org.apache.commons.io

Enum RandomAccessFileMode

java.lang.Object

java.lang.Enum<RandomAccessFileMode>

org.apache.commons.io.RandomAccessFileMode

All Implemented Interfaces:

Serializable, Comparable<RandomAccessFileMode>

public enum RandomAccessFileMode
extends Enum<RandomAccessFileMode>

Enumerates access modes for RandomAccessFile with factory methods.

See Also:

RandomAccessFile(File, String), RandomAccessFile(String, String), Enum

Enum Constant Summary

Enum Constants

Enum Constant and Description
READ_ONLY Defines mode "r" to open a RandomAccessFile for reading only.
READ_WRITE Defines mode "rw" to open a RandomAccessFile for reading and writing.
READ_WRITE_SYNC_ALL Defines mode "rws" to open a RandomAccessFile for reading and writing, as with "rw", and also require that every update to the file's content or metadata be written synchronously to the underlying storage device.
READ_WRITE_SYNC_CONTENT Defines mode "rwd" to open a RandomAccessFile for reading and writing, as with "rw", and also require that every update to the file's content be written synchronously to the underlying storage device.

Field Summary

Fields

Modifier and Type	Field and Description
static String	R
static String	RW
static String	RWD
static String	RWS

Method Summary

Modifier and Type	Method and Description
void	accept(Path file, IOConsumer<RandomAccessFile> consumer) Performs an operation on the RandomAccessFile specified at the given Path.
<T> T	apply(Path file, IOFunction<RandomAccessFile,T> function) Applies the given function for a RandomAccessFile specified at the given Path.
RandomAccessFile	create(File file) Constructs a random access file to read from, and optionally to write to, the file specified by the File argument.
RandomAccessFile	create(Path file) Constructs a random access file to read from, and optionally to write to, the file specified by the File argument.
RandomAccessFile	create(String name) Constructs a random access file to read from, and optionally to write to, the file specified by the File argument.
String	getMode() Gets the access mode, one of "r", "rw", "rwd", or "rws".
boolean	implies(RandomAccessFileMode other) Tests whether this mode implies the given other mode.
IORandomAccessFile	io(String name) Constructs a random access file to read from, and optionally to write to, the file specified by the File argument.
static RandomAccessFileMode	valueOf(OpenOption... openOption) Gets the enum value that best fits the given OpenOptions.
static RandomAccessFileMode	valueOf(String name) Returns the enum constant of this type with the specified name.
static RandomAccessFileMode	valueOfMode(String mode) Gets the RandomAccessFileMode value for the given mode, one of "r", "rw", "rwd", or "rws".
static RandomAccessFileMode[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

READ_ONLY

public static final RandomAccessFileMode READ_ONLY

Defines mode "r" to open a RandomAccessFile for reading only.

See Also:

RandomAccessFile(File, String), RandomAccessFile(String, String)

READ_WRITE

public static final RandomAccessFileMode READ_WRITE

Defines mode "rw" to open a RandomAccessFile for reading and writing.

See Also:

RandomAccessFile(File, String), RandomAccessFile(String, String)

READ_WRITE_SYNC_ALL

public static final RandomAccessFileMode READ_WRITE_SYNC_ALL

Defines mode "rws" to open a RandomAccessFile for reading and writing, as with "rw", and also require that every update to the file's content or metadata be written synchronously to the underlying storage device.

See Also:

RandomAccessFile(File, String), RandomAccessFile(String, String), StandardOpenOption.SYNC

READ_WRITE_SYNC_CONTENT

public static final RandomAccessFileMode READ_WRITE_SYNC_CONTENT

Defines mode "rwd" to open a RandomAccessFile for reading and writing, as with "rw", and also require that every update to the file's content be written synchronously to the underlying storage device.

See Also:

RandomAccessFile(File, String), RandomAccessFile(String, String), StandardOpenOption.DSYNC

Field Detail

R

public static final String R

See Also:

Constant Field Values

RW

public static final String RW

See Also:

Constant Field Values

RWD

public static final String RWD

See Also:

Constant Field Values

RWS

public static final String RWS

See Also:

Constant Field Values

Method Detail

accept

public void accept(Path file,
                   IOConsumer<RandomAccessFile> consumer)
            throws IOException

Performs an operation on the RandomAccessFile specified at the given Path.

This method allocates and releases the RandomAccessFile given to the consumer.

Parameters:

file - the file specifying the RandomAccessFile to open.

consumer - the function to apply.

Throws:

FileNotFoundException - See IORandomAccessFile(File, String).

IOException - Thrown by the given function.

apply

public <T> T apply(Path file,
                   IOFunction<RandomAccessFile,T> function)
            throws IOException

Applies the given function for a RandomAccessFile specified at the given Path.

This method allocates and releases the RandomAccessFile given to the function.

Type Parameters:

T - the return type of the function.

Parameters:

file - the file specifying the RandomAccessFile to open.

function - the function to apply.

Returns:

the function's result value.

Throws:

FileNotFoundException - See IORandomAccessFile(File, String).

IOException - Thrown by the given function.

create

public RandomAccessFile create(File file)
                        throws FileNotFoundException

Constructs a random access file to read from, and optionally to write to, the file specified by the File argument.

Prefer create(Path) over this.

Parameters:

file - the file object

Returns:

a random access file

Throws:

FileNotFoundException - See IORandomAccessFile(File, String).

create

public RandomAccessFile create(Path file)
                        throws FileNotFoundException

Constructs a random access file to read from, and optionally to write to, the file specified by the File argument.

Parameters:

file - the file object

Returns:

a random access file

Throws:

FileNotFoundException - See IORandomAccessFile(File, String).

create

public RandomAccessFile create(String name)
                        throws FileNotFoundException

Constructs a random access file to read from, and optionally to write to, the file specified by the File argument.

Prefer create(Path) over this.

Parameters:

name - the file object

Returns:

a random access file

Throws:

FileNotFoundException - See IORandomAccessFile(File, String).

getMode

public String getMode()

Gets the access mode, one of "r", "rw", "rwd", or "rws".

Returns:

one of "r", "rw", "rwd", or "rws".

implies

public boolean implies(RandomAccessFileMode other)

Tests whether this mode implies the given other mode.

For example:

1. READ_WRITE_SYNC_ALL implies {READ_WRITE_SYNC_CONTENT}.
2. READ_WRITE_SYNC_CONTENT implies {READ_WRITE}.
3. READ_WRITE implies {READ_ONLY}.

Parameters:

other - the non-null mode to test against.

Returns:

whether this mode implies the given other mode.

io

public IORandomAccessFile io(String name)
                      throws FileNotFoundException

Constructs a random access file to read from, and optionally to write to, the file specified by the File argument.

Parameters:

name - the file object

Returns:

a random access file

Throws:

FileNotFoundException - See IORandomAccessFile(File, String).

valueOf

public static RandomAccessFileMode valueOf(OpenOption... openOption)

Gets the enum value that best fits the given OpenOptions.

The input must be a legal and working combination for NIO.

Parameters:

openOption - options like StandardOpenOption.

Returns:

best fit, by default READ_ONLY.

See Also:

StandardOpenOption

valueOf

public static RandomAccessFileMode valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

valueOfMode

public static RandomAccessFileMode valueOfMode(String mode)

Gets the RandomAccessFileMode value for the given mode, one of "r", "rw", "rwd", or "rws".

Parameters:

mode - one of "r", "rw", "rwd", or "rws".

Returns:

A RandomAccessFileMode.

Throws:

IllegalArgumentException - Thrown when mode is not one of "r", "rw", "rwd", or "rws".

values

public static RandomAccessFileMode[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (RandomAccessFileMode c : RandomAccessFileMode.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared