net.tribe7.common.io

Class ByteStreams

java.lang.Object

net.tribe7.common.io.ByteStreams

@Beta
public final class ByteStreams
extends java.lang.Object

Provides utility methods for working with byte arrays and I/O streams.

Since:

1.0

Method Summary

Methods

Modifier and Type	Method and Description
static ByteSink	asByteSink(OutputSupplier<? extends java.io.OutputStream> supplier) Deprecated. Convert all OutputSupplier<? extends OutputStream> implementations to extend ByteSink or provide a method for viewing the object as a ByteSink. This method is scheduled for removal in Guava 18.0.
static ByteSource	asByteSource(InputSupplier<? extends java.io.InputStream> supplier) Deprecated. Convert all InputSupplier<? extends InputStream> implementations to extend ByteSource or provide a method for viewing the object as a ByteSource. This method is scheduled for removal in Guava 18.0.
static long	copy(java.io.InputStream from, java.io.OutputStream to) Copies all bytes from the input stream to the output stream.
static long	copy(java.io.InputStream from, OutputSupplier<? extends java.io.OutputStream> to) Deprecated. Use ByteSink.writeFrom(InputStream) instead. This method is scheduled for removal in Guava 18.0.
static long	copy(InputSupplier<? extends java.io.InputStream> from, java.io.OutputStream to) Deprecated. Use ByteSource.copyTo(OutputStream) instead. This method is scheduled for removal in Guava 18.0.
static long	copy(InputSupplier<? extends java.io.InputStream> from, OutputSupplier<? extends java.io.OutputStream> to) Deprecated. Use ByteSource.copyTo(ByteSink) instead. This method is scheduled for removal in Guava 18.0.
static long	copy(java.nio.channels.ReadableByteChannel from, java.nio.channels.WritableByteChannel to) Copies all bytes from the readable channel to the writable channel.
static boolean	equal(InputSupplier<? extends java.io.InputStream> supplier1, InputSupplier<? extends java.io.InputStream> supplier2) Deprecated. Use ByteSource.contentEquals(ByteSource) instead. This method is scheduled for removal in Guava 18.0.
static net.tribe7.common.hash.HashCode	hash(InputSupplier<? extends java.io.InputStream> supplier, net.tribe7.common.hash.HashFunction hashFunction) Deprecated. Use ByteSource.hash(HashFunction) instead. This method is scheduled for removal in Guava 18.0.
static InputSupplier<java.io.InputStream>	join(InputSupplier<? extends java.io.InputStream>... suppliers) Deprecated. Use ByteSource.concat(ByteSource[]) instead. This method is scheduled for removal in Guava 18.0.
static InputSupplier<java.io.InputStream>	join(java.lang.Iterable<? extends InputSupplier<? extends java.io.InputStream>> suppliers) Deprecated. Use ByteSource.concat(Iterable) instead. This method is scheduled for removal in Guava 18.0.
static long	length(InputSupplier<? extends java.io.InputStream> supplier) Deprecated. Use ByteSource.size() instead. This method is scheduled for removal in Guava 18.0.
static java.io.InputStream	limit(java.io.InputStream in, long limit) Wraps a InputStream, limiting the number of bytes which can be read.
static ByteArrayDataInput	newDataInput(byte[] bytes) Returns a new ByteArrayDataInput instance to read from the bytes array from the beginning.
static ByteArrayDataInput	newDataInput(byte[] bytes, int start) Returns a new ByteArrayDataInput instance to read from the bytes array, starting at the given position.
static ByteArrayDataOutput	newDataOutput() Returns a new ByteArrayDataOutput instance with a default size.
static ByteArrayDataOutput	newDataOutput(int size) Returns a new ByteArrayDataOutput instance sized to hold size bytes before resizing.
static InputSupplier<java.io.ByteArrayInputStream>	newInputStreamSupplier(byte[] b) Deprecated. Use ByteSource.wrap(byte[]) instead. This method is scheduled for removal in Guava 18.0.
static InputSupplier<java.io.ByteArrayInputStream>	newInputStreamSupplier(byte[] b, int off, int len) Deprecated. Use ByteSource.wrap(b).slice(off, len) instead. This method is scheduled for removal in Guava 18.0.
static java.io.OutputStream	nullOutputStream() Returns an OutputStream that simply discards written bytes.
static int	read(java.io.InputStream in, byte[] b, int off, int len) Reads some bytes from an input stream and stores them into the buffer array b.
static <T> T	readBytes(java.io.InputStream input, ByteProcessor<T> processor) Process the bytes of the given input stream using the given processor.
static <T> T	readBytes(InputSupplier<? extends java.io.InputStream> supplier, ByteProcessor<T> processor) Deprecated. Use ByteSource.read(ByteProcessor) instead. This method is scheduled for removal in Guava 18.0.
static void	readFully(java.io.InputStream in, byte[] b) Attempts to read enough bytes from the stream to fill the given byte array, with the same behavior as DataInput.readFully(byte[]).
static void	readFully(java.io.InputStream in, byte[] b, int off, int len) Attempts to read len bytes from the stream into the given array starting at off, with the same behavior as DataInput.readFully(byte[], int, int).
static void	skipFully(java.io.InputStream in, long n) Discards n bytes of data from the input stream.
static InputSupplier<java.io.InputStream>	slice(InputSupplier<? extends java.io.InputStream> supplier, long offset, long length) Deprecated. Use ByteSource#slice(int, int) instead. This method is scheduled for removal in Guava 18.0.
static byte[]	toByteArray(java.io.InputStream in) Reads all bytes from an input stream into a byte array.
static byte[]	toByteArray(InputSupplier<? extends java.io.InputStream> supplier) Deprecated. Use ByteSource.read() instead. This method is scheduled for removal in Guava 18.0.
static void	write(byte[] from, OutputSupplier<? extends java.io.OutputStream> to) Deprecated. Use ByteSink.write(byte[]) instead. This method is scheduled for removal in Guava 18.0.

Methods inherited from class java.lang.Object

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

Method Detail

newInputStreamSupplier

@Deprecated
public static InputSupplier<java.io.ByteArrayInputStream> newInputStreamSupplier(byte[] b)

Deprecated. Use ByteSource.wrap(byte[]) instead. This method is scheduled for removal in Guava 18.0.

Returns a factory that will supply instances of ByteArrayInputStream that read from the given byte array.

Parameters:

b - the input buffer

Returns:

the factory

newInputStreamSupplier

@Deprecated
public static InputSupplier<java.io.ByteArrayInputStream> newInputStreamSupplier(byte[] b,
                                                                            int off,
                                                                            int len)

Deprecated. Use ByteSource.wrap(b).slice(off, len) instead. This method is scheduled for removal in Guava 18.0.

Returns a factory that will supply instances of ByteArrayInputStream that read from the given byte array.

Parameters:

b - the input buffer

off - the offset in the buffer of the first byte to read

len - the maximum number of bytes to read from the buffer

Returns:

the factory

write

@Deprecated
public static void write(byte[] from,
                    OutputSupplier<? extends java.io.OutputStream> to)
                  throws java.io.IOException

Deprecated. Use ByteSink.write(byte[]) instead. This method is scheduled for removal in Guava 18.0.

Writes a byte array to an output stream from the given supplier.

Parameters:

from - the bytes to write

to - the output supplier

Throws:

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

copy

@Deprecated
public static long copy(InputSupplier<? extends java.io.InputStream> from,
                   OutputSupplier<? extends java.io.OutputStream> to)
                 throws java.io.IOException

Deprecated. Use ByteSource.copyTo(ByteSink) instead. This method is scheduled for removal in Guava 18.0.

Opens input and output streams from the given suppliers, copies all bytes from the input to the output, and closes the streams.

Parameters:

from - the input factory

to - the output factory

Returns:

the number of bytes copied

Throws:

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

copy

@Deprecated
public static long copy(InputSupplier<? extends java.io.InputStream> from,
                   java.io.OutputStream to)
                 throws java.io.IOException

Deprecated. Use ByteSource.copyTo(OutputStream) instead. This method is scheduled for removal in Guava 18.0.

Opens an input stream from the supplier, copies all bytes from the input to the output, and closes the input stream. Does not close or flush the output stream.

Parameters:

from - the input factory

to - the output stream to write to

Returns:

the number of bytes copied

Throws:

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

copy

@Deprecated
public static long copy(java.io.InputStream from,
                   OutputSupplier<? extends java.io.OutputStream> to)
                 throws java.io.IOException

Deprecated. Use ByteSink.writeFrom(InputStream) instead. This method is scheduled for removal in Guava 18.0.

Opens an output stream from the supplier, copies all bytes from the input to the output, and closes the output stream. Does not close or flush the input stream.

Parameters:

from - the input stream to read from

to - the output factory

Returns:

the number of bytes copied

Throws:

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

Since:

10.0

copy

public static long copy(java.io.InputStream from,
        java.io.OutputStream to)
                 throws java.io.IOException

Copies all bytes from the input stream to the output stream. Does not close or flush either stream.

Parameters:

from - the input stream to read from

to - the output stream to write to

Returns:

the number of bytes copied

Throws:

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

copy

public static long copy(java.nio.channels.ReadableByteChannel from,
        java.nio.channels.WritableByteChannel to)
                 throws java.io.IOException

Copies all bytes from the readable channel to the writable channel. Does not close or flush either channel.

Parameters:

from - the readable channel to read from

to - the writable channel to write to

Returns:

the number of bytes copied

Throws:

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

toByteArray

public static byte[] toByteArray(java.io.InputStream in)
                          throws java.io.IOException

Reads all bytes from an input stream into a byte array. Does not close the stream.

Parameters:

in - the input stream to read from

Returns:

a byte array containing all the bytes from the stream

Throws:

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

toByteArray

@Deprecated
public static byte[] toByteArray(InputSupplier<? extends java.io.InputStream> supplier)
                          throws java.io.IOException

Deprecated. Use ByteSource.read() instead. This method is scheduled for removal in Guava 18.0.

Returns the data from a InputStream factory as a byte array.

Parameters:

supplier - the factory

Throws:

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

newDataInput

public static ByteArrayDataInput newDataInput(byte[] bytes)

Returns a new ByteArrayDataInput instance to read from the bytes array from the beginning.

newDataInput

public static ByteArrayDataInput newDataInput(byte[] bytes,
                              int start)

Returns a new ByteArrayDataInput instance to read from the bytes array, starting at the given position.

Throws:

java.lang.IndexOutOfBoundsException - if start is negative or greater than the length of the array

newDataOutput

public static ByteArrayDataOutput newDataOutput()

Returns a new ByteArrayDataOutput instance with a default size.

newDataOutput

public static ByteArrayDataOutput newDataOutput(int size)

Returns a new ByteArrayDataOutput instance sized to hold size bytes before resizing.

Throws:

java.lang.IllegalArgumentException - if size is negative

nullOutputStream

public static java.io.OutputStream nullOutputStream()

Returns an OutputStream that simply discards written bytes.

Since:

14.0 (since 1.0 as net.tribe7.common.io.NullOutputStream)

limit

public static java.io.InputStream limit(java.io.InputStream in,
                        long limit)

Wraps a InputStream, limiting the number of bytes which can be read.

Parameters:

in - the input stream to be wrapped

limit - the maximum number of bytes to be read

Returns:

a length-limited InputStream

Since:

14.0 (since 1.0 as net.tribe7.common.io.LimitInputStream)

length

@Deprecated
public static long length(InputSupplier<? extends java.io.InputStream> supplier)
                   throws java.io.IOException

Deprecated. Use ByteSource.size() instead. This method is scheduled for removal in Guava 18.0.

Returns the length of a supplied input stream, in bytes.

Throws:

java.io.IOException

equal

@Deprecated
public static boolean equal(InputSupplier<? extends java.io.InputStream> supplier1,
                       InputSupplier<? extends java.io.InputStream> supplier2)
                     throws java.io.IOException

Deprecated. Use ByteSource.contentEquals(ByteSource) instead. This method is scheduled for removal in Guava 18.0.

Returns true if the supplied input streams contain the same bytes.

Throws:

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

readFully

public static void readFully(java.io.InputStream in,
             byte[] b)
                      throws java.io.IOException

Attempts to read enough bytes from the stream to fill the given byte array, with the same behavior as DataInput.readFully(byte[]). Does not close the stream.

Parameters:

in - the input stream to read from.

b - the buffer into which the data is read.

Throws:

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

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

readFully

public static void readFully(java.io.InputStream in,
             byte[] b,
             int off,
             int len)
                      throws java.io.IOException

Attempts to read len bytes from the stream into the given array starting at off, with the same behavior as DataInput.readFully(byte[], int, int). Does not close the stream.

Parameters:

in - the input stream to read from.

b - the buffer into which the data is read.

off - an int specifying the offset into the data.

len - an int specifying the number of bytes to read.

Throws:

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

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

skipFully

public static void skipFully(java.io.InputStream in,
             long n)
                      throws java.io.IOException

Discards n bytes of data from the input stream. This method will block until the full amount has been skipped. Does not close the stream.

Parameters:

in - the input stream to read from

n - the number of bytes to skip

Throws:

java.io.EOFException - if this stream reaches the end before skipping all the bytes

java.io.IOException - if an I/O error occurs, or the stream does not support skipping

readBytes

@Deprecated
public static <T> T readBytes(InputSupplier<? extends java.io.InputStream> supplier,
                         ByteProcessor<T> processor)
                   throws java.io.IOException

Deprecated. Use ByteSource.read(ByteProcessor) instead. This method is scheduled for removal in Guava 18.0.

Process the bytes of a supplied stream

Parameters:

supplier - the input stream factory

processor - the object to which to pass the bytes of the stream

Returns:

the result of the byte processor

Throws:

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

readBytes

public static <T> T readBytes(java.io.InputStream input,
              ByteProcessor<T> processor)
                   throws java.io.IOException

Process the bytes of the given input stream using the given processor.

Parameters:

input - the input stream to process

processor - the object to which to pass the bytes of the stream

Returns:

the result of the byte processor

Throws:

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

Since:

14.0

hash

@Deprecated
public static net.tribe7.common.hash.HashCode hash(InputSupplier<? extends java.io.InputStream> supplier,
                                              net.tribe7.common.hash.HashFunction hashFunction)
                                            throws java.io.IOException

Deprecated. Use ByteSource.hash(HashFunction) instead. This method is scheduled for removal in Guava 18.0.

Computes the hash code of the data supplied by supplier using hashFunction.

Parameters:

supplier - the input stream factory

hashFunction - the hash function to use to hash the data

Returns:

the HashCode of all of the bytes in the input stream

Throws:

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

Since:

12.0

read

public static int read(java.io.InputStream in,
       byte[] b,
       int off,
       int len)
                throws java.io.IOException

Reads some bytes from an input stream and stores them into the buffer array b. This method blocks until len bytes of input data have been read into the array, or end of file is detected. The number of bytes read is returned, possibly zero. Does not close the stream.

A caller can detect EOF if the number of bytes read is less than len. All subsequent calls on the same stream will return zero.

If b is null, a NullPointerException is thrown. If off is negative, or len is negative, or off+len is greater than the length of the array b, then an IndexOutOfBoundsException is thrown. If len is zero, then no bytes are read. Otherwise, the first byte read is stored into element b[off], the next one into b[off+1], and so on. The number of bytes read is, at most, equal to len.

Parameters:

in - the input stream to read from

b - the buffer into which the data is read

off - an int specifying the offset into the data

len - an int specifying the number of bytes to read

Returns:

the number of bytes read

Throws:

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

slice

@Deprecated
public static InputSupplier<java.io.InputStream> slice(InputSupplier<? extends java.io.InputStream> supplier,
                                                  long offset,
                                                  long length)

Deprecated. Use ByteSource#slice(int, int) instead. This method is scheduled for removal in Guava 18.0.

Returns an InputSupplier that returns input streams from the an underlying supplier, where each stream starts at the given offset and is limited to the specified number of bytes.

Parameters:

supplier - the supplier from which to get the raw streams

offset - the offset in bytes into the underlying stream where the returned streams will start

length - the maximum length of the returned streams

Throws:

java.lang.IllegalArgumentException - if offset or length are negative

join

@Deprecated
public static InputSupplier<java.io.InputStream> join(java.lang.Iterable<? extends InputSupplier<? extends java.io.InputStream>> suppliers)

Deprecated. Use ByteSource.concat(Iterable) instead. This method is scheduled for removal in Guava 18.0.

Joins multiple InputStream suppliers into a single supplier. Streams returned from the supplier will contain the concatenated data from the streams of the underlying suppliers.

Only one underlying input stream will be open at a time. Closing the joined stream will close the open underlying stream.

Reading from the joined stream will throw a NullPointerException if any of the suppliers are null or return null.

Parameters:

suppliers - the suppliers to concatenate

Returns:

a supplier that will return a stream containing the concatenated stream data

join

@Deprecated
public static InputSupplier<java.io.InputStream> join(InputSupplier<? extends java.io.InputStream>... suppliers)

Deprecated. Use ByteSource.concat(ByteSource[]) instead. This method is scheduled for removal in Guava 18.0.

Varargs form of join(Iterable).

asByteSource

@Deprecated
public static ByteSource asByteSource(InputSupplier<? extends java.io.InputStream> supplier)

Deprecated. Convert all InputSupplier<? extends InputStream> implementations to extend ByteSource or provide a method for viewing the object as a ByteSource. This method is scheduled for removal in Guava 18.0.

Returns a view of the given InputStream supplier as a ByteSource.

This method is a temporary method provided for easing migration from suppliers to sources and sinks.

Since:

15.0

asByteSink

@Deprecated
public static ByteSink asByteSink(OutputSupplier<? extends java.io.OutputStream> supplier)

Deprecated. Convert all OutputSupplier<? extends OutputStream> implementations to extend ByteSink or provide a method for viewing the object as a ByteSink. This method is scheduled for removal in Guava 18.0.

Returns a view of the given OutputStream supplier as a ByteSink.

This method is a temporary method provided for easing migration from suppliers to sources and sinks.

Since:

15.0