Examples with IsNotNull org.apache.spark.sql.sources.IsNotNull used on opensource projects

Example 1 with IsNotNull

use of org.apache.spark.sql.sources.IsNotNull in project Gaffer by gchq.

the class FiltersToOperationConverter method getFunctionsFromFilter.

/**
     * Converts a Spark {@link Filter} to a map from group to a list of Gaffer {@link ConsumerFunctionContext}s.
     * <p>
     * Note that Spark also applies all the filters provided to the <code>buildScan(String[], Filter[])</code> method
     * so not implementing some of the provided {@link Filter}s in Gaffer will not cause errors. However, as many as
     * possible should be implemented so that as much filtering as possible happens in iterators running in Accumulo's
     * tablet servers (this avoids unnecessary data transfer from Accumulo to Spark).
     *
     * @param filter The {@link Filter} to transform.
     * @return A map from {@link String} to {@link ConsumerFunctionContext}s implementing the provided {@link Filter}.
     */
private Map<String, List<ConsumerFunctionContext<String, FilterFunction>>> getFunctionsFromFilter(final Filter filter) {
    final Map<String, List<ConsumerFunctionContext<String, FilterFunction>>> map = new HashMap<>();
    if (filter instanceof EqualTo) {
    // Not dealt with as requires a FilterFunction that returns null if either the controlValue or the
    // test value is null - the API of FilterFunction doesn't permit this.
    } else if (filter instanceof EqualNullSafe) {
        final EqualNullSafe equalNullSafe = (EqualNullSafe) filter;
        final FilterFunction isEqual = new IsEqual(equalNullSafe.value());
        final List<String> properties = Collections.singletonList(equalNullSafe.attribute());
        final Set<String> relevantGroups = getGroupsFromFilter(filter);
        if (relevantGroups != null) {
            for (final String group : relevantGroups) {
                if (!map.containsKey(group)) {
                    map.put(group, new ArrayList<ConsumerFunctionContext<String, FilterFunction>>());
                }
                map.get(group).add(new ConsumerFunctionContext<>(isEqual, properties));
            }
        }
        LOGGER.debug("Converted {} to IsEqual ({})", filter, properties.get(0));
    } else if (filter instanceof GreaterThan) {
        final GreaterThan greaterThan = (GreaterThan) filter;
        final FilterFunction isMoreThan = new IsMoreThan((Comparable<?>) greaterThan.value(), false);
        final List<String> properties = Collections.singletonList(greaterThan.attribute());
        final Set<String> relevantGroups = getGroupsFromFilter(filter);
        if (relevantGroups != null) {
            for (final String group : relevantGroups) {
                if (!map.containsKey(group)) {
                    map.put(group, new ArrayList<ConsumerFunctionContext<String, FilterFunction>>());
                }
                map.get(group).add(new ConsumerFunctionContext<>(isMoreThan, properties));
            }
        }
        LOGGER.debug("Converted {} to isMoreThan ({})", filter, properties.get(0));
    } else if (filter instanceof GreaterThanOrEqual) {
        final GreaterThanOrEqual greaterThan = (GreaterThanOrEqual) filter;
        final FilterFunction isMoreThan = new IsMoreThan((Comparable<?>) greaterThan.value(), true);
        final List<String> properties = Collections.singletonList(greaterThan.attribute());
        final Set<String> relevantGroups = getGroupsFromFilter(filter);
        if (relevantGroups != null) {
            for (final String group : relevantGroups) {
                if (!map.containsKey(group)) {
                    map.put(group, new ArrayList<ConsumerFunctionContext<String, FilterFunction>>());
                }
                map.get(group).add(new ConsumerFunctionContext<>(isMoreThan, properties));
            }
        }
        LOGGER.debug("Converted {} to IsMoreThan ({})", filter, properties.get(0));
    } else if (filter instanceof LessThan) {
        final LessThan lessThan = (LessThan) filter;
        final FilterFunction isLessThan = new IsLessThan((Comparable<?>) lessThan.value(), false);
        final List<String> properties = Collections.singletonList(lessThan.attribute());
        final Set<String> relevantGroups = getGroupsFromFilter(filter);
        if (relevantGroups != null) {
            for (final String group : relevantGroups) {
                if (!map.containsKey(group)) {
                    map.put(group, new ArrayList<ConsumerFunctionContext<String, FilterFunction>>());
                }
                map.get(group).add(new ConsumerFunctionContext<>(isLessThan, properties));
            }
        }
        LOGGER.debug("Converted {} to IsLessThan ({})", filter, properties.get(0));
    } else if (filter instanceof LessThanOrEqual) {
        final LessThanOrEqual lessThan = (LessThanOrEqual) filter;
        final FilterFunction isLessThan = new IsLessThan((Comparable<?>) lessThan.value(), true);
        final List<String> properties = Collections.singletonList(lessThan.attribute());
        final Set<String> relevantGroups = getGroupsFromFilter(filter);
        if (relevantGroups != null) {
            for (final String group : relevantGroups) {
                if (!map.containsKey(group)) {
                    map.put(group, new ArrayList<ConsumerFunctionContext<String, FilterFunction>>());
                }
                map.get(group).add(new ConsumerFunctionContext<>(isLessThan, properties));
            }
        }
        LOGGER.debug("Converted {} to LessThanOrEqual ({})", filter, properties.get(0));
    } else if (filter instanceof In) {
        final In in = (In) filter;
        final FilterFunction isIn = new IsIn(new HashSet<>(Arrays.asList(in.values())));
        final List<String> properties = Collections.singletonList(in.attribute());
        final Set<String> relevantGroups = getGroupsFromFilter(filter);
        if (relevantGroups != null) {
            for (final String group : relevantGroups) {
                if (!map.containsKey(group)) {
                    map.put(group, new ArrayList<ConsumerFunctionContext<String, FilterFunction>>());
                }
                map.get(group).add(new ConsumerFunctionContext<>(isIn, properties));
            }
        }
        LOGGER.debug("Converted {} to IsIn ({})", filter, properties.get(0));
    } else if (filter instanceof IsNull) {
        final IsNull isNull = (IsNull) filter;
        final FilterFunction doesntExist = new Not(new Exists());
        final List<String> properties = Collections.singletonList(isNull.attribute());
        final Set<String> relevantGroups = getGroupsFromFilter(filter);
        if (relevantGroups != null) {
            for (final String group : relevantGroups) {
                if (!map.containsKey(group)) {
                    map.put(group, new ArrayList<ConsumerFunctionContext<String, FilterFunction>>());
                }
                map.get(group).add(new ConsumerFunctionContext<>(doesntExist, properties));
            }
        }
        LOGGER.debug("Converted {} to Not(Exists) ({})", filter, properties.get(0));
    } else if (filter instanceof IsNotNull) {
        final IsNotNull isNotNull = (IsNotNull) filter;
        final FilterFunction exists = new Exists();
        final List<String> properties = Collections.singletonList(isNotNull.attribute());
        final Set<String> relevantGroups = getGroupsFromFilter(filter);
        if (relevantGroups != null) {
            for (final String group : relevantGroups) {
                if (!map.containsKey(group)) {
                    map.put(group, new ArrayList<ConsumerFunctionContext<String, FilterFunction>>());
                }
                map.get(group).add(new ConsumerFunctionContext<>(exists, properties));
            }
        }
        LOGGER.debug("Converted {} to Exists ({})", filter, properties.get(0));
    } else if (filter instanceof And) {
        final And and = (And) filter;
        final Map<String, List<ConsumerFunctionContext<String, FilterFunction>>> left = getFunctionsFromFilter(and.left());
        final Map<String, List<ConsumerFunctionContext<String, FilterFunction>>> right = getFunctionsFromFilter(and.right());
        final Set<String> relevantGroups = getGroupsFromFilter(filter);
        if (relevantGroups != null) {
            for (final String group : relevantGroups) {
                final List<ConsumerFunctionContext<String, FilterFunction>> concatFilters = new ArrayList<>();
                if (left.get(group) != null) {
                    concatFilters.addAll(left.get(group));
                }
                if (right.get(group) != null) {
                    concatFilters.addAll(right.get(group));
                }
                if (!map.containsKey(group)) {
                    map.put(group, new ArrayList<ConsumerFunctionContext<String, FilterFunction>>());
                }
                map.get(group).addAll(concatFilters);
            }
        }
        LOGGER.debug("Converted {} to list of filters ({})", filter, StringUtils.join(map.entrySet(), ','));
    }
    return map;
}