| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.drill.exec.store; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.net.URL; |
| |
| import org.apache.hadoop.fs.FSDataInputStream; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.permission.FsPermission; |
| import org.apache.hadoop.util.Progressable; |
| |
| import org.apache.drill.shaded.guava.com.google.common.io.Resources; |
| |
| |
| public class ClassPathFileSystem extends FileSystem{ |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(ClassPathFileSystem.class); |
| |
| static final String ERROR_MSG = "ClassPathFileSystem is read only."; |
| |
| private Path working; |
| |
| @Override |
| public FSDataOutputStream append(Path arg0, int arg1, Progressable arg2) throws IOException { |
| throw new IOException(ERROR_MSG); |
| } |
| |
| @Override |
| public FSDataOutputStream create(Path arg0, FsPermission arg1, boolean arg2, int arg3, short arg4, long arg5, |
| Progressable arg6) throws IOException { |
| throw new IOException(ERROR_MSG); |
| } |
| |
| @Override |
| public boolean delete(Path arg0) throws IOException { |
| throw new IOException(ERROR_MSG); |
| } |
| |
| @Override |
| public boolean delete(Path arg0, boolean arg1) throws IOException { |
| throw new IOException(ERROR_MSG); |
| } |
| |
| private String getFileName(Path path){ |
| String file = path.toUri().getPath(); |
| if(file.charAt(0) == '/'){ |
| file = file.substring(1); |
| } |
| return file; |
| } |
| |
| @Override |
| public FileStatus getFileStatus(Path arg0) throws IOException { |
| String file = getFileName(arg0); |
| URL url; |
| |
| try{ |
| url = Resources.getResource(file); |
| }catch(IllegalArgumentException e){ |
| throw new FileNotFoundException(String.format("Unable to find path %s.", arg0.toString())); |
| } |
| |
| return new FileStatus(Resources.asByteSource(url).size(), false, 1, 8096, System.currentTimeMillis(), arg0); |
| } |
| |
| @Override |
| public URI getUri() { |
| try { |
| return new URI("classpath:///"); |
| } catch (URISyntaxException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public Path getWorkingDirectory() { |
| return working; |
| } |
| |
| @Override |
| public FileStatus[] listStatus(Path arg0) throws IOException { |
| throw new UnsupportedOperationException("ClassPathFileSystem doesn't currently support listing files."); |
| } |
| |
| @Override |
| public boolean mkdirs(Path arg0, FsPermission arg1) throws IOException { |
| throw new IOException(ERROR_MSG); |
| } |
| |
| @Override |
| public FSDataInputStream open(Path arg0, int arg1) throws IOException { |
| String file = getFileName(arg0); |
| URL url = Resources.getResource(file); |
| if(url == null){ |
| throw new IOException(String.format("Unable to find path %s.", arg0.getName())); |
| } |
| ResourceInputStream ris = new ResourceInputStream(Resources.toByteArray(url)); |
| return new FSDataInputStream(ris); |
| } |
| |
| @Override |
| public boolean rename(Path arg0, Path arg1) throws IOException { |
| throw new IOException(ERROR_MSG); |
| } |
| |
| @Override |
| public void setWorkingDirectory(Path arg0) { |
| this.working = arg0; |
| } |
| |
| public static void main(String[] args) throws Exception{ |
| URI uri = new URI("classpath:///"); |
| } |
| } |