Package org.apache.parquet.bytes

Class LittleEndianDataInputStream

java.lang.Object

java.io.InputStream

org.apache.parquet.bytes.LittleEndianDataInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public final class LittleEndianDataInputStream
extends InputStream

Based on DataInputStream but little endian and without the String/char methods

Constructor Summary

Constructors

Constructor	Description
LittleEndianDataInputStream(InputStream in)	Creates a LittleEndianDataInputStream that uses the specified underlying InputStream.

Method Summary

Modifier and Type	Method	Description
int	available()
void	close()
boolean	equals(Object obj)
int	hashCode()
void	mark(int readlimit)
boolean	markSupported()
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
boolean	readBoolean()	See the general contract of the readBoolean method of DataInput.
byte	readByte()	See the general contract of the readByte method of DataInput.
double	readDouble()	Bytes for this operation are read from the contained input stream.
float	readFloat()	Bytes for this operation are read from the contained input stream.
void	readFully(byte[] b)	See the general contract of the readFully method of DataInput.
void	readFully(byte[] b, int off, int len)	See the general contract of the readFully method of DataInput.
int	readInt()	Bytes for this operation are read from the contained input stream.
long	readLong()	Bytes for this operation are read from the contained input stream.
short	readShort()	Bytes for this operation are read from the contained input stream.
int	readUnsignedByte()	See the general contract of the readUnsignedByte method of DataInput.
int	readUnsignedShort()	Bytes for this operation are read from the contained input stream.
void	reset()
long	skip(long n)
int	skipBytes(int n)	See the general contract of the skipBytes method of DataInput.

Methods inherited from class java.io.InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, transferTo

Methods inherited from class java.lang.Object

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

Constructor Detail

LittleEndianDataInputStream

public LittleEndianDataInputStream(InputStream in)

Creates a LittleEndianDataInputStream that uses the specified underlying InputStream.

Parameters:

in - the specified input stream

Method Detail

readFully

public final void readFully(byte[] b)
                     throws IOException

See the general contract of the readFully method of DataInput.

Bytes for this operation are read from the contained input stream.

Parameters:

b - the buffer into which the data is read.

Throws:

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

IOException - the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs.

See Also:

FilterInputStream.in

readFully

public final void readFully(byte[] b,
                            int off,
                            int len)
                     throws IOException

See the general contract of the readFully method of DataInput.

Bytes for this operation are read from the contained input stream.

Parameters:

b - the buffer into which the data is read.

off - the start offset of the data.

len - the number of bytes to read.

Throws:

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

IOException - the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs.

See Also:

FilterInputStream.in

skipBytes

public final int skipBytes(int n)
                    throws IOException

See the general contract of the skipBytes method of DataInput.

Bytes for this operation are read from the contained input stream.

Parameters:

n - the number of bytes to be skipped.

Returns:

the actual number of bytes skipped.

Throws:

IOException - if the contained input stream does not support seek, or the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs.

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Returns:

the next byte in the stream as an int

Throws:

IOException - if there is an exception while reading

See Also:

InputStream.read()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

Returns:

the hash code of the wrapped input stream

See Also:

Object.hashCode()

read

public int read(byte[] b)
         throws IOException

Overrides:

read in class InputStream

Parameters:

b - a byte array

Returns:

the number of bytes read

Throws:

IOException - if there was an exception while reading

See Also:

InputStream.read(byte[])

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

Parameters:

obj - another object

Returns:

true if this is equal to the object

See Also:

Object.equals(java.lang.Object)

read

public int read(byte[] b,
                int off,
                int len)
         throws IOException

Overrides:

read in class InputStream

Parameters:

b - a byte array

off - an offset into the byte array

len - the length to read

Returns:

the number of bytes read

Throws:

IOException - if there was an exception while reading

See Also:

InputStream.read(byte[], int, int)

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class InputStream

Parameters:

n - the number of bytes to skip

Returns:

the number of bytes skipped

Throws:

IOException - if there was an exception while reading

See Also:

InputStream.skip(long)

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Returns:

the number of bytes available in the wrapped stream

Throws:

IOException - if there was an exception while getting the number of available bytes

See Also:

InputStream.available()

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException - if there was an exception while closing the underlying stream

See Also:

InputStream.close()

mark

public void mark(int readlimit)

Overrides:

mark in class InputStream

Parameters:

readlimit - the number of bytes the mark will be valid for

See Also:

InputStream.mark(int)

reset

public void reset()
           throws IOException

Overrides:

reset in class InputStream

Throws:

IOException - if there is an exception while resetting the underlying stream

See Also:

InputStream.reset()

markSupported

public boolean markSupported()

Overrides:

markSupported in class InputStream

Returns:

true if mark is supported

See Also:

InputStream.markSupported()

readBoolean

public final boolean readBoolean()
                          throws IOException

See the general contract of the readBoolean method of DataInput.

Bytes for this operation are read from the contained input stream.

Returns:

the boolean value read.

Throws:

EOFException - if this input stream has reached the end.

IOException - the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs.

See Also:

FilterInputStream.in

readByte

public final byte readByte()
                    throws IOException

See the general contract of the readByte method of DataInput.

Bytes for this operation are read from the contained input stream.

Returns:

the next byte of this input stream as a signed 8-bit byte.

Throws:

EOFException - if this input stream has reached the end.

IOException - the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs.

See Also:

FilterInputStream.in

readUnsignedByte

public final int readUnsignedByte()
                           throws IOException

See the general contract of the readUnsignedByte method of DataInput.

Bytes for this operation are read from the contained input stream.

Returns:

the next byte of this input stream, interpreted as an unsigned 8-bit number.

Throws:

EOFException - if this input stream has reached the end.

IOException - the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs.

See Also:

FilterInputStream.in

readShort

public final short readShort()
                      throws IOException

Bytes for this operation are read from the contained input stream.

Returns:

the next two bytes of this input stream, interpreted as a signed 16-bit number.

Throws:

EOFException - if this input stream reaches the end before reading two bytes.

IOException - the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs.

See Also:

FilterInputStream.in

readUnsignedShort

public final int readUnsignedShort()
                            throws IOException

Bytes for this operation are read from the contained input stream.

Returns:

the next two bytes of this input stream, interpreted as an unsigned 16-bit integer.

Throws:

EOFException - if this input stream reaches the end before reading two bytes.

IOException - the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs.

See Also:

FilterInputStream.in

readInt

public final int readInt()
                  throws IOException

Bytes for this operation are read from the contained input stream.

Returns:

the next four bytes of this input stream, interpreted as an int.

Throws:

EOFException - if this input stream reaches the end before reading four bytes.

IOException - the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs.

See Also:

FilterInputStream.in

readLong

public final long readLong()
                    throws IOException

Bytes for this operation are read from the contained input stream.

Returns:

the next eight bytes of this input stream, interpreted as a long.

Throws:

EOFException - if this input stream reaches the end before reading eight bytes.

IOException - the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs.

See Also:

FilterInputStream.in

readFloat

public final float readFloat()
                      throws IOException

Bytes for this operation are read from the contained input stream.

Returns:

the next four bytes of this input stream, interpreted as a float.

Throws:

EOFException - if this input stream reaches the end before reading four bytes.

IOException - the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs.

See Also:

Float.intBitsToFloat(int)

readDouble

public final double readDouble()
                        throws IOException

Bytes for this operation are read from the contained input stream.

Returns:

the next eight bytes of this input stream, interpreted as a double.

Throws:

EOFException - if this input stream reaches the end before reading eight bytes.

IOException - the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs.

See Also:

Double.longBitsToDouble(long)