ej.event

Class EventQueueDataReader

java.lang.Object

ej.event.EventQueueDataReader

All Implemented Interfaces:

EventDataReader

public class EventQueueDataReader
extends Object
implements EventDataReader

EventQueueDataReader is an implementation of the EventDataReader interface.

Constructor Summary

Constructors

Constructor and Description
EventQueueDataReader()

Method Summary

Modifier and Type	Method and Description
int	available() Returns the number of bytes that can be read (or skipped over).
int	read(byte[] b, int off, int len) Reads len bytes of data and store them into the buffer b.
boolean	readBoolean() Reads the next boolean of data.
byte	readByte() Reads the next byte of data.
char	readChar() Reads the next char of data.
double	readDouble() Reads the next double of data.
float	readFloat() Reads the next float of data.
int	readFully(byte[] b) Reads all the bytes of data and store them into the buffer b.
int	readInt() Reads the next integer of data.
long	readLong() Reads the next long of data.
short	readShort() Reads the next short of data.
int	readUnsignedByte() Reads the next unsigned byte of data.
int	readUnsignedShort() Reads the next unsigned short of data.
int	skipBytes(int n) Skips over and discard n bytes of data.

Methods inherited from class java.lang.Object

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

Constructor Detail

EventQueueDataReader

public EventQueueDataReader()

Method Detail

available

public int available()

Description copied from interface: EventDataReader

Returns the number of bytes that can be read (or skipped over).

Specified by:

available in interface EventDataReader

Returns:

the number of available data bytes.

read

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

Description copied from interface: EventDataReader

Reads len bytes of data and store them into the buffer b.

Specified by:

read in interface EventDataReader

Parameters:

b - the buffer into which the data is read.

off - the start offset in the buffer b at which the data is written.

len - the number of bytes to read.

Returns:

the total number of bytes read into the buffer.

Throws:

IOException - if there are not enough bytes remaining in the data of the extended event or if the buffer is too small to store the event data.

readBoolean

public boolean readBoolean()
                    throws IOException

Description copied from interface: EventDataReader

Reads the next boolean of data.

Specified by:

readBoolean in interface EventDataReader

Returns:

the next boolean of data.

Throws:

IOException - if there is no boolean remaining in the data of the extended event.

readByte

public byte readByte()
              throws IOException

Description copied from interface: EventDataReader

Reads the next byte of data.

Specified by:

readByte in interface EventDataReader

Returns:

the next byte of data.

Throws:

IOException - if there is no byte remaining in the data of the extended event.

readChar

public char readChar()
              throws IOException

Description copied from interface: EventDataReader

Reads the next char of data.

Specified by:

readChar in interface EventDataReader

Returns:

the next char of data.

Throws:

IOException - if there is no char remaining in the data of the extended event.

readDouble

public double readDouble()
                  throws IOException

Description copied from interface: EventDataReader

Reads the next double of data.

Specified by:

readDouble in interface EventDataReader

Returns:

the next double of data.

Throws:

IOException - if there is no double remaining in the data of the extended event.

readFloat

public float readFloat()
                throws IOException

Description copied from interface: EventDataReader

Reads the next float of data.

Specified by:

readFloat in interface EventDataReader

Returns:

the next float of data.

Throws:

IOException - if there is no float remaining in the data of the extended event.

readFully

public int readFully(byte[] b)
              throws IOException

Description copied from interface: EventDataReader

Reads all the bytes of data and store them into the buffer b.

Specified by:

readFully in interface EventDataReader

Parameters:

b - the buffer into which the data is read.

Returns:

the total number of bytes read into the buffer.

Throws:

IOException - if there is no byte remaining in the data of the extended event or if the buffer is too small to store the event data.

readInt

public int readInt()
            throws IOException

Description copied from interface: EventDataReader

Reads the next integer of data.

Specified by:

readInt in interface EventDataReader

Returns:

the next integer of data.

Throws:

IOException - if there is no integer remaining in the data of the extended event.

readLong

public long readLong()
              throws IOException

Description copied from interface: EventDataReader

Reads the next long of data.

Specified by:

readLong in interface EventDataReader

Returns:

the next long of data.

Throws:

IOException - if there is no long remaining in the data of the extended event.

readShort

public short readShort()
                throws IOException

Description copied from interface: EventDataReader

Reads the next short of data.

Specified by:

readShort in interface EventDataReader

Returns:

the next short of data.

Throws:

IOException - if there is no short remaining in the data of the extended event.

readUnsignedByte

public int readUnsignedByte()
                     throws IOException

Description copied from interface: EventDataReader

Reads the next unsigned byte of data.

Specified by:

readUnsignedByte in interface EventDataReader

Returns:

the next unsigned byte of data.

Throws:

IOException - if there is no unsigned byte remaining in the data of the extended event.

readUnsignedShort

public int readUnsignedShort()
                      throws IOException

Description copied from interface: EventDataReader

Reads the next unsigned short of data.

Specified by:

readUnsignedShort in interface EventDataReader

Returns:

the next unsigned short of data.

Throws:

IOException - if there is no unsigned short remaining in the data of the extended event.

skipBytes

public int skipBytes(int n)

Description copied from interface: EventDataReader

Skips over and discard n bytes of data.

Specified by:

skipBytes in interface EventDataReader

Parameters:

n - the number of bytes to skip.

Returns:

0 if OK and -1 if an error occurs.