/**
* ************************************************************************************************************
* If we haven't managed to create a subject, try creating one with Patient. The result will be
* "experiences" + the process verb in a noun form. This can be seen as a precursor of correct
* passive voice.
*/
private void doPassiveVoice() {
List<CaseRole> caseRolesToUse =
Lists.newArrayList(
CaseRole.EXPERIENCER,
CaseRole.MOVES,
CaseRole.PATIENT,
CaseRole.RESOURCE,
CaseRole.ATTENDS);
// Set subject.
StringBuilder sBuild = new StringBuilder();
for (CaseRole role : caseRolesToUse) {
String obj = formulateNounPhraseForCaseRole(role, subject, kb);
if (!obj.isEmpty()) {
sBuild.append(" ").append(obj).append(" ");
getCaseRolesScratchpad().removeAll(role);
break;
}
}
subject.setSurfaceForm(sBuild.toString().replaceAll("\\s+", " ").trim());
// Set verb to "experiences" and the direct object to a noun form of the process.
verb.setVerbAndDirectObject(this);
}
/**
* ************************************************************************************************************
* Attempt to perform natural language generation on this object.
*
* @return a sentence in natural language, or empty string on failure
*/
public String toNaturalLanguage() {
formulateNaturalSubject();
formulateNaturalVerb();
formulateNaturalDirectObject();
formulateNaturalIndirectObject();
if (subject.getSurfaceForm().isEmpty()) {
reset();
doPassiveVoice();
}
// If no subject, perform no NLG.
if (subject.getSurfaceForm().isEmpty()) {
return "";
}
String indirectObjectStr = concatenateIndirectObjects();
String cleanedStr =
(subject.getSurfaceForm()
+ " "
+ verb.getSurfaceForm()
+ " "
+ directObject.getSurfaceForm()
+ " "
+ indirectObjectStr);
return cleanedStr.replaceAll("\\s+", " ").trim();
}
/**
* ************************************************************************************************************
*/
void formulateNaturalVerb() {
verb.formulateNaturalVerb(this);
}