D-Net

package eu.dnetlib.dhp.common.java.io;

import java.io.File;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.fs.FSDataInputStream;

import org.apache.hadoop.fs.FileSystem;

import org.apache.hadoop.fs.Path;

/**

 * Path to a directory or a file along with information about the 

 * file system in which the path is defined.

 * 

 * @author Mateusz Kobos

 *

 */

public class FileSystemPath {

	private final FileSystem fs;

	private final Path path;

	/**

	 * Path in the local file system

	 */

	public FileSystemPath(File file) throws IOException {

		this(new Path(file.toURI()));

	}

	/**

	 * Path in the local file system

	 */

	public FileSystemPath(Path path) throws IOException{

		this(FileSystem.get(new Configuration(false)), path);

	}

	/**

	 * Path in the given file system

	 */

	public FileSystemPath(FileSystem fs, Path path){

		this.fs = fs;

		this.path = path;

	}

	/** Create a path with a child element */

	public FileSystemPath(FileSystemPath parent, String child){

		this.fs = parent.getFileSystem();

		this.path = new Path(parent.getPath(), child);

	}

	public FileSystem getFileSystem() {

		return fs;

	}

	public Path getPath() {

		return path;

	}

	public FSDataInputStream getInputStream() throws IOException{

		return getFileSystem().open(getPath());

	}

}