2011-03-10 07:10:59 +00:00
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// $Id$
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/*
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* WorldEdit
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* Copyright (C) 2010 sk89q <http://www.sk89q.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.sk89q.worldedit.data;
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import java.io.*;
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import java.util.regex.Pattern;
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import java.util.zip.ZipException;
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import java.util.Enumeration;
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import de.schlichtherle.util.zip.*;
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/**
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* Represents the chunk store used by Minecraft alpha but zipped. Uses
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* the replacement classes for java.util.zip.* from TrueZip.
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*
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* @author sk89q
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*/
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public class TrueZipLegacyChunkStore extends LegacyChunkStore {
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/**
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* ZIP file.
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*/
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@SuppressWarnings("unused")
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private File zipFile;
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/**
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* Actual ZIP.
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*/
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private ZipFile zip;
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/**
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* Folder inside the ZIP file to read from, if any.
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*/
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private String folder;
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/**
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* Create an instance. The folder argument lets you choose a folder or
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* path to look into in the ZIP for the files. Use a blank string for
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* the folder to not look into a subdirectory.
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*
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* @param zipFile
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* @param folder
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* @throws IOException
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2011-09-24 19:32:03 +00:00
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* @throws ZipException
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2011-03-10 07:10:59 +00:00
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*/
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public TrueZipLegacyChunkStore(File zipFile, String folder)
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throws IOException, ZipException {
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this.zipFile = zipFile;
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this.folder = folder;
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2011-09-24 19:32:03 +00:00
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2011-03-10 07:10:59 +00:00
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zip = new ZipFile(zipFile);
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}
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/**
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* Create an instance. The subfolder containing the chunk data will
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* be detected.
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*
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* @param zipFile
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* @throws IOException
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* @throws ZipException
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*/
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public TrueZipLegacyChunkStore(File zipFile)
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throws IOException, ZipException {
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this.zipFile = zipFile;
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zip = new ZipFile(zipFile);
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}
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/**
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* Get the input stream for a chunk file.
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*
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* @param f1
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* @param f2
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* @param name
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* @return
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* @throws IOException
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* @throws DataException
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*/
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@Override
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@SuppressWarnings("unchecked")
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protected InputStream getInputStream(String f1, String f2, String name)
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throws IOException, DataException {
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String file = f1 + "/" + f2 + "/" + name;
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// Detect subfolder for the world's files
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if (folder != null) {
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if (!folder.equals("")) {
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file = folder + "/" + file;
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}
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} else {
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ZipEntry testEntry = zip.getEntry("level.dat");
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// So, the data is not in the root directory
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if (testEntry == null) {
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// Let's try a world/ sub-directory
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testEntry = getEntry("world/level.dat");
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2011-09-24 19:32:03 +00:00
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2011-03-10 07:10:59 +00:00
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Pattern pattern = Pattern.compile(".*[\\\\/]level\\.dat$");
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// So not there either...
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if (testEntry == null) {
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for (Enumeration<? extends ZipEntry> e = zip.entries();
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e.hasMoreElements(); ) {
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2011-09-24 19:32:03 +00:00
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2011-03-10 07:10:59 +00:00
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testEntry = (ZipEntry)e.nextElement();
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// Whoo, found level.dat!
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if (pattern.matcher(testEntry.getName()).matches()) {
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2011-03-10 08:26:01 +00:00
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folder = testEntry.getName().replaceAll("level\\.dat$", "");
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folder = folder.substring(0, folder.length() - 1);
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file = folder + file;
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2011-03-10 07:10:59 +00:00
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break;
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}
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}
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} else {
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file = "world/" + file;
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}
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}
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}
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ZipEntry entry = getEntry(file);
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if (entry == null) {
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throw new MissingChunkException();
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}
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try {
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return zip.getInputStream(entry);
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} catch (ZipException e) {
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throw new IOException("Failed to read " + file + " in ZIP");
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}
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}
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2011-09-24 19:32:03 +00:00
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2011-03-10 07:10:59 +00:00
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/**
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* Get an entry from the ZIP, trying both types of slashes.
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2011-09-24 19:32:03 +00:00
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*
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2011-03-10 07:10:59 +00:00
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* @param file
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* @return
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*/
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private ZipEntry getEntry(String file) {
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ZipEntry entry = zip.getEntry(file);
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if (entry != null) {
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return entry;
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}
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return zip.getEntry(file.replace("/", "\\"));
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}
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/**
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* Close resources.
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*
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* @throws IOException
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*/
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@Override
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public void close() throws IOException {
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zip.close();
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}
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2011-03-10 07:51:40 +00:00
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@Override
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public boolean isValid() {
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return true; // Yeah, oh well
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}
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2011-03-10 07:10:59 +00:00
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}
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