public static Filter newFilter(
QueryParseContext parseContext, String fieldPattern, String filterName) {
final FieldMappers fieldNamesMappers =
parseContext.mapperService().indexName(FieldNamesFieldMapper.NAME);
final FieldNamesFieldMapper fieldNamesMapper =
fieldNamesMappers == null ? null : (FieldNamesFieldMapper) fieldNamesMappers.mapper();
MapperService.SmartNameObjectMapper smartNameObjectMapper =
parseContext.smartObjectMapper(fieldPattern);
if (smartNameObjectMapper != null && smartNameObjectMapper.hasMapper()) {
// automatic make the object mapper pattern
fieldPattern = fieldPattern + ".*";
}
List<String> fields = parseContext.simpleMatchToIndexNames(fieldPattern);
if (fields.isEmpty()) {
// no fields exists, so we should not match anything
return Queries.MATCH_NO_FILTER;
}
MapperService.SmartNameFieldMappers nonNullFieldMappers = null;
XBooleanFilter boolFilter = new XBooleanFilter();
for (String field : fields) {
MapperService.SmartNameFieldMappers smartNameFieldMappers =
parseContext.smartFieldMappers(field);
if (smartNameFieldMappers != null) {
nonNullFieldMappers = smartNameFieldMappers;
}
Filter filter = null;
if (fieldNamesMapper != null && fieldNamesMapper.enabled()) {
final String f;
if (smartNameFieldMappers != null && smartNameFieldMappers.hasMapper()) {
f = smartNameFieldMappers.mapper().names().indexName();
} else {
f = field;
}
filter = fieldNamesMapper.termFilter(f, parseContext);
}
// if _field_names are not indexed, we need to go the slow way
if (filter == null && smartNameFieldMappers != null && smartNameFieldMappers.hasMapper()) {
filter = smartNameFieldMappers.mapper().rangeFilter(null, null, true, true, parseContext);
}
if (filter == null) {
filter = new TermRangeFilter(field, null, null, true, true);
}
boolFilter.add(filter, BooleanClause.Occur.SHOULD);
}
// we always cache this one, really does not change... (exists)
// its ok to cache under the fieldName cacheKey, since its per segment and the mapping applies
// to this data on this segment...
Filter filter =
parseContext.cacheFilter(boolFilter, new CacheKeyFilter.Key("$exists$" + fieldPattern));
filter = wrapSmartNameFilter(filter, nonNullFieldMappers, parseContext);
if (filterName != null) {
parseContext.addNamedFilter(filterName, filter);
}
return filter;
}
