org.apache.cassandra.utils.vint

Class EncodedDataInputStream

java.lang.Object

java.io.InputStream

org.apache.cassandra.io.util.AbstractDataInput

org.apache.cassandra.utils.vint.EncodedDataInputStream

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput, java.lang.AutoCloseable

public class EncodedDataInputStream
extends AbstractDataInput

Borrows idea from https://developers.google.com/protocol-buffers/docs/encoding#varints Should be used with EncodedDataOutputStream

Constructor Summary

Constructors

Constructor and Description
EncodedDataInputStream(java.io.DataInput input)

Method Summary

Modifier and Type	Method and Description
protected int	getPosition()
int	read()
int	readInt() Reads a 32-bit integer from the current position in this file.
long	readLong() Reads a 64-bit long from the current position in this file.
short	readShort() Reads a 16-bit short from the current position in this file.
int	readUnsignedShort() Reads an unsigned 16-bit short from the current position in this file and returns it as an integer.
protected void	seekInternal(int position)
int	skipBytes(int n)

Methods inherited from class org.apache.cassandra.io.util.AbstractDataInput

readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readLine, readUnsignedByte, readUTF

Methods inherited from class java.io.InputStream

available, close, mark, markSupported, read, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

EncodedDataInputStream

public EncodedDataInputStream(java.io.DataInput input)

Method Detail

skipBytes

public int skipBytes(int n)
              throws java.io.IOException

Throws:

java.io.IOException

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

seekInternal

protected void seekInternal(int position)

Specified by:

seekInternal in class AbstractDataInput

getPosition

protected int getPosition()

Specified by:

getPosition in class AbstractDataInput

readInt

public int readInt()
            throws java.io.IOException

Description copied from class: AbstractDataInput

Reads a 32-bit integer from the current position in this file. Blocks until four bytes have been read, the end of the file is reached or an exception is thrown.

Specified by:

readInt in interface java.io.DataInput

Overrides:

readInt in class AbstractDataInput

Returns:

the next int value from this file.

Throws:

java.io.EOFException - if the end of this file is detected.

java.io.IOException - if this file is closed or another I/O error occurs.

readLong

public long readLong()
              throws java.io.IOException

Description copied from class: AbstractDataInput

Reads a 64-bit long from the current position in this file. Blocks until eight bytes have been read, the end of the file is reached or an exception is thrown.

Specified by:

readLong in interface java.io.DataInput

Overrides:

readLong in class AbstractDataInput

Returns:

the next long value from this file.

Throws:

java.io.EOFException - if the end of this file is detected.

java.io.IOException - if this file is closed or another I/O error occurs.

readUnsignedShort

public int readUnsignedShort()
                      throws java.io.IOException

Description copied from class: AbstractDataInput

Reads an unsigned 16-bit short from the current position in this file and returns it as an integer. Blocks until two bytes have been read, the end of the file is reached or an exception is thrown.

Specified by:

readUnsignedShort in interface java.io.DataInput

Overrides:

readUnsignedShort in class AbstractDataInput

Returns:

the next unsigned short value from this file as an int.

Throws:

java.io.EOFException - if the end of this file is detected.

java.io.IOException - if this file is closed or another I/O error occurs.

readShort

public short readShort()
                throws java.io.IOException

Description copied from class: AbstractDataInput

Reads a 16-bit short from the current position in this file. Blocks until two bytes have been read, the end of the file is reached or an exception is thrown.

Specified by:

readShort in interface java.io.DataInput

Overrides:

readShort in class AbstractDataInput

Returns:

the next short value from this file.

Throws:

java.io.EOFException - if the end of this file is detected.

java.io.IOException - if this file is closed or another I/O error occurs.