/
TrueZipMcRegionChunkStore.java
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/
TrueZipMcRegionChunkStore.java
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// $Id$
/*
* WorldEdit
* Copyright (C) 2010 sk89q <http://www.sk89q.com>
*
* 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, 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.data;
import java.io.*;
import java.util.regex.Pattern;
import java.util.zip.ZipException;
import java.util.Enumeration;
import de.schlichtherle.util.zip.*;
/**
* Represents the chunk store used by Minecraft but zipped. Uses
* the replacement classes for java.util.zip.* from TrueZip.
*
* @author sk89q
*/
public class TrueZipMcRegionChunkStore extends McRegionChunkStore {
/**
* ZIP file.
*/
protected File zipFile;
/**
* Actual ZIP.
*/
protected ZipFile zip;
/**
* Folder inside the ZIP file to read from, if any.
*/
protected 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
* @param folder
* @throws IOException
* @throws ZipException
*/
public TrueZipMcRegionChunkStore(File zipFile, String folder)
throws IOException, ZipException {
this.zipFile = zipFile;
this.folder = folder;
zip = new ZipFile(zipFile);
}
/**
* Create an instance. The subfolder containing the chunk data will
* be detected.
*
* @param zipFile
* @throws IOException
* @throws ZipException
*/
public TrueZipMcRegionChunkStore(File zipFile)
throws IOException, ZipException {
this.zipFile = zipFile;
zip = new ZipFile(zipFile);
}
/**
* Get the input stream for a chunk file.
*
* @param name
* @return
* @throws IOException
* @throws DataException
*/
@Override
@SuppressWarnings("unchecked")
protected InputStream getInputStream(String name)
throws IOException, DataException {
String file = "region/" + 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$");
// So not there either...
if (testEntry == null) {
for (Enumeration<? extends ZipEntry> e = zip.entries();
e.hasMoreElements(); ) {
testEntry = e.nextElement();
// Whoo, found level.dat!
if (pattern.matcher(testEntry.getName()).matches()) {
file = testEntry.getName().replaceAll("level\\.dat$", "")
+ 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
* @return
*/
private ZipEntry getEntry(String file) {
ZipEntry entry = zip.getEntry(file);
if (entry != null) {
return entry;
}
return zip.getEntry(file.replace("/", "\\"));
}
/**
* Close resources.
*
* @throws IOException
*/
@Override
public void close() throws IOException {
zip.close();
}
@Override
@SuppressWarnings("unchecked")
public boolean isValid() {
for (Enumeration<? extends ZipEntry> e = zip.entries();
e.hasMoreElements(); ) {
ZipEntry testEntry = e.nextElement();
if (testEntry.getName().matches(".*\\.mcr$")) {
return true;
}
}
return false;
}
}