@Test
public void testSimpleColumnCount() throws IOException {
RowFilter adaptedFilter =
adapter.adapt(new FilterAdapterContext(new Scan(), null), new ColumnCountGetFilter(2));
Assert.assertEquals(
RowFilter.newBuilder()
.setChain(
Chain.newBuilder()
.addFilters(RowFilter.newBuilder().setCellsPerColumnLimitFilter(1))
.addFilters(RowFilter.newBuilder().setCellsPerRowLimitFilter(2)))
.build(),
adaptedFilter);
}
/** Create a filter that will emit all cells in a row if a given qualifier has a given value. */
private RowFilter createEmitRowsWithValueFilter(
FilterAdapterContext context, SingleColumnValueFilter filter) throws IOException {
return RowFilter.newBuilder()
.setCondition(
Condition.newBuilder()
.setPredicateFilter(
RowFilter.newBuilder()
.setChain(
Chain.newBuilder()
.addFilters(createColumnSpecFilter(filter))
.addFilters(createValueMatchFilter(context, filter))))
.setTrueFilter(ALL_VALUES_FILTER))
.build();
}
/** Create a filter that will match a given family, qualifier, and cells per qualifier. */
private RowFilter createColumnSpecFilter(SingleColumnValueFilter filter) throws IOException {
return RowFilter.newBuilder()
.setChain(
Chain.newBuilder()
.addFilters(
RowFilter.newBuilder()
.setFamilyNameRegexFilter(
Bytes.toString(quoteRegularExpression(filter.getFamily()))))
.addFilters(
RowFilter.newBuilder()
.setColumnQualifierRegexFilter(
ByteStringer.wrap(quoteRegularExpression(filter.getQualifier()))))
.addFilters(createVersionLimitFilter(filter)))
.build();
}