org.crosswire.jsword.book.sword
Class RawBackend

java.lang.Object
  extended by org.crosswire.jsword.book.sword.AbstractBackend
      extended by org.crosswire.jsword.book.sword.RawBackend
All Implemented Interfaces:
Activatable
Direct Known Subclasses:
RawFileBackend

public class RawBackend
extends AbstractBackend

Both Books and Commentaries seem to use the same format so this class abstracts out the similarities.

Author:
Joe Walker [joe at eireneh dot com]
See Also:
for license details.
The copyright to this program is held by it's authors.

Field Summary
protected  boolean active
          Are we active
protected  int datasize
          How many bytes in the size count in the index
protected  int entrysize
          The number of bytes for each entry in the index: either 6 or 8
private static Logger log
          The log stream
protected  File ntIdxFile
           
protected  RandomAccessFile ntIdxRaf
           
protected  File ntTxtFile
           
protected  RandomAccessFile ntTxtRaf
           
protected static int OFFSETSIZE
          How many bytes in the offset pointers in the index
protected  File otIdxFile
           
protected  RandomAccessFile otIdxRaf
           
protected  File otTxtFile
           
protected  RandomAccessFile otTxtRaf
           
 
Constructor Summary
RawBackend(SwordBookMetaData sbmd, int datasize)
          Simple ctor
 
Method Summary
 void activate(Lock lock)
          Called to indicate that the Book should initialize itself, and consume whatever system resources it needs to be able to respond to other queries.
protected  void checkActive()
          Helper method so we can quickly activate ourselves on access
 boolean contains(Key key)
          Determine whether this Book contains the key in question
 void deactivate(Lock lock)
          Called to indicate that the Book should release whatever system resources it can to make way for other uses.
protected  String getEntry(String name, Testament testament, long index)
          Get the text for an indexed entry in the book.
protected  DataIndex getIndex(RandomAccessFile raf, long entry)
          Get the Index (that is offset and size) for an entry.
 String getRawText(Key key)
          Get the text allotted for the given entry
 boolean isWritable()
          A Backend is writable if the file system allows the underlying files to be opened for writing and if the backend has implemented writing.
 void setAliasKey(Key alias, Key source)
          Sets alias for a comment on a verse range I.e.
 void setRawText(Key key, String text)
          Set the text allotted for the given verse
 
Methods inherited from class org.crosswire.jsword.book.sword.AbstractBackend
create, decipher, encipher, getBookMetaData, getExpandedDataPath, isSupported, readIndex
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

active

protected boolean active
Are we active


datasize

protected int datasize
How many bytes in the size count in the index


entrysize

protected int entrysize
The number of bytes for each entry in the index: either 6 or 8


otIdxRaf

protected RandomAccessFile otIdxRaf

otTxtRaf

protected RandomAccessFile otTxtRaf

otIdxFile

protected File otIdxFile

otTxtFile

protected File otTxtFile

ntIdxRaf

protected RandomAccessFile ntIdxRaf

ntTxtRaf

protected RandomAccessFile ntTxtRaf

ntIdxFile

protected File ntIdxFile

ntTxtFile

protected File ntTxtFile

OFFSETSIZE

protected static final int OFFSETSIZE
How many bytes in the offset pointers in the index

See Also:
Constant Field Values

log

private static final Logger log
The log stream

Constructor Detail

RawBackend

public RawBackend(SwordBookMetaData sbmd,
                  int datasize)
Simple ctor

Method Detail

contains

public boolean contains(Key key)
Description copied from class: AbstractBackend
Determine whether this Book contains the key in question

Specified by:
contains in class AbstractBackend
Parameters:
key - The key whose presence is desired.
Returns:
true if the Book contains the key

getRawText

public String getRawText(Key key)
                  throws BookException
Description copied from class: AbstractBackend
Get the text allotted for the given entry

Specified by:
getRawText in class AbstractBackend
Parameters:
key - The key to fetch
Returns:
String The data for the verse in question
Throws:
BookException - If the data can not be read.

setRawText

public void setRawText(Key key,
                       String text)
                throws BookException,
                       IOException
Description copied from class: AbstractBackend
Set the text allotted for the given verse

Specified by:
setRawText in class AbstractBackend
Parameters:
key - The key to set text to
text - The text to be set for key
Throws:
BookException - If the data can not be set.
IOException - If the module data path could not be created.

isWritable

public boolean isWritable()
Description copied from class: AbstractBackend
A Backend is writable if the file system allows the underlying files to be opened for writing and if the backend has implemented writing. Ultimately, all drivers should allow writing. At this time writing is not supported by backends, so abstract implementations should return false and let specific implementations return true otherwise.

Overrides:
isWritable in class AbstractBackend
Returns:
true if the book is writable

setAliasKey

public void setAliasKey(Key alias,
                        Key source)
                 throws IOException
Description copied from class: AbstractBackend
Sets alias for a comment on a verse range I.e. setRawText() was for verse range Gen.1.1-3 then setAliasKey should be called for Gen.1.1.2 and Gen.1.1.3

Specified by:
setAliasKey in class AbstractBackend
Parameters:
alias - Alias Key
source - Source Key
Throws:
IOException - Exception when anything goes wrong on writing the alias

activate

public final void activate(Lock lock)
Description copied from interface: Activatable
Called to indicate that the Book should initialize itself, and consume whatever system resources it needs to be able to respond to other queries.

Parameters:
lock - An attempt to ensure that only the Activator calls this method

deactivate

public final void deactivate(Lock lock)
Description copied from interface: Activatable
Called to indicate that the Book should release whatever system resources it can to make way for other uses.

Parameters:
lock - An attempt to ensure that only the Activator calls this method

checkActive

protected final void checkActive()
Helper method so we can quickly activate ourselves on access


getIndex

protected DataIndex getIndex(RandomAccessFile raf,
                             long entry)
                      throws IOException
Get the Index (that is offset and size) for an entry.

Parameters:
entry -
Returns:
the index for the entry
Throws:
IOException

getEntry

protected String getEntry(String name,
                          Testament testament,
                          long index)
                   throws IOException
Get the text for an indexed entry in the book.

Parameters:
index - the entry to get
name - name of the entry
testament - the testament for the entry
Returns:
the text for the entry.
Throws:
IOException - on a IO problem

Copyright ? 2003-2011