| /* |
| * 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.common.util; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.net.URL; |
| import java.nio.charset.StandardCharsets; |
| |
| import com.google.common.io.Files; |
| |
| public class DrillFileUtils { |
| // These two separators are intentionally used instead of Path.SEPARATOR or File.separator |
| // for loading classes since both alternatives return '\' on Windows. However, in the context |
| // of classpath scanning and loading only '/' is valid. |
| public static final char SEPARATOR_CHAR = '/'; |
| public static final String SEPARATOR = "/"; |
| |
| public static File getResourceAsFile(String fileName) throws IOException { |
| URL u = DrillFileUtils.class.getResource(fileName); |
| if (u == null) { |
| throw new FileNotFoundException(String.format("Unable to find file on path %s", fileName)); |
| } |
| return new File(u.getPath()); |
| } |
| |
| public static String getResourceAsString(String fileName) throws IOException { |
| return Files.asCharSource(getResourceAsFile(fileName), StandardCharsets.UTF_8).read(); |
| } |
| |
| /** |
| * Creates a temporary directory under the default temporary directory location. |
| * This is a safe replacement for Guava {@code Files#createTempDir()} |
| * |
| * @return a temporary directory |
| * @throws IllegalStateException if the directory cannot be created |
| */ |
| public static File createTempDir() { |
| try { |
| return java.nio.file.Files.createTempDirectory(System.currentTimeMillis() + "-").toFile(); |
| } catch (IOException e) { |
| throw new IllegalStateException("Failed to create temporary directory"); |
| } |
| } |
| } |