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/*
* Copyright 2016 FabricMC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.fabricmc.loom.util;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.file.FileSystem;
import java.nio.file.FileSystemAlreadyExistsException;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;
public final class FileSystemUtil {
public static class FileSystemDelegate implements AutoCloseable {
private final FileSystem fileSystem;
private final boolean owner;
public FileSystemDelegate(FileSystem fileSystem, boolean owner) {
this.fileSystem = fileSystem;
this.owner = owner;
}
public FileSystem get() {
return fileSystem;
}
@Override
public void close() throws IOException {
if (owner) {
fileSystem.close();
}
}
}
private FileSystemUtil() {
}
private static final Map<String, String> jfsArgsCreate = new HashMap<>();
private static final Map<String, String> jfsArgsEmpty = new HashMap<>();
static {
jfsArgsCreate.put("create", "true");
}
public static FileSystemDelegate getJarFileSystem(File file, boolean create) throws IOException {
return getJarFileSystem(file.toURI(), create);
}
public static FileSystemDelegate getJarFileSystem(Path path, boolean create) throws IOException {
return getJarFileSystem(path.toUri(), create);
}
public static FileSystemDelegate getJarFileSystem(URI uri, boolean create) throws IOException {
URI jarUri;
try {
jarUri = new URI("jar:" + uri.getScheme(), uri.getHost(), uri.getPath(), uri.getFragment());
} catch (URISyntaxException e) {
throw new IOException(e);
}
try {
return new FileSystemDelegate(FileSystems.newFileSystem(jarUri, create ? jfsArgsCreate : jfsArgsEmpty), true);
} catch (FileSystemAlreadyExistsException e) {
return new FileSystemDelegate(FileSystems.getFileSystem(jarUri), false);
} catch (IOException e) {
throw new IOException("Could not create JAR file system for " + uri + " (create: " + create + ")", e);
}
}
}
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