com.google.cloud.bigtable.hbase.adapters.filters

Class PrefixFilterAdapter

java.lang.Object

com.google.cloud.bigtable.hbase.adapters.filters.TypedFilterAdapterBase<org.apache.hadoop.hbase.filter.PrefixFilter>

com.google.cloud.bigtable.hbase.adapters.filters.PrefixFilterAdapter

All Implemented Interfaces:

TypedFilterAdapter<org.apache.hadoop.hbase.filter.PrefixFilter>

@InternalApi(value="For internal usage only")
public class PrefixFilterAdapter
extends TypedFilterAdapterBase<org.apache.hadoop.hbase.filter.PrefixFilter>

Adapter for HBase PrefixFilter instances.

For internal use only - public for technical reasons.

Constructor Summary

Constructors

Constructor and Description
PrefixFilterAdapter()

Method Summary

Modifier and Type	Method and Description
com.google.cloud.bigtable.data.v2.models.Filters.Filter	adapt(FilterAdapterContext context, org.apache.hadoop.hbase.filter.PrefixFilter filter) Adapt the given filter.
com.google.common.collect.RangeSet<RowKeyWrapper>	getIndexScanHint(org.apache.hadoop.hbase.filter.PrefixFilter filter) Get hints how to optimize the scan.
FilterSupportStatus	isFilterSupported(FilterAdapterContext context, org.apache.hadoop.hbase.filter.PrefixFilter filter) Determine if the given filter can be adapted to a Bigtable RowFilter.

Methods inherited from class java.lang.Object

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

Constructor Detail

PrefixFilterAdapter

public PrefixFilterAdapter()

Method Detail

adapt

public com.google.cloud.bigtable.data.v2.models.Filters.Filter adapt(FilterAdapterContext context,
                                                                     org.apache.hadoop.hbase.filter.PrefixFilter filter)
                                                              throws IOException

Adapt the given filter. Implementers of this method should assume that isFilterSupported has already been called with a result indicating it is in fact supproted.

Parameters:

context - a FilterAdapterContext object.

filter - a S object.

Returns:

a Filters.Filter object.

Throws:

IOException - if any.

isFilterSupported

public FilterSupportStatus isFilterSupported(FilterAdapterContext context,
                                             org.apache.hadoop.hbase.filter.PrefixFilter filter)

Determine if the given filter can be adapted to a Bigtable RowFilter.

Parameters:

context - a FilterAdapterContext object.

filter - a S object.

Returns:

a FilterSupportStatus object.

getIndexScanHint

public com.google.common.collect.RangeSet<RowKeyWrapper> getIndexScanHint(org.apache.hadoop.hbase.filter.PrefixFilter filter)

Description copied from interface: TypedFilterAdapter

Get hints how to optimize the scan. For example if the filter will narrow the scan using the prefix "ab" then we can restrict the scan to ["ab" - "ac"). If the filter doesn't narrow the scan then it should return Range.all()

Specified by:

getIndexScanHint in interface TypedFilterAdapter<org.apache.hadoop.hbase.filter.PrefixFilter>

Overrides:

getIndexScanHint in class TypedFilterAdapterBase<org.apache.hadoop.hbase.filter.PrefixFilter>

Parameters:

filter - a S object.

Returns:

a RangeSet object.