Package org.apache.cassandra.db.filter

Examples of org.apache.cassandra.db.filter.SliceQueryFilter$Serializer

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            // We asked t (= count) live columns and got l (=liveCountInRow) ones.
            // From that, we can estimate that on this row, for x requested
            // columns, only l/t end up live after reconciliation. So for next
            // round we want to ask x column so that x * (l/t) == t, i.e. x = t^2/l.
            int retryCount = liveCountInRow == 0 ? count + 1 : ((count * count) / liveCountInRow) + 1;
            SliceQueryFilter newFilter = filter.withUpdatedCount(retryCount);
            return new RetriedSliceFromReadCommand(ksName, key, cfName, timestamp, newFilter, getOriginalRequestedCount());
        }

        return null;
    }
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        String keyspaceName = in.readUTF();
        ByteBuffer key = ByteBufferUtil.readWithShortLength(in);
        String cfName = in.readUTF();
        long timestamp = in.readLong();
        CFMetaData metadata = Schema.instance.getCFMetaData(keyspaceName, cfName);
        SliceQueryFilter filter = metadata.comparator.sliceQueryFilterSerializer().deserialize(in, version);
        ReadCommand command = new SliceFromReadCommand(keyspaceName, key, cfName, timestamp, filter);
        command.setDigestQuery(isDigest);
        return command;
    }
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    private SliceQueryFilter toInternalFilter(CFMetaData metadata, ColumnParent parent, SliceRange range)
    {
        Composite start = metadata.comparator.fromByteBuffer(range.start);
        Composite finish = metadata.comparator.fromByteBuffer(range.finish);
        SliceQueryFilter filter = new SliceQueryFilter(start, finish, range.reversed, range.count);
        if (metadata.isSuper())
            filter = SuperColumns.fromSCSliceFilter(metadata.comparator, parent.bufferForSuper_column(), filter);
        return filter;
    }
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            }

            SliceRange sliceRange = predicate.slice_range == null
                                  ? new SliceRange(ByteBufferUtil.EMPTY_BYTE_BUFFER, ByteBufferUtil.EMPTY_BYTE_BUFFER, false, Integer.MAX_VALUE)
                                  : predicate.slice_range;
            SliceQueryFilter filter = toInternalFilter(cfs.metadata, column_parent, sliceRange);

            return QueryPagers.countPaged(keyspace,
                                          column_parent.column_family,
                                          key,
                                          filter,
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        }

        public IDiskAtomFilter readFilter()
        {
            return expected == null || expected.isEmpty()
                 ? new SliceQueryFilter(ColumnSlice.ALL_COLUMNS_ARRAY, false, 1)
                 : new NamesQueryFilter(ImmutableSortedSet.copyOf(expected.getComparator(), expected.getColumnNames()));
        }
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                ss.add(comparator.cellFromByteBuffer(bb));
            filter = new NamesQueryFilter(ss);
        }
        else
        {
            filter = new SliceQueryFilter(comparator.fromByteBuffer(sr.start),
                                          comparator.fromByteBuffer(sr.finish),
                                          sr.reversed,
                                          sr.count);
        }
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        rm = new SliceByNamesReadCommand("Keyspace1", dk.key, "Standard1", ts, new NamesQueryFilter(colList));
        rm2 = serializeAndDeserializeReadMessage(rm);
        assert rm2.toString().equals(rm.toString());

        rm = new SliceFromReadCommand("Keyspace1", dk.key, "Standard1", ts, new SliceQueryFilter(Composites.EMPTY, Composites.EMPTY, true, 2));
        rm2 = serializeAndDeserializeReadMessage(rm);
        assert rm2.toString().equals(rm.toString());

        rm = new SliceFromReadCommand("Keyspace1", dk.key, "Standard1", ts, new SliceQueryFilter(Util.cellname("a"), Util.cellname("z"), true, 5));
        rm2 = serializeAndDeserializeReadMessage(rm);
        assert rm2.toString().equals(rm.toString());
    }
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    public static List<Row> getRangeSlice(ColumnFamilyStore cfs, ByteBuffer superColumn)
    {
        IDiskAtomFilter filter = superColumn == null
                               ? new IdentityQueryFilter()
                               : new SliceQueryFilter(SuperColumns.startOf(superColumn), SuperColumns.endOf(superColumn), false, Integer.MAX_VALUE);

        Token min = StorageService.getPartitioner().getMinimumToken();
        return cfs.getRangeSlice(new Bounds<Token>(min, min).toRowBounds(), null, filter, 10000);
    }
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        //
        // But, if the filter is asking for less columns than we have cached, we fall back to the slow path
        // since we have to copy out a subset.
        if (filter.filter instanceof SliceQueryFilter)
        {
            SliceQueryFilter sliceFilter = (SliceQueryFilter) filter.filter;
            if (sliceFilter.start.remaining() == 0 && sliceFilter.finish.remaining() == 0)
            {
                if (cached.isSuper() && filter.path.superColumnName != null)
                {
                    // subcolumns from named supercolumn
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        List<ReadCommand> commands = new ArrayList<ReadCommand>(keys.size());
        for (ByteBuffer key : keys)
            commands.add(new SliceFromReadCommand(keyspace(),
                                                  key,
                                                  new QueryPath(columnFamily()),
                                                  new SliceQueryFilter(slices, false, Integer.MAX_VALUE)));

        try
        {
            List<Row> rows = local
                           ? SelectStatement.readLocally(keyspace(), commands)
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