@Override
protected Query doToQuery(QueryShardContext context) throws IOException {
Query innerQuery;
String[] previousTypes = context.getTypes();
context.setTypes(type);
try {
innerQuery = query.toQuery(context);
} finally {
context.setTypes(previousTypes);
}
DocumentMapper parentDocMapper = context.getMapperService().documentMapper(type);
if (parentDocMapper == null) {
if (ignoreUnmapped) {
return new MatchNoDocsQuery();
} else {
throw new QueryShardException(
context,
"[" + NAME + "] query configured 'parent_type' [" + type + "] is not a valid type");
}
}
Set<String> childTypes = new HashSet<>();
ParentChildIndexFieldData parentChildIndexFieldData = null;
for (DocumentMapper documentMapper : context.getMapperService().docMappers(false)) {
ParentFieldMapper parentFieldMapper = documentMapper.parentFieldMapper();
if (parentFieldMapper.active() && type.equals(parentFieldMapper.type())) {
childTypes.add(documentMapper.type());
parentChildIndexFieldData = context.getForField(parentFieldMapper.fieldType());
}
}
if (childTypes.isEmpty()) {
throw new QueryShardException(
context, "[" + NAME + "] no child types found for type [" + type + "]");
}
Query childrenQuery;
if (childTypes.size() == 1) {
DocumentMapper documentMapper =
context.getMapperService().documentMapper(childTypes.iterator().next());
childrenQuery = documentMapper.typeFilter();
} else {
BooleanQuery.Builder childrenFilter = new BooleanQuery.Builder();
for (String childrenTypeStr : childTypes) {
DocumentMapper documentMapper = context.getMapperService().documentMapper(childrenTypeStr);
childrenFilter.add(documentMapper.typeFilter(), BooleanClause.Occur.SHOULD);
}
childrenQuery = childrenFilter.build();
}
// wrap the query with type query
innerQuery = Queries.filtered(innerQuery, parentDocMapper.typeFilter());
return new HasChildQueryBuilder.LateParsingQuery(
childrenQuery,
innerQuery,
HasChildQueryBuilder.DEFAULT_MIN_CHILDREN,
HasChildQueryBuilder.DEFAULT_MAX_CHILDREN,
type,
score ? ScoreMode.Max : ScoreMode.None,
parentChildIndexFieldData,
context.getSearchSimilarity());
}
