org.apache.lucene.sandbox.queries
Class DuplicateFilter

java.lang.Object
  org.apache.lucene.search.Filter
      org.apache.lucene.sandbox.queries.DuplicateFilter

public class DuplicateFilter
extends Filter

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.

See Also:

SlowCompositeReaderWrapper

Nested Class Summary

static class	DuplicateFilter.KeepMode KeepMode determines which document id to consider as the master, all others being identified as duplicates.
static class	DuplicateFilter.ProcessingMode "Full" processing mode starts by setting all bits to false and only setting bits for documents that contain the given field and are identified as none-duplicates.

Constructor Summary

DuplicateFilter(String fieldName)

DuplicateFilter(String fieldName, DuplicateFilter.KeepMode keepMode, DuplicateFilter.ProcessingMode processingMode)

Method Summary

boolean	equals(Object obj)
DocIdSet	getDocIdSet(AtomicReaderContext context, Bits acceptDocs)
String	getFieldName()
DuplicateFilter.KeepMode	getKeepMode()
DuplicateFilter.ProcessingMode	getProcessingMode()
int	hashCode()
void	setFieldName(String fieldName)
void	setKeepMode(DuplicateFilter.KeepMode keepMode)
void	setProcessingMode(DuplicateFilter.ProcessingMode processingMode)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DuplicateFilter

public DuplicateFilter(String fieldName)

DuplicateFilter

public DuplicateFilter(String fieldName,
                       DuplicateFilter.KeepMode keepMode,
                       DuplicateFilter.ProcessingMode processingMode)

Method Detail

getDocIdSet

public DocIdSet getDocIdSet(AtomicReaderContext context,
                            Bits acceptDocs)
                     throws IOException

Specified by:

getDocIdSet in class Filter

Throws:

IOException

getFieldName

public String getFieldName()

setFieldName

public void setFieldName(String fieldName)

getKeepMode

public DuplicateFilter.KeepMode getKeepMode()

setKeepMode

public void setKeepMode(DuplicateFilter.KeepMode keepMode)

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getProcessingMode

public DuplicateFilter.ProcessingMode getProcessingMode()

setProcessingMode

public void setProcessingMode(DuplicateFilter.ProcessingMode processingMode)