org.apache.commons.compress.utils

Class IOUtils

java.lang.Object

org.apache.commons.compress.utils.IOUtils

public final class IOUtils
extends java.lang.Object

Utility functions.

Field Summary

Fields

Modifier and Type	Field and Description
static java.nio.file.LinkOption[]	EMPTY_LINK_OPTIONS Empty array of type LinkOption.

Method Summary

Modifier and Type	Method and Description
static void	closeQuietly(java.io.Closeable c) Deprecated. Use IOUtils.closeQuietly(Closeable).
static void	copy(java.io.File sourceFile, java.io.OutputStream outputStream) Deprecated. Use FileUtils.copyFile(File, OutputStream).
static long	copy(java.io.InputStream input, java.io.OutputStream output) Deprecated. Use IOUtils.copy(InputStream, OutputStream).
static long	copy(java.io.InputStream input, java.io.OutputStream output, int bufferSize) Deprecated. Use IOUtils.copy(InputStream, OutputStream, int).
static long	copyRange(java.io.InputStream input, long len, java.io.OutputStream output) Deprecated. Use IOUtils.copyLarge(InputStream, OutputStream, long, long).
static long	copyRange(java.io.InputStream input, long length, java.io.OutputStream output, int bufferSize) Deprecated. No longer used.
static int	read(java.io.File file, byte[] array) Deprecated. Use Files.readAllBytes(java.nio.file.Path).
static int	readFully(java.io.InputStream input, byte[] array) Reads as much from input as possible to fill the given array.
static int	readFully(java.io.InputStream input, byte[] array, int offset, int length) Reads as much from input as possible to fill the given array with the given amount of bytes.
static void	readFully(java.nio.channels.ReadableByteChannel channel, java.nio.ByteBuffer byteBuffer) Reads b.remaining() bytes from the given channel starting at the current channel's position.
static byte[]	readRange(java.io.InputStream input, int length) Gets part of the contents of an InputStream as a byte[].
static byte[]	readRange(java.nio.channels.ReadableByteChannel input, int length) Gets part of the contents of an ReadableByteChannel as a byte[].
static long	skip(java.io.InputStream input, long toSkip) Skips bytes from an input byte stream.
static byte[]	toByteArray(java.io.InputStream input) Deprecated. Use IOUtils.toByteArray(InputStream).

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_LINK_OPTIONS

public static final java.nio.file.LinkOption[] EMPTY_LINK_OPTIONS

Empty array of type LinkOption.

Since:

1.21

Method Detail

closeQuietly

@Deprecated
public static void closeQuietly(java.io.Closeable c)

Deprecated. Use IOUtils.closeQuietly(Closeable).

Closes the given Closeable and swallows any IOException that may occur.

Parameters:

c - Closeable to close, can be null

Since:

1.7

copy

@Deprecated
public static void copy(java.io.File sourceFile,
                                    java.io.OutputStream outputStream)
                             throws java.io.IOException

Deprecated. Use FileUtils.copyFile(File, OutputStream).

Copies the source file to the given output stream.

Parameters:

sourceFile - The file to read.

outputStream - The output stream to write.

Throws:

java.io.IOException - if an I/O error occurs when reading or writing.

Since:

1.21

copy

@Deprecated
public static long copy(java.io.InputStream input,
                                    java.io.OutputStream output)
                             throws java.io.IOException

Deprecated. Use IOUtils.copy(InputStream, OutputStream).

Copies the content of a InputStream into an OutputStream. Uses a default buffer size of 8024 bytes.

Parameters:

input - the InputStream to copy

output - the target, may be null to simulate output to dev/null on Linux and NUL on Windows

Returns:

the number of bytes copied

Throws:

java.io.IOException - if an error occurs

copy

@Deprecated
public static long copy(java.io.InputStream input,
                                    java.io.OutputStream output,
                                    int bufferSize)
                             throws java.io.IOException

Deprecated. Use IOUtils.copy(InputStream, OutputStream, int).

Copies the content of a InputStream into an OutputStream

Parameters:

input - the InputStream to copy

output - the target, may be null to simulate output to dev/null on Linux and NUL on Windows

bufferSize - the buffer size to use, must be bigger than 0

Returns:

the number of bytes copied

Throws:

java.io.IOException - if an error occurs

java.lang.IllegalArgumentException - if bufferSize is smaller than or equal to 0

copyRange

@Deprecated
public static long copyRange(java.io.InputStream input,
                                         long len,
                                         java.io.OutputStream output)
                                  throws java.io.IOException

Deprecated. Use IOUtils.copyLarge(InputStream, OutputStream, long, long).

Copies part of the content of a InputStream into an OutputStream. Uses a default buffer size of 8024 bytes.

Parameters:

input - the InputStream to copy

output - the target Stream

len - maximum amount of bytes to copy

Returns:

the number of bytes copied

Throws:

java.io.IOException - if an error occurs

Since:

1.21

copyRange

@Deprecated
public static long copyRange(java.io.InputStream input,
                                         long length,
                                         java.io.OutputStream output,
                                         int bufferSize)
                                  throws java.io.IOException

Deprecated. No longer used.

Copies part of the content of a InputStream into an OutputStream

Parameters:

input - the InputStream to copy

length - maximum amount of bytes to copy

output - the target, may be null to simulate output to dev/null on Linux and NUL on Windows

bufferSize - the buffer size to use, must be bigger than 0

Returns:

the number of bytes copied

Throws:

java.io.IOException - if an error occurs

java.lang.IllegalArgumentException - if bufferSize is smaller than or equal to 0

Since:

1.21

read

@Deprecated
public static int read(java.io.File file,
                                   byte[] array)
                            throws java.io.IOException

Deprecated. Use Files.readAllBytes(java.nio.file.Path).

Reads as much from the file as possible to fill the given array.

This method may invoke read repeatedly to fill the array and only read less bytes than the length of the array if the end of the stream has been reached.

Parameters:

file - file to read

array - buffer to fill

Returns:

the number of bytes actually read

Throws:

java.io.IOException - on error

Since:

1.20

readFully

public static int readFully(java.io.InputStream input,
                            byte[] array)
                     throws java.io.IOException

Reads as much from input as possible to fill the given array.

This method may invoke read repeatedly to fill the array and only read less bytes than the length of the array if the end of the stream has been reached.

Parameters:

input - stream to read from

array - buffer to fill

Returns:

the number of bytes actually read

Throws:

java.io.IOException - on error

readFully

public static int readFully(java.io.InputStream input,
                            byte[] array,
                            int offset,
                            int length)
                     throws java.io.IOException

Reads as much from input as possible to fill the given array with the given amount of bytes.

This method may invoke read repeatedly to read the bytes and only read less bytes than the requested length if the end of the stream has been reached.

Parameters:

input - stream to read from

array - buffer to fill

offset - offset into the buffer to start filling at

length - of bytes to read

Returns:

the number of bytes actually read

Throws:

java.io.IOException - if an I/O error has occurred

readFully

public static void readFully(java.nio.channels.ReadableByteChannel channel,
                             java.nio.ByteBuffer byteBuffer)
                      throws java.io.IOException

Reads b.remaining() bytes from the given channel starting at the current channel's position.

This method reads repeatedly from the channel until the requested number of bytes are read. This method blocks until the requested number of bytes are read, the end of the channel is detected, or an exception is thrown.

Parameters:

channel - the channel to read from

byteBuffer - the buffer into which the data is read.

Throws:

java.io.IOException - if an I/O error occurs.

java.io.EOFException - if the channel reaches the end before reading all the bytes.

readRange

public static byte[] readRange(java.io.InputStream input,
                               int length)
                        throws java.io.IOException

Gets part of the contents of an InputStream as a byte[].

Parameters:

input - the InputStream to read from

length - maximum amount of bytes to copy

Returns:

the requested byte array

Throws:

java.lang.NullPointerException - if the input is null

java.io.IOException - if an I/O error occurs

Since:

1.21

readRange

public static byte[] readRange(java.nio.channels.ReadableByteChannel input,
                               int length)
                        throws java.io.IOException

Gets part of the contents of an ReadableByteChannel as a byte[].

Parameters:

input - the ReadableByteChannel to read from

length - maximum amount of bytes to copy

Returns:

the requested byte array

Throws:

java.lang.NullPointerException - if the input is null

java.io.IOException - if an I/O error occurs

Since:

1.21

skip

public static long skip(java.io.InputStream input,
                        long toSkip)
                 throws java.io.IOException

Skips bytes from an input byte stream.

This method will only skip less than the requested number of bytes if the end of the input stream has been reached.

Parameters:

input - stream to skip bytes in

toSkip - the number of bytes to skip

Returns:

the number of bytes actually skipped

Throws:

java.io.IOException - on error

toByteArray

@Deprecated
public static byte[] toByteArray(java.io.InputStream input)
                                      throws java.io.IOException

Deprecated. Use IOUtils.toByteArray(InputStream).

Gets the contents of an InputStream as a byte[].

This method buffers the input internally, so there is no need to use a BufferedInputStream.

Parameters:

input - the InputStream to read from

Returns:

the requested byte array

Throws:

java.lang.NullPointerException - if the input is null

java.io.IOException - if an I/O error occurs

Since:

1.5