = "world/" + file;
}
}
}
ZipEntry entry = getEntry(file);
if (entry == null) {
throw new MissingChunkException();
}
try {
return zip.getInputStream(entry);
} catch (ZipException e) {
throw new IOException("Failed to read " + file + " in ZIP");
}
}
/**
* Get an entry from the ZIP, trying both types of slashes.
*
* @param file the file
* @return an entry
*/
private ZipEntry getEntry(String file) {
ZipEntry entry = zip.getEntry(file);
if (entry != null) {
return entry;
}
return zip.getEntry(file.replace("/", "\\"));
}
@Override
public void close() throws IOException {
zip.close();
}
@Override
public boolean isValid() {
return true; // Yeah, oh well
}
}