Package org.eclipse.aether.util

Class FileUtils

java.lang.Object

org.eclipse.aether.util.FileUtils

public final class FileUtils
extends Object

A utility class to write files.

Since:

1.9.0

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	FileUtils.CollocatedTempFile	A collocated temporary file, that resides next to a "target" file, and is removed when closed.
static interface	FileUtils.FileWriter	A file writer, that accepts a Path to write some content to.
static interface	FileUtils.TempFile	A temporary file, that is removed when closed.

Method Summary

Modifier and Type	Method	Description
static FileUtils.TempFile	newTempFile()	Creates a FileUtils.TempFile instance and backing temporary file on file system.
static FileUtils.CollocatedTempFile	newTempFile(Path file)	Creates a FileUtils.CollocatedTempFile instance for given file without backing file.
static void	writeFile(Path target, FileUtils.FileWriter writer)	Writes file without backup.
static void	writeFileWithBackup(Path target, FileUtils.FileWriter writer)	Writes file with backup copy (appends ".bak" extension).

Methods inherited from class java.lang.Object

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

Method Details

newTempFile

public static FileUtils.TempFile newTempFile()
                                      throws IOException

Creates a FileUtils.TempFile instance and backing temporary file on file system. It will be located in the default temporary-file directory. Returned instance should be handled in try-with-resource construct and created temp file is removed (if exists) when returned instance is closed.

This method uses Files.createTempFile(String, String, java.nio.file.attribute.FileAttribute[]) to create the temporary file on file system.

Throws:

IOException

newTempFile

public static FileUtils.CollocatedTempFile newTempFile(Path file)
                                                throws IOException

Creates a FileUtils.CollocatedTempFile instance for given file without backing file. The path will be located in same directory where given file is, and will reuse its name for generated (randomized) name. Returned instance should be handled in try-with-resource and created temp path is removed (if exists) when returned instance is closed. The FileUtils.CollocatedTempFile.move() makes possible to atomically replace passed in file with the processed content written into a file backing the FileUtils.CollocatedTempFile instance.

The file nor it's parent directories have to exist. The parent directories are created if needed.

This method uses Path.resolve(String) to create the temporary file path in passed in file parent directory, but it does NOT create backing file on file system.

Throws:

IOException

writeFile

public static void writeFile(Path target,
 FileUtils.FileWriter writer)
                      throws IOException

Writes file without backup.

Parameters:

target - that is the target file (must be file, the path must have parent).

writer - the writer that will accept a Path to write content to.

Throws:

IOException - if at any step IO problem occurs.

writeFileWithBackup

public static void writeFileWithBackup(Path target,
 FileUtils.FileWriter writer)
                                throws IOException

Writes file with backup copy (appends ".bak" extension).

Parameters:

target - that is the target file (must be file, the path must have parent).

writer - the writer that will accept a Path to write content to.

Throws:

IOException - if at any step IO problem occurs.