Package org.variantsync.diffdetective.util

Class IO

java.lang.Object

org.variantsync.diffdetective.util.IO

public class IO
extends Object

Util class for exporting data.

Author:

Sören Viegener

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	CSV_DELIMITER

Constructor Summary

Constructors

Constructor	Description
IO()

Method Summary

Modifier and Type	Method	Description
static void	append(Path p, String text)	Appends the given text to the given file.
static void	createParentDirectories(Path file)	Creates all parent directories of file.
static void	exportCsv(String fileName, String[] headers, Object[]... objects)	Exports data to a csv-file
static BufferedOutputStream	newBufferedOutputStream(Path file, OpenOption... openOptions)	Same as Files.newOutputStream(java.nio.file.Path, java.nio.file.OpenOption...) but creates all parent directories of file and wraps the result in a BufferedOutputStream.
static boolean	tryDeleteFile(Path file)	Deletes file if it exists.
static Optional<URI>	tryParseURI(String uri)	Parses the string uri into an URI object.
static void	tryWrite(Path outputPath, String data)	Writes data to the file outputPath.
static void	write(Path p, String text)	Writes the given text to the given file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

CSV_DELIMITER

private static final String CSV_DELIMITER

See Also:

• Constant Field Values

Constructor Details

IO

public IO()

Method Details

exportCsv

public static void exportCsv(String fileName,
 String[] headers,
 Object[]... objects)
                      throws FileNotFoundException

Exports data to a csv-file

Parameters:

fileName - Name of the file to export to

headers - Names of the headers of the table

objects - Array of array of objects. The amount of objects has to equal the length of the headers array

Throws:

FileNotFoundException - When the fileName is not a valid file path

createParentDirectories

public static void createParentDirectories(Path file)
                                    throws IOException

Creates all parent directories of file.

Throws:

IOException

newBufferedOutputStream

public static BufferedOutputStream newBufferedOutputStream(Path file,
 OpenOption... openOptions)
                                                    throws IOException

Same as Files.newOutputStream(java.nio.file.Path, java.nio.file.OpenOption...) but creates all parent directories of file and wraps the result in a BufferedOutputStream.

Throws:

IOException

write

public static void write(Path p,
 String text)
                  throws IOException

Writes the given text to the given file. Creates a new file and its parent directories if necessary. It assumes that no file exists yet at the given path.

Parameters:

p - file to create and fill with text

text - text to write to the file

Throws:

IOException - if p already exists, an I/O error occurs writing to or creating the file, or the text cannot be encoded using UTF-8

append

public static void append(Path p,
 String text)
                   throws IOException

Appends the given text to the given file. Creates a new file and its parent directories if necessary. It the file already exists text is appended to the file.

Parameters:

p - file to create and fill with text

text - text to write to the file

Throws:

IOException - if an I/O error occurs appending to or creating the file, or the text cannot be encoded using UTF-8

tryWrite

public static void tryWrite(Path outputPath,
 String data)

Writes data to the file outputPath. outputPath and its parent directories will be created if necessary. If outputPath already exists, no data is written.

tryParseURI

public static Optional<URI> tryParseURI(String uri)

Parses the string uri into an URI object.

The purpose of this function is to handle parse failures in a functional way (using Optional instead of with exceptions.

Parameters:

uri - the String to be parsed as an URI

Returns:

the parsed URI if uri is valid or an empty optional on parse failures

tryDeleteFile

public static boolean tryDeleteFile(Path file)

Deletes file if it exists.

Returns:

false if the file system signals an error