Lttoolbox-java

What is lttoolbox

lttoolbox are 1) making binary files out of the .dix files (lt-comp), 2) analysing or generating text (lt-proc) and 3) expanding a .dix file (lt-expand).

Usage

$ java -jar dist/lttoolbox.jar
lttoolbox: is a toolbox for lexical processing, morphological analysis and generation of words
USAGE: java -jar dist/lttoolbox.jar [task]
Examples:
 java -jar dist/lttoolbox.jar lt-expand dictionary.dix     expands a dictionary
 java -jar dist/lttoolbox.jar lt-comp lr dic.dix dic.bin   compiles a dictionary
 java -jar dist/lttoolbox.jar lt-proc dic.bin              morphological analysis

Examples

Use the new compounding feature:

echo "lambakjöti" | java -jar dist/lttoolbox.jar lt-proc -e /home/j/esperanto/apertium/apertium-is-en/is.bin

^lambakjöti/lamb<n><nt><pl><gen><ind>+kjöt<n><nt><sg><dat><ind>$

Encoding problems

Try -Dfile.encoding=UTF-8, like

echo "lambakjöti" | java -Dfile.encoding=UTF-8 -jar dist/lttoolbox.jar lt-proc -e /home/j/esperanto/apertium/apertium-is-en/is.bin

^lambakjöti/lamb<n><nt><pl><gen><ind>+kjöt<n><nt><sg><dat><ind>$

Reasons for a Java port

• There are several devices (mobile phones, for example) which can run quite complicated software, but only if written in Java. lttoolbox is the first step to having Apertium run on these devices.
• Windows port. It won't be as powerfull as Unix based system, but it will be there
• Apertium will be the first MT system *ever* that can be demonstradet within a Java applets
• Transfer in bytecode has a promise of speedup factor 4 - compared to what we use now (interpreted XML). And transfer CPU usage is dominating when processing large amounts of text

State of Java port

j@j-laptop-nova:~/esperanto/apertium/lttoolbox-java/testdata/regression$ ./compare_java_and_c.sh
C analysis is... 0.39sec
OK
Java analysis is... 1.91sec
OK
C generator -g is ... 0.33sec
OK
Java generator -g is ... 1.26sec
OK
C generator -d is ... 0.33sec
OK
Java generator -d is ... 1.27sec
OK
C generator -n is ... 0.33sec
OK
Java generator -n is ... 1.25sec
OK
C postgenerator -p is ... 0.04sec
OK
Java postgenerator -p is ... 0.72sec
OK
All tests passed

--Jacob Nordfalk 08:52, 30 November 2009 (UTC)

Features

• Binary compatibility with lttoolbox. lttoolbox-java is able _read_ and _write_ the binary files lttoolbox and generates exactly the same output
• There is a comprehensive test suite that tests both lttoolbox (C++) and lttoolbox-java.

Other notes

<Drew_> jacobEo: I can't find a main class in the source code, am I looking in the wrong place? :S
<jacobEo> Drew_: LTComp.java, LTExpand.java, LTProc.java

Thanks

• Nic Cottrell contributed an initial version of a Java port of lttoolbox.
• During GSOC2009 Raphaël and Sergio worked on it, but processing still didnt work (compilation and expansion worked)
• November 2009 Jacob Nordfalk finished it up and optimized it