- All Implemented Interfaces:
- Direct Known Subclasses:
- CachingWrapperFilter, FieldCacheRangeFilter, FieldCacheTermsFilter, MultiTermQueryWrapperFilter, QueryWrapperFilter, SpanFilter
public abstract class Filter
- extends Object
- implements Serializable
Abstract base class for restricting which documents may
be returned during searching.
- See Also:
- Serialized Form
|Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public abstract DocIdSet getDocIdSet(IndexReader reader)
- Creates a
DocIdSet enumerating the documents that should be
permitted in search results. NOTE: null can be
returned if no documents are accepted by this Filter.
Note: This method will be called once per segment in
the index during searching. The returned
must refer to document IDs for that segment, not for
the top-level reader.
reader - a
IndexReader instance opened on the index currently
searched on. Note, it is likely that the provided reader does not
represent the whole underlying index i.e. if the index has more than
one segment the given reader only represents a single segment.
- a DocIdSet that provides the documents which should be permitted or
prohibited in search results. NOTE: null can be returned if
no documents will be accepted by this Filter.
- See Also:
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