Package jmri.jmrix.loconet.spjfile

Class SpjFile

java.lang.Object

jmri.jmrix.loconet.spjfile.SpjFile

public class SpjFile
extends Object

Provide tools for reading, writing and accessing Digitrax SPJ files.

Four-byte quantities in SPJ files are little-endian.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) class	SpjFile.FirstHeader	Class representing first header
class	SpjFile.Header	Class representing a header record.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) File	file
(package private) SpjFile.FirstHeader	h0
(package private) SpjFile.Header[]	headers
(package private) String[]	mapCache

Constructor Summary

Constructors

Constructor	Description
SpjFile(File file)

Method Summary

Modifier and Type	Method	Description
void	dispose()
SpjFile.Header	findSdfHeader()
String	getComment()
SpjFile.Header	getHeader(int index)
String	getMapEntry(int i)	Find the map entry (character string) that corresponds to a particular handle number.
(package private) void	loadMapCache()
int	numHeaders()	Number of headers present in the file.
void	read()	Read the file whose name was provided earlier.
void	save(String name)	Save this file.
(package private) void	writeSubFile(int i, String name)	Write the content from a specific header as a new "subfile".
void	writeSubFiles()	Write data from headers into separate files.

Methods inherited from class java.lang.Object

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

Field Details

mapCache

String[] mapCache

file

File file

h0

SpjFile.FirstHeader h0

headers

SpjFile.Header[] headers

Constructor Details

SpjFile

public SpjFile(File file)

Method Details

numHeaders

public int numHeaders()

Number of headers present in the file.

Returns:

-1 if error

getComment

public String getComment()

getHeader

public SpjFile.Header getHeader(int index)

findSdfHeader

public SpjFile.Header findSdfHeader()

getMapEntry

public String getMapEntry(int i)

Find the map entry (character string) that corresponds to a particular handle number.

Parameters:

i - handle index.

Returns:

string of map entry.

loadMapCache

void loadMapCache()

save

public void save(String name)
          throws IOException

Save this file.

It lays the file out again, changing the record start addresses into a sequential series.

Parameters:

name - file name.

Throws:

IOException - if anything goes wrong

read

public void read()
          throws IOException

Read the file whose name was provided earlier.

Throws:

IOException - on file error.

writeSubFiles

public void writeSubFiles()
                   throws IOException

Write data from headers into separate files.

Normally, we just work with the data within this file. This method allows us to extract the contents of the file for external use.

Throws:

IOException - on file error.

writeSubFile

void writeSubFile(int i,
 String name)
           throws IOException

Write the content from a specific header as a new "subfile".

Parameters:

i - index of the specific header

name - filename

Throws:

IOException - based on underlying activity

dispose

public void dispose()