JavaProjection.java

I/O and projection.This example shows how to use the projection operation. Its source code is under the samples/java directory.

import cogitant.base.Environment;
import cogitant.base.Graph;
import cogitant.base.IOHandler;
import cogitant.base.Projection;
import java.io.FileInputStream;

public class JavaProjection
{
    public static void run(String prefix) throws Exception
    {
        Environment environment = new cogitant.jni.Environment();
        environment.setIOConfig(IOHandler.ConfigPropertyBool.KEEPGRAPHOBJECTIDENTIFIERS, true);
        environment.loadSupport(new FileInputStream(prefix + "/xml/bucolic/bucolic_id.cogxml"), IOHandler.Format.COGXML);
        environment.loadObjects(new FileInputStream(prefix + "/xml/bucolic/fact_coref.cogxml"), IOHandler.Format.COGXML);
        environment.loadObjects(new FileInputStream(prefix + "/xml/bucolic/query.cogxml"), IOHandler.Format.COGXML);
        
        Graph g = environment.findGraph("query");
        Graph h = environment.findGraph("fact_coref");
        // Search for projections from g to h
        System.out.println(environment.projectionHas(g, h));
        System.out.println(environment.projectionNum(g, h));
        System.out.println(environment.projectionFind(g, h)); // -> 2 projections
        // Search again projections from g to h, but this time, we only want projections such that cn15 (from h) is the image of cn12 (from g).
        Projection partialproj = environment.newProjection(g,h);
        partialproj.newCouple(g.findByIdentifier("cn12"), h.findByIdentifier("cn15"));
        environment.projectionConfig().setInitialProjection(partialproj);
        System.out.println(environment.projectionFind(g, h)); // -> only 1 projection
        environment.projectionConfig().setInitialProjection(null);
    }
    
    public static void main(String args[]) throws Exception
    {
        String prefix = "..";
        if (args.length == 1)
            prefix = args[0];
        System.out.println("prefix: " + prefix);
        run(prefix);
    }
}