waba.io
Class ResizeStream

java.lang.Object
  |
  +--waba.io.Stream
        |
        +--waba.io.ResizeStream

public class ResizeStream

extends Stream

this class is used to create an resizable record. you can use it with DataStream. example:

Catalog cat = new Catalog(type+"."+creator+"."+type,Catalog.READ_WRITE);
ResizeStream rs = new ResizeStream(cat,512);
DataStream ds = new DataStream(rs);
rs.startRecord();
ds.writeStringArray(aStringArray);
rs.endRecord();
ds.close();

ps: if you dont call startRecord, writeBytes will simply call catalog.writeBytes and will not resize the record.

Constructor Summary

ResizeStream(Catalog cat, int initialSize)
constructs the resize stream.

Method Summary

boolean	close() closes the catalog
void	endRecord() must be called after the record is finished so it can be resized
boolean	isOpen() Returns true if this Stream is open and false otherwise
int	readBytes(byte[] buf, int start, int count) simply read the bytes from the associated catalog
boolean	restartRecord(int pos) Restart writing to the given record pos.
boolean	startRecord() add a new record to the catalog.
boolean	startRecord(int pos) inserts the record at the specified index in the catalog.
int	writeBytes(byte[] buf, int start, int count) writes to the buffer, growing the record if necessary.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, toString, wait, wait

Constructor Detail

ResizeStream

public ResizeStream(Catalog cat,
                    int initialSize)

constructs the resize stream.

Parameters:

cat - the catalog associated

initialSize - the initial size of the record. CANNOT BE 0!

Method Detail

startRecord

public boolean startRecord(int pos)

inserts the record at the specified index in the catalog.

Returns:

true if operation was successful, false otherwise.

Since:

SuperWaba 1.21.

startRecord

public boolean startRecord()

add a new record to the catalog.

Returns:

true if operation was successful, false otherwise.

restartRecord

public boolean restartRecord(int pos)

Restart writing to the given record pos. If pos is < 0 or greater than the number of records of the Catalog, the record is appended.

endRecord

public void endRecord()

must be called after the record is finished so it can be resized

readBytes

public int readBytes(byte[] buf,
                     int start,
                     int count)

simply read the bytes from the associated catalog

Overrides:

readBytes in class Stream

Tags copied from class: Stream

Parameters:

buf - the byte array to read data into

start - the start position in the array

count - the number of bytes to read

writeBytes

public int writeBytes(byte[] buf,
                      int start,
                      int count)

writes to the buffer, growing the record if necessary.

Overrides:

writeBytes in class Stream

Tags copied from class: Stream

Parameters:

buf - the byte array to write data from

start - the start position in the byte array

count - the number of bytes to write

close

public boolean close()

closes the catalog

Overrides:

close in class Stream

isOpen

public boolean isOpen()

Description copied from class: Stream

Returns true if this Stream is open and false otherwise

Overrides:

isOpen in class Stream