Class DuplicateFilter

Filter to remove duplicate values from search results.

WARNING: for this to work correctly, you may have to wrap your reader as it cannot current deduplicate across different index segments.
Inheritance
object
Filter
DuplicateFilter
Inherited Members
Namespace: Lucene.Net.Sandbox.Queries
Assembly: Lucene.Net.Sandbox.dll
Syntax
public class DuplicateFilter : Filter

Constructors

DuplicateFilter(string)

Filter to remove duplicate values from search results.

WARNING: for this to work correctly, you may have to wrap your reader as it cannot current deduplicate across different index segments.
Declaration
public DuplicateFilter(string fieldName)
Parameters
Type Name Description
string fieldName
See Also
SlowCompositeReaderWrapper

DuplicateFilter(string, KeepMode, ProcessingMode)

Filter to remove duplicate values from search results.

WARNING: for this to work correctly, you may have to wrap your reader as it cannot current deduplicate across different index segments.
Declaration
public DuplicateFilter(string fieldName, KeepMode keepMode, ProcessingMode processingMode)
Parameters
Type Name Description
string fieldName
KeepMode keepMode
ProcessingMode processingMode
See Also
SlowCompositeReaderWrapper

Properties

FieldName

Filter to remove duplicate values from search results.

WARNING: for this to work correctly, you may have to wrap your reader as it cannot current deduplicate across different index segments.
Declaration
public virtual string FieldName { get; set; }
Property Value
Type Description
string
See Also
SlowCompositeReaderWrapper

KeepMode

Filter to remove duplicate values from search results.

WARNING: for this to work correctly, you may have to wrap your reader as it cannot current deduplicate across different index segments.
Declaration
public KeepMode KeepMode { get; set; }
Property Value
Type Description
KeepMode
See Also
SlowCompositeReaderWrapper

ProcessingMode

Filter to remove duplicate values from search results.

WARNING: for this to work correctly, you may have to wrap your reader as it cannot current deduplicate across different index segments.
Declaration
public ProcessingMode ProcessingMode { get; set; }
Property Value
Type Description
ProcessingMode
See Also
SlowCompositeReaderWrapper

Methods

Equals(object)

Determines whether the specified object is equal to the current object.

Declaration
public override bool Equals(object obj)
Parameters
Type Name Description
object obj

The object to compare with the current object.
Returns
Type Description
bool

true if the specified object is equal to the current object; otherwise, false.
Overrides
See Also
SlowCompositeReaderWrapper

GetDocIdSet(AtomicReaderContext, IBits)

Creates a Lucene.Net.Search.DocIdSet enumerating the documents that should be permitted in search results. NOTE:null can be returned if no documents are accepted by this Lucene.Net.Search.Filter.

Note: this method will be called once per segment in the index during searching. The returned Lucene.Net.Search.DocIdSet must refer to document IDs for that segment, not for the top-level reader.
Declaration
public override DocIdSet GetDocIdSet(AtomicReaderContext context, IBits acceptDocs)
Parameters
Type Name Description
AtomicReaderContext context

a Lucene.Net.Index.AtomicReaderContext instance opened on the index currently searched on. Note, it is likely that the provided reader info 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. The provided context is always an atomic context, so you can call Lucene.Net.Index.AtomicReader.Fields on the context's reader, for example.
IBits acceptDocs

Lucene.Net.Util.IBits that represent the allowable docs to match (typically deleted docs but possibly filtering other documents)
Returns
Type Description
DocIdSet

A Lucene.Net.Search.DocIdSet that provides the documents which should be permitted or prohibited in search results. NOTE:null should be returned if the filter doesn't accept any documents otherwise internal optimization might not apply in the case an emptyLucene.Net.Search.DocIdSet is returned.
Overrides
Lucene.Net.Search.Filter.GetDocIdSet(Lucene.Net.Index.AtomicReaderContext, Lucene.Net.Util.IBits)
See Also
SlowCompositeReaderWrapper

GetHashCode()

Serves as the default hash function.

Declaration
public override int GetHashCode()
Returns
Type Description
int

A hash code for the current object.
Overrides
See Also
SlowCompositeReaderWrapper

See Also

SlowCompositeReaderWrapper