@InterfaceAudience.Public @InterfaceStability.Stable public class FirstKeyOnlyFilter extends FilterBase
This filter can be used to more efficiently perform row count operations.
Filter.ReturnCode
Constructor and Description |
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FirstKeyOnlyFilter() |
Modifier and Type | Method and Description |
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static Filter |
createFilterFromArguments(ArrayList<byte[]> filterArguments) |
Filter.ReturnCode |
filterKeyValue(Cell v)
Filters that dont filter by key value can inherit this implementation that
includes all Cells.
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protected boolean |
hasFoundKV() |
static FirstKeyOnlyFilter |
parseFrom(byte[] pbBytes) |
void |
reset()
Filters that are purely stateless and do nothing in their reset() methods can inherit
this null/empty implementation.
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protected void |
setFoundKV(boolean value) |
byte[] |
toByteArray()
Return length 0 byte array for Filters that don't require special serialization
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filterAllRemaining, filterRow, filterRow, filterRowCells, filterRowKey, getNextCellHint, getNextKeyHint, hasFilterRow, isFamilyEssential, toString, transform, transformCell
isReversed, setReversed
public void reset()
FilterBase
reset
in class FilterBase
public Filter.ReturnCode filterKeyValue(Cell v)
FilterBase
filterKeyValue
in class FilterBase
v
- the Cell in questionFilter.ReturnCode
public static Filter createFilterFromArguments(ArrayList<byte[]> filterArguments)
protected boolean hasFoundKV()
protected void setFoundKV(boolean value)
value
- update foundKV
flag with value.public byte[] toByteArray()
FilterBase
toByteArray
in class FilterBase
public static FirstKeyOnlyFilter parseFrom(byte[] pbBytes) throws DeserializationException
pbBytes
- A pb serialized FirstKeyOnlyFilter
instanceFirstKeyOnlyFilter
made from bytes
DeserializationException
toByteArray()
Copyright © 2015 The Apache Software Foundation. All rights reserved.