Package org.jlab.jlog.util

Class IOUtil

java.lang.Object

org.jlab.jlog.util.IOUtil

public final class IOUtil
extends Object

IO Utilities.

Method Summary

Modifier and Type	Method	Description
static String	arrayToCSV(String[] values)	Converts an array of String values to a comma-separated-values String.
static void	closeQuietly(Closeable c)	Closes a Closeable without generating any checked Exceptions.
static long	copy(InputStream in, OutputStream out)	Copies all of the bytes from the InputStream into the OutputStream using a buffer of 4096 bytes.
static String[]	csvToArray(String values)	Converts a comma-separated-values String to an array of String values.
static byte[]	decodeBase64(String data)	Decodes a base64 String to an array of bytes.
static void	deleteQuietly(File file)	Deletes a file without generating any checked Exceptions.
static String	encodeBase64(byte[] data)	Encodes an array of bytes to base64.
static byte[]	fileToBytes(File file)	Fully reads in a file and returns an array of the bytes representing the file.
static String	streamToString(InputStream is, String encoding)	Reads in an InputStream fully and returns the result as a String.

Methods inherited from class java.lang.Object

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

Method Details

closeQuietly

public static void closeQuietly(Closeable c)

Closes a Closeable without generating any checked Exceptions. If an IOException does occur while closing it is logged as a WARNING.

Parameters:

c - The Closeable

deleteQuietly

public static void deleteQuietly(File file)

Deletes a file without generating any checked Exceptions. If unable to delete then a WARNING will be logged.

Parameters:

file - The file

fileToBytes

public static byte[] fileToBytes(File file)
                          throws IOException

Fully reads in a file and returns an array of the bytes representing the file. Be careful reading in large files because they may result in an OutOfMemoryError. This method uses the File length to efficiently allocate memory.

Parameters:

file - The file to load into memory.

Returns:

The bytes

Throws:

IOException - If an error occurs reading in the file.

copy

public static long copy(InputStream in,
 OutputStream out)
                 throws IOException

Copies all of the bytes from the InputStream into the OutputStream using a buffer of 4096 bytes.

Parameters:

in - The InputStream

out - The OutputStream

Returns:

The number of bytes copied

Throws:

IOException - If unable to copy

streamToString

public static String streamToString(InputStream is,
 String encoding)

Reads in an InputStream fully and returns the result as a String.

Parameters:

is - The InputStream

encoding - The character encoding of the String

Returns:

The String representation of the data

arrayToCSV

public static String arrayToCSV(String[] values)

Converts an array of String values to a comma-separated-values String.

Parameters:

values - The array

Returns:

The comma-separated-values

csvToArray

public static String[] csvToArray(String values)

Converts a comma-separated-values String to an array of String values. Whitespace on either side of commas are trimmed off.

Parameters:

values - The comma-separated-values

Returns:

The array of String values

encodeBase64

public static String encodeBase64(byte[] data)

Encodes an array of bytes to base64.

Parameters:

data - The bytes

Returns:

A base64 encoded String

decodeBase64

public static byte[] decodeBase64(String data)

Decodes a base64 String to an array of bytes.

Parameters:

data - The base64 encoded String

Returns:

The bytes