ParameterGrounder.java

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package edu.tum.cs.srl;

import java.util.Collection;
import java.util.Set;
import java.util.Vector;

import edu.tum.cs.srl.bayesnets.RelationalBeliefNetwork;
import edu.tum.cs.srl.bayesnets.RelationalNode;

public class ParameterGrounder {
        @Deprecated
        public static Collection<String[]> generateGroundings(RelationalNode node, Database db) throws Exception {
                return generateGroundings(db, node.getSignature().argTypes);
        }

        public static Collection<String[]> generateGroundings(Signature sig, Database db) throws Exception {
                return generateGroundings(db, sig.argTypes);    
        }
        
        public static Collection<String[]> generateGroundings(RelationalModel model, String function, Database db) throws Exception {
                try {
                        return generateGroundings(db, model.getSignature(function).argTypes);
                }
                catch(Exception e) {
                        System.err.println("Warning: " + e.getMessage() + " (while grounding '" + function + "')");
                        return new Vector<String[]>();
                }
        }
        
        public static Collection<String[]> generateGroundings(Database db, String[] domainNames) throws Exception {
                Vector<String[]> ret = new Vector<String[]>();
                generateGroundings(ret, db, new String[domainNames.length], domainNames, 0);
                return ret;
        }
        
        // TODO it would be better to use an iterator that generates groundings as we go along rather than putting them all into one big collection
        private static void generateGroundings(Collection<String[]> ret, Database db, String[] params, String[] domainNames, int i) throws Exception {
                // if we have the full set of parameters, add it to the collection
                if(i == domainNames.length) {
                        ret.add(params.clone());
                        return;
                }
                // otherwise consider all ways of extending the current list of parameters using the domain elements that are applicable
                Iterable<String> domain = db.getDomain(domainNames[i]);         
                if(domain == null)
                        throw new Exception("Domain " + domainNames[i] + " not found in the database!");
                for(String element : domain) {
                        params[i] = element;
                        generateGroundings(ret, db, params, domainNames, i+1);  
                }               
        }
}

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srldb
Author(s): Dominik Jain, Stefan Waldherr, Moritz Tenorth
autogenerated on Fri Jan 11 09:58:29 2013