Examples of org.kiji.schema.filter.StripValueColumnFilter

org.kiji.schema.filter.StripValueColumnFilter
Column filter to strip the cell value.
This filter is useful to retrieve the qualifiers and/or version timestamps in a column.

TODO(SCHEMA-334): there is a bug that may cause this filter to apply to all columns in a row even if this filter is attached to a subset of the columns only in a KijiDataRequest. For now, if you want to strip the value on specific columns within a data request, you need to issue separate Get requests for this set of columns.


    final KijiColumnFilter filter = Filters.and(
        new KijiColumnRangeFilter(mMinQualifier, false, null, false),  // qualifier > mMinQualifier
        mColumnRequest.getFilter(),  // user filter
        new KijiPaginationFilter(pageSize),  // Select at most 1 version per qualifier
        new StripValueColumnFilter());  // discard the cell content, we just need the qualifiers


    final KijiDataRequest nextPageDataRequest = KijiDataRequest.builder()
        .withTimeRange(mDataRequest.getMinTimestamp(), mDataRequest.getMaxTimestamp())
        .addColumns(ColumnsDef.create()
            .withFilter(filter)

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    final KijiColumnFilter filter = Filters.and(
        new KijiColumnRangeFilter(mMinQualifier, false, null, false),  // qualifier > mMinQualifier
        mColumnRequest.getFilter(),  // user filter
        new KijiPaginationFilter(pageSize),  // Select at most one version / qualifier.
        new StripValueColumnFilter());  // discard the cell content, we just need the qualifiers


    final KijiDataRequest nextPageDataRequest = KijiDataRequest.builder()
        .withTimeRange(mDataRequest.getMinTimestamp(), mDataRequest.getMaxTimestamp())
        .addColumns(ColumnsDef.create()
            .withFilter(filter)

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Related Classes of org.kiji.schema.filter.StripValueColumnFilter

org.apache.hadoop.hbase.filter.KeyOnlyFilter

org.kiji.schema.impl.hbase.HBaseMapFamilyPager

org.kiji.schema.impl.hbase.HBaseQualifierPager

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