/**
* converts the sentence based instance list into a token based one This is needed for the
* ME-version of JET (JetMeClassifier)
*
* @param METrainerDummyPipe
* @param inst just the features for one sentence to be transformed
* @return
*/
public static InstanceList convertFeatsforClassifier(
final Pipe METrainerDummyPipe, final Instance inst) {
final InstanceList iList = new InstanceList(METrainerDummyPipe);
final FeatureVectorSequence fvs = (FeatureVectorSequence) inst.getData();
final LabelSequence ls = (LabelSequence) inst.getTarget();
final LabelAlphabet ldict = (LabelAlphabet) ls.getAlphabet();
final Object source = inst.getSource();
final Object name = inst.getName();
if (ls.size() != fvs.size()) {
System.err.println(
"failed making token instances: size of labelsequence != size of featue vector sequence: "
+ ls.size()
+ " - "
+ fvs.size());
System.exit(-1);
}
for (int j = 0; j < fvs.size(); j++) {
final Instance I =
new Instance(fvs.getFeatureVector(j), ldict.lookupLabel(ls.get(j)), name, source);
iList.add(I);
}
return iList;
}
public Instance pipe(Instance carrier) {
Sequence data = (Sequence) carrier.getData();
Sequence target = (Sequence) carrier.getTarget();
if (data.size() != target.size())
throw new IllegalArgumentException(
"Trying to print into SimpleTagger format, where data and target lengths do not match\n"
+ "data.length = "
+ data.size()
+ ", target.length = "
+ target.size());
int N = data.size();
if (data instanceof TokenSequence) {
throw new UnsupportedOperationException("Not yet implemented.");
} else if (data instanceof FeatureVectorSequence) {
FeatureVectorSequence fvs = (FeatureVectorSequence) data;
Alphabet dict = (fvs.size() > 0) ? fvs.getFeatureVector(0).getAlphabet() : null;
for (int i = 0; i < N; i++) {
Object label = target.get(i);
writer.print(label);
FeatureVector fv = fvs.getFeatureVector(i);
for (int loc = 0; loc < fv.numLocations(); loc++) {
writer.print(' ');
String fname = dict.lookupObject(fv.indexAtLocation(loc)).toString();
double value = fv.valueAtLocation(loc);
// if (!Maths.almostEquals(value, 1.0)) {
// throw new IllegalArgumentException ("Printing to SimpleTagger format: FeatureVector
// not binary at time slice "+i+" fv:"+fv);
// }
writer.print(fname + String.valueOf(value));
}
writer.println();
}
} else {
throw new IllegalArgumentException("Don't know how to print data of type " + data);
}
writer.println();
// writer.print(getDataAlphabet());
return carrier;
}
