@Override
public Counter<String> apply(Triple<State, Action, State> triple) {
// Variables
State from = triple.first;
Action action = triple.second;
State to = triple.third;
String signature = action.signature();
String edgeRelTaken = to.edge == null ? "root" : to.edge.getRelation().toString();
String edgeRelShort = to.edge == null ? "root" : to.edge.getRelation().getShortName();
if (edgeRelShort.contains("_")) {
edgeRelShort = edgeRelShort.substring(0, edgeRelShort.indexOf("_"));
}
// -- Featurize --
// Variables to aggregate
boolean parentHasSubj = false;
boolean parentHasObj = false;
boolean childHasSubj = false;
boolean childHasObj = false;
Counter<String> feats = new ClassicCounter<>();
// 1. edge taken
feats.incrementCount(signature + "&edge:" + edgeRelTaken);
feats.incrementCount(signature + "&edge_type:" + edgeRelShort);
// 2. last edge taken
if (from.edge == null) {
assert to.edge == null || to.originalTree().getRoots().contains(to.edge.getGovernor());
feats.incrementCount(signature + "&at_root");
feats.incrementCount(
signature + "&at_root&root_pos:" + to.originalTree().getFirstRoot().tag());
} else {
feats.incrementCount(signature + "¬_root");
String lastRelShort = from.edge.getRelation().getShortName();
if (lastRelShort.contains("_")) {
lastRelShort = lastRelShort.substring(0, lastRelShort.indexOf("_"));
}
feats.incrementCount(signature + "&last_edge:" + lastRelShort);
}
if (to.edge != null) {
// 3. other edges at parent
for (SemanticGraphEdge parentNeighbor :
from.originalTree().outgoingEdgeIterable(to.edge.getGovernor())) {
if (parentNeighbor != to.edge) {
String parentNeighborRel = parentNeighbor.getRelation().toString();
if (parentNeighborRel.contains("subj")) {
parentHasSubj = true;
}
if (parentNeighborRel.contains("obj")) {
parentHasObj = true;
}
// (add feature)
feats.incrementCount(signature + "&parent_neighbor:" + parentNeighborRel);
feats.incrementCount(
signature
+ "&edge_type:"
+ edgeRelShort
+ "&parent_neighbor:"
+ parentNeighborRel);
}
}
// 4. Other edges at child
int childNeighborCount = 0;
for (SemanticGraphEdge childNeighbor :
from.originalTree().outgoingEdgeIterable(to.edge.getDependent())) {
String childNeighborRel = childNeighbor.getRelation().toString();
if (childNeighborRel.contains("subj")) {
childHasSubj = true;
}
if (childNeighborRel.contains("obj")) {
childHasObj = true;
}
childNeighborCount += 1;
// (add feature)
feats.incrementCount(signature + "&child_neighbor:" + childNeighborRel);
feats.incrementCount(
signature + "&edge_type:" + edgeRelShort + "&child_neighbor:" + childNeighborRel);
}
// 4.1 Number of other edges at child
feats.incrementCount(
signature
+ "&child_neighbor_count:"
+ (childNeighborCount < 3 ? childNeighborCount : ">2"));
feats.incrementCount(
signature
+ "&edge_type:"
+ edgeRelShort
+ "&child_neighbor_count:"
+ (childNeighborCount < 3 ? childNeighborCount : ">2"));
// 5. Subject/Object stats
feats.incrementCount(signature + "&parent_neighbor_subj:" + parentHasSubj);
feats.incrementCount(signature + "&parent_neighbor_obj:" + parentHasObj);
feats.incrementCount(signature + "&child_neighbor_subj:" + childHasSubj);
feats.incrementCount(signature + "&child_neighbor_obj:" + childHasObj);
// 6. POS tag info
feats.incrementCount(signature + "&parent_pos:" + to.edge.getGovernor().tag());
feats.incrementCount(signature + "&child_pos:" + to.edge.getDependent().tag());
feats.incrementCount(
signature
+ "&pos_signature:"
+ to.edge.getGovernor().tag()
+ "_"
+ to.edge.getDependent().tag());
feats.incrementCount(
signature
+ "&edge_type:"
+ edgeRelShort
+ "&pos_signature:"
+ to.edge.getGovernor().tag()
+ "_"
+ to.edge.getDependent().tag());
}
return feats;
}
