use of org.apache.lucene.search.FilterClause in project greplin-lucene-utils by Cue.
the class Filters method or.
/**
* Returns a filter that allows documents that match any constituent
* filter. For convenience, null values are accepted and ignored. If
* all values are null, null will be returned.
* @param filters the filters to combine
* @return the combined filter
*/
@Nullable
public static Filter or(final Iterable<Filter> filters) {
final BooleanFilter booleanFilter = new BooleanFilter();
Filter lastFilter = null;
int count = 0;
for (Filter filter : filters) {
if (filter != null) {
booleanFilter.add(new FilterClause(filter, BooleanClause.Occur.SHOULD));
count += 1;
lastFilter = filter;
}
}
if (count == 0) {
return null;
} else if (count == 1) {
return lastFilter;
} else {
return booleanFilter;
}
}
use of org.apache.lucene.search.FilterClause in project greplin-lucene-utils by Cue.
the class Filters method not.
/**
* Returns a filter matching the inverse of the given filter.
* @param filter the filter to return the opposite of
* @return the negated filter
*/
public static Filter not(final Filter filter) {
final BooleanFilter booleanFilter = new BooleanFilter();
booleanFilter.add(new FilterClause(filter, BooleanClause.Occur.MUST_NOT));
return booleanFilter;
}
use of org.apache.lucene.search.FilterClause in project greplin-lucene-utils by Cue.
the class Filters method and.
/**
* Returns a filter that allows documents that match every constituent
* filter. For convenience, null values are accepted and ignored. If
* all values are null, null will be returned.
* @param filters the filters to combine
* @return the combined filter
*/
@Nullable
public static Filter and(final Iterable<Filter> filters) {
final BooleanFilter booleanFilter = new BooleanFilter();
Filter lastFilter = null;
int count = 0;
for (Filter filter : filters) {
if (filter != null) {
booleanFilter.add(new FilterClause(filter, BooleanClause.Occur.MUST));
count += 1;
lastFilter = filter;
}
}
if (count == 0) {
return null;
} else if (count == 1) {
return lastFilter;
} else {
return booleanFilter;
}
}
Aggregations