| package joshua.decoder.ff; |
| |
| import java.util.List; |
| |
| import joshua.decoder.JoshuaConfiguration; |
| import joshua.decoder.chart_parser.SourcePath; |
| import joshua.decoder.ff.state_maintenance.DPState; |
| import joshua.decoder.ff.tm.Rule; |
| import joshua.decoder.hypergraph.HGNode; |
| import joshua.decoder.segment_file.Sentence; |
| |
| /** |
| * This feature returns the scored path through the source lattice, which is recorded in a |
| * SourcePath object. |
| * |
| * @author Chris Dyer <redpony@umd.edu> |
| * @author Matt Post <post@cs.jhu.edu> |
| */ |
| public final class SourcePathFF extends StatelessFF { |
| |
| /* |
| * This is a single-value feature template, so we cache the weight here. |
| */ |
| public SourcePathFF(FeatureVector weights, String[] args, JoshuaConfiguration config) { |
| super(weights, "SourcePath", args, config); |
| } |
| |
| @Override |
| public DPState compute(Rule rule, List<HGNode> tailNodes, int i, int j, SourcePath sourcePath, |
| Sentence sentence, Accumulator acc) { |
| |
| acc.add(name, sourcePath.getPathCost()); |
| return null; |
| } |
| } |