@Override
protected List<Citation> collapseNonEmpty(List<Citation> objects) {
Map<Integer, List<Citation>> citationsByPositionMap = new HashMap<Integer, List<Citation>>();
for (Citation citation : objects) {
List<Citation> list = citationsByPositionMap.get(citation.getEntry().getPosition());
if (list == null) {
citationsByPositionMap.put(
citation.getEntry().getPosition(), list = new ArrayList<Citation>());
}
list.add(citation);
}
List<Citation> results = new ArrayList<Citation>(citationsByPositionMap.size());
for (List<Citation> citationsByPosition : citationsByPositionMap.values()) {
results.add(collapseForPosition(citationsByPosition));
}
return results;
}
/**
* Merges existing citation with new citation entry details.
*
* @param existingCitation
* @param newCitationEntry
* @return existing citation supplemented with new citation entry details
*/
Citation merge(Citation existingCitation, CitationEntry newCitationEntry) {
if (newCitationEntry != null) {
if (newCitationEntry.getDestinationDocumentId() != null
&& newCitationEntry.getConfidenceLevel() != null) {
// setting only when not set or when confidence level higher than already stored
// important assumption is based on schema assurance: confidenceLevel is always set
// when destinationDocumentId was set
if (existingCitation.getEntry().getDestinationDocumentId() == null
|| existingCitation.getEntry().getConfidenceLevel() == null
|| existingCitation.getEntry().getConfidenceLevel()
< newCitationEntry.getConfidenceLevel()) {
existingCitation
.getEntry()
.setDestinationDocumentId(newCitationEntry.getDestinationDocumentId());
existingCitation.getEntry().setConfidenceLevel(newCitationEntry.getConfidenceLevel());
}
}
// according to schema externalDestinationDocumentIds cannot be null
if (!newCitationEntry.getExternalDestinationDocumentIds().isEmpty()) {
existingCitation
.getEntry()
.getExternalDestinationDocumentIds()
.putAll(newCitationEntry.getExternalDestinationDocumentIds());
}
if (newCitationEntry.getRawText() != null && newCitationEntry.getRawText().length() > 0) {
existingCitation.getEntry().setRawText(newCitationEntry.getRawText());
}
}
return existingCitation;
}