org.apache.paimon.utils

Class IOUtils

java.lang.Object

org.apache.paimon.utils.IOUtils

public final class IOUtils
extends Object

An utility class for I/O related functionality.

Field Summary

Fields

Modifier and Type	Field and Description
static int	BLOCKSIZE The block size for byte operations in byte.

Constructor Summary

Constructors

Constructor and Description
IOUtils()

Method Summary

Modifier and Type	Method and Description
static void	closeAll(AutoCloseable... closeables)
static void	closeAll(Iterable<? extends AutoCloseable> closeables) Closes all AutoCloseable objects in the parameter, suppressing exceptions.
static <T extends Throwable> void	closeAll(Iterable<? extends AutoCloseable> closeables, Class<T> suppressedException) Closes all AutoCloseable objects in the parameter, suppressing exceptions.
static void	closeAllQuietly(Iterable<? extends AutoCloseable> closeables) Closes all AutoCloseable objects in the parameter quietly.
static void	closeQuietly(AutoCloseable closeable) Closes the given AutoCloseable.
static void	copyBytes(InputStream in, OutputStream out) Copies from one stream to another.
static void	copyBytes(InputStream in, OutputStream out, int buffSize, boolean close) Copies from one stream to another.
static byte[]	readFully(InputStream in, boolean close) Reads all into a bytes.
static void	readFully(InputStream in, byte[] buf) Reads len bytes in a loop.
static void	readFully(InputStream in, byte[] buf, int off, int len) Reads len bytes in a loop.
static String	readUTF8Fully(InputStream in)

Methods inherited from class java.lang.Object

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

Field Detail

BLOCKSIZE

public static final int BLOCKSIZE

The block size for byte operations in byte.

See Also:

Constant Field Values

Constructor Detail

IOUtils

public IOUtils()

Method Detail

copyBytes

public static void copyBytes(InputStream in,
                             OutputStream out,
                             int buffSize,
                             boolean close)
                      throws IOException

Copies from one stream to another.

Parameters:

in - InputStream to read from

out - OutputStream to write to

buffSize - the size of the buffer

close - whether or not close the InputStream and OutputStream at the end. The streams are closed in the finally clause.

Throws:

IOException - thrown if an error occurred while writing to the output stream

copyBytes

public static void copyBytes(InputStream in,
                             OutputStream out)
                      throws IOException

Copies from one stream to another. closes the input and output streams at the end.

Parameters:

in - InputStream to read from

out - OutputStream to write to

Throws:

IOException - thrown if an I/O error occurs while copying

readFully

public static byte[] readFully(InputStream in,
                               boolean close)
                        throws IOException

Reads all into a bytes.

Throws:

IOException

readFully

public static void readFully(InputStream in,
                             byte[] buf)
                      throws IOException

Reads len bytes in a loop.

Parameters:

in - The InputStream to read from

buf - The buffer to fill

Throws:

IOException - if it could not read requested number of bytes for any reason (including EOF)

readFully

public static void readFully(InputStream in,
                             byte[] buf,
                             int off,
                             int len)
                      throws IOException

Reads len bytes in a loop.

Parameters:

in - The InputStream to read from

buf - The buffer to fill

off - offset from the buffer

len - the length of bytes to read

Throws:

IOException - if it could not read requested number of bytes for any reason (including EOF)

readUTF8Fully

public static String readUTF8Fully(InputStream in)
                            throws IOException

Throws:

IOException

closeAll

public static void closeAll(AutoCloseable... closeables)
                     throws Exception

Throws:

Exception

See Also:

closeAll(Iterable)

closeAll

public static void closeAll(Iterable<? extends AutoCloseable> closeables)
                     throws Exception

Closes all AutoCloseable objects in the parameter, suppressing exceptions. Exception will be emitted after calling close() on every object.

Parameters:

closeables - iterable with closeables to close.

Throws:

Exception - collected exceptions that occurred during closing

closeAll

public static <T extends Throwable> void closeAll(Iterable<? extends AutoCloseable> closeables,
                                                  Class<T> suppressedException)
                                           throws Exception

Closes all AutoCloseable objects in the parameter, suppressing exceptions. Exception will be emitted after calling close() on every object.

Parameters:

closeables - iterable with closeables to close.

suppressedException - class of exceptions which should be suppressed during the closing.

Throws:

Exception - collected exceptions that occurred during closing

closeAllQuietly

public static void closeAllQuietly(Iterable<? extends AutoCloseable> closeables)

Closes all AutoCloseable objects in the parameter quietly.

Important: This method is expected to never throw an exception.

closeQuietly

public static void closeQuietly(AutoCloseable closeable)

Closes the given AutoCloseable.

Important: This method is expected to never throw an exception.