Java tutorial
/** * 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.apex.malhar.lib.utils; import java.net.URI; import javax.annotation.Nullable; import javax.validation.constraints.NotNull; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.FileContext; import org.apache.hadoop.fs.Path; import org.apache.hadoop.fs.UnsupportedFileSystemException; import com.google.common.base.Preconditions; /** * @since 3.4.0 */ public class FileContextUtils { public static FileContext getFileContext(@NotNull Path path) throws UnsupportedFileSystemException { return getFileContext(path, null); } public static FileContext getFileContext(@NotNull String path) throws UnsupportedFileSystemException { Preconditions.checkNotNull(path, "path"); return getFileContext(new Path(path), null); } public static FileContext getFileContext(@NotNull String path, @Nullable Configuration conf) throws UnsupportedFileSystemException { Preconditions.checkNotNull(path, "path"); return getFileContext(new Path(path), conf); } public static FileContext getFileContext(@NotNull Path path, @Nullable Configuration conf) throws UnsupportedFileSystemException { Preconditions.checkNotNull(path, "path"); URI pathUri = path.toUri(); if (pathUri.getScheme() != null) { return FileContext.getFileContext(pathUri, conf == null ? new Configuration() : conf); } else { return FileContext.getFileContext(conf == null ? new Configuration() : conf); } } }