Learning Based Java is a modeling language for the rapid development of software systems with one or more learned functions, designed for use with the Java programming language. LBJava offers a convenient, declarative syntax for classifier and constraint definition directly in terms of the objects in the programmer's application. With LBJava, the details of feature extraction, learning, model evaluation, and inference are all abstracted away from the programmer, leaving him to reason more directly about his application.

Visit each link for its content

1. Introduction
2. Basics and definitions
3. A working example: classifiying newsgroup documents into topics
4. Syntax of LBJava
5. LBJava library
6. A working example: regression
7. Learning Algorithms

To include LBJava in your Maven project, add the following snippet with the #version entry replaced with the version listed in this project's pom.xml file. Note that you also add to need the <repository> element for the CogComp maven repository in the <repositories> element.

    <dependencies>
         ...
        <dependency>
            <groupId>edu.illinois.cs.cogcomp</groupId>
            <artifactId>LBJava</artifactId>
            <version>#version#</version>
        </dependency>
        ...
    </dependencies>
    ...
    <repositories>
        <repository>
            <id>CogcompSoftware</id>
            <name>CogcompSoftware</name>
            <url>http://cogcomp.cs.illinois.edu/m2repo/</url>
        </repository>
    </repositories>

To compile the .lbj files into Java code you will need to use the LBJava maven plugin. Briefly, you need to add the <pluginRepositories> and <build> snippets into your pom.xml file:

<pluginRepositories>
    <pluginRepository>
        <id>CogcompSoftware</id>
        <name>CogcompSoftware</name>
        <url>http://cogcomp.cs.illinois.edu/m2repo/</url>
    </pluginRepository>
</pluginRepositories>
...
<build>
 <plugins>
   <plugin>
     <groupId>edu.illinois.cs.cogcomp</groupId>
     <artifactId>lbjava-maven-plugin</artifactId>
     <version>LBJAVA-VERSION</version>
     <configuration>
       <lbjavaInputFileList>
         <param>lbjava/MyClassifier.lbj</param>
       </lbjavaInputFileList>
     </configuration>
   </plugin>
 </plugins>
</build>

To compile and package the LBJava code simply run:

mvn install

NB: If you need to run mvn clean at any point, make sure to create target/classes directory before running mvn compile/install since it is required for the java-source compilation process.

LBJava uses the the solvers included in illinois-inference for inference. We refer the interested reader to the aforementioned library, for more details and instructions on how to install these libraries.

This project was started by Nicholas Rizzolo. It was ported to Maven as LBJava (v.1.0) by Christos Christodoulopoulos.