org.elasticsearch.common.io

Class Streams

java.lang.Object

org.elasticsearch.common.io.Streams

public abstract class Streams
extends Object

Simple utility methods for file and stream copying. All copy methods use a block size of 4096 bytes, and close all affected streams when done.

Mainly for use within the framework, but also useful for application code.

Field Summary

Fields

Modifier and Type	Field and Description
static int	BUFFER_SIZE

Constructor Summary

Constructors

Constructor and Description
Streams()

Method Summary

Modifier and Type	Method and Description
static void	copy(byte[] in, File out) Copy the contents of the given byte array to the given output File.
static void	copy(byte[] in, OutputStream out) Copy the contents of the given byte array to the given OutputStream.
static long	copy(File in, File out) Copy the contents of the given input File to the given output File.
static long	copy(InputStream in, OutputStream out)
static long	copy(InputStream in, OutputStream out, byte[] buffer) Copy the contents of the given InputStream to the given OutputStream.
static int	copy(Reader in, Writer out) Copy the contents of the given Reader to the given Writer.
static void	copy(String in, Writer out) Copy the contents of the given String to the given output Writer.
static byte[]	copyToByteArray(File in) Copy the contents of the given input File into a new byte array.
static byte[]	copyToByteArray(InputStream in) Copy the contents of the given InputStream into a new byte array.
static byte[]	copyToBytesFromClasspath(String path)
static String	copyToString(Reader in) Copy the contents of the given Reader into a String.
static String	copyToStringFromClasspath(ClassLoader classLoader, String path)
static String	copyToStringFromClasspath(String path)
static List<String>	readAllLines(InputStream input)
static void	readAllLines(InputStream input, Callback<String> callback)
static int	readFully(InputStream reader, byte[] dest)
static int	readFully(InputStream reader, byte[] dest, int offset, int len)
static int	readFully(Reader reader, char[] dest)
static int	readFully(Reader reader, char[] dest, int offset, int len)

Methods inherited from class java.lang.Object

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

Field Detail

BUFFER_SIZE

public static final int BUFFER_SIZE

See Also:

Constant Field Values

Constructor Detail

Streams

public Streams()

Method Detail

copy

public static long copy(File in,
                        File out)
                 throws IOException

Copy the contents of the given input File to the given output File.

Parameters:

in - the file to copy from

out - the file to copy to

Returns:

the number of bytes copied

Throws:

IOException - in case of I/O errors

copy

public static void copy(byte[] in,
                        File out)
                 throws IOException

Copy the contents of the given byte array to the given output File.

Parameters:

in - the byte array to copy from

out - the file to copy to

Throws:

IOException - in case of I/O errors

copyToByteArray

public static byte[] copyToByteArray(File in)
                              throws IOException

Copy the contents of the given input File into a new byte array.

Parameters:

in - the file to copy from

Returns:

the new byte array that has been copied to

Throws:

IOException - in case of I/O errors

copy

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

Throws:

IOException

copy

public static long copy(InputStream in,
                        OutputStream out,
                        byte[] buffer)
                 throws IOException

Copy the contents of the given InputStream to the given OutputStream. Closes both streams when done.

Parameters:

in - the stream to copy from

out - the stream to copy to

Returns:

the number of bytes copied

Throws:

IOException - in case of I/O errors

copy

public static void copy(byte[] in,
                        OutputStream out)
                 throws IOException

Copy the contents of the given byte array to the given OutputStream. Closes the stream when done.

Parameters:

in - the byte array to copy from

out - the OutputStream to copy to

Throws:

IOException - in case of I/O errors

copyToByteArray

public static byte[] copyToByteArray(InputStream in)
                              throws IOException

Copy the contents of the given InputStream into a new byte array. Closes the stream when done.

Parameters:

in - the stream to copy from

Returns:

the new byte array that has been copied to

Throws:

IOException - in case of I/O errors

copy

public static int copy(Reader in,
                       Writer out)
                throws IOException

Copy the contents of the given Reader to the given Writer. Closes both when done.

Parameters:

in - the Reader to copy from

out - the Writer to copy to

Returns:

the number of characters copied

Throws:

IOException - in case of I/O errors

copy

public static void copy(String in,
                        Writer out)
                 throws IOException

Copy the contents of the given String to the given output Writer. Closes the write when done.

Parameters:

in - the String to copy from

out - the Writer to copy to

Throws:

IOException - in case of I/O errors

copyToString

public static String copyToString(Reader in)
                           throws IOException

Copy the contents of the given Reader into a String. Closes the reader when done.

Parameters:

in - the reader to copy from

Returns:

the String that has been copied to

Throws:

IOException - in case of I/O errors

copyToStringFromClasspath

public static String copyToStringFromClasspath(ClassLoader classLoader,
                                               String path)
                                        throws IOException

Throws:

IOException

copyToStringFromClasspath

public static String copyToStringFromClasspath(String path)
                                        throws IOException

Throws:

IOException

copyToBytesFromClasspath

public static byte[] copyToBytesFromClasspath(String path)
                                       throws IOException

Throws:

IOException

readFully

public static int readFully(Reader reader,
                            char[] dest)
                     throws IOException

Throws:

IOException

readFully

public static int readFully(Reader reader,
                            char[] dest,
                            int offset,
                            int len)
                     throws IOException

Throws:

IOException

readFully

public static int readFully(InputStream reader,
                            byte[] dest)
                     throws IOException

Throws:

IOException

readFully

public static int readFully(InputStream reader,
                            byte[] dest,
                            int offset,
                            int len)
                     throws IOException

Throws:

IOException

readAllLines

public static List<String> readAllLines(InputStream input)
                                 throws IOException

Throws:

IOException

readAllLines

public static void readAllLines(InputStream input,
                                Callback<String> callback)
                         throws IOException

Throws:

IOException