use of uk.gov.gchq.koryphe.impl.predicate.Exists 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 TupleAdaptedPredicate}s.
* <p>
* Note that Spark also applies all the filters provided to the {@code buildScan(String[], Filter[])} 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 TupleAdaptedPredicate}s implementing the provided {@link Filter}.
*/
private Map<String, List<TupleAdaptedPredicate<String, ?>>> getFunctionsFromFilter(final Filter filter) {
final Map<String, List<TupleAdaptedPredicate<String, ?>>> map = new HashMap<>();
if (filter instanceof EqualTo) {
// Not dealt with as requires a Predicate<?> that returns null if either the controlValue or the
// test value is null - the API of Predicate<?> doesn't permit this.
} else if (filter instanceof EqualNullSafe) {
final EqualNullSafe equalNullSafe = (EqualNullSafe) filter;
final Predicate<?> isEqual = new IsEqual(equalNullSafe.value());
final Set<String> relevantGroups = getGroupsFromFilter(filter);
if (null != relevantGroups) {
for (final String group : relevantGroups) {
if (!map.containsKey(group)) {
map.put(group, new ArrayList<>());
}
map.get(group).add(new TupleAdaptedPredicate<>(isEqual, new String[] { equalNullSafe.attribute() }));
}
}
LOGGER.debug("Converted {} to IsEqual ({})", filter, equalNullSafe.attribute());
} else if (filter instanceof GreaterThan) {
final GreaterThan greaterThan = (GreaterThan) filter;
final Predicate<?> isMoreThan = new IsMoreThan((Comparable<?>) greaterThan.value(), false);
final Set<String> relevantGroups = getGroupsFromFilter(filter);
if (null != relevantGroups) {
for (final String group : relevantGroups) {
if (!map.containsKey(group)) {
map.put(group, new ArrayList<>());
}
map.get(group).add(new TupleAdaptedPredicate<>(isMoreThan, new String[] { greaterThan.attribute() }));
}
}
LOGGER.debug("Converted {} to isMoreThan ({})", filter, greaterThan.attribute());
} else if (filter instanceof GreaterThanOrEqual) {
final GreaterThanOrEqual greaterThan = (GreaterThanOrEqual) filter;
final Predicate<?> isMoreThan = new IsMoreThan((Comparable<?>) greaterThan.value(), true);
final Set<String> relevantGroups = getGroupsFromFilter(filter);
if (null != relevantGroups) {
for (final String group : relevantGroups) {
if (!map.containsKey(group)) {
map.put(group, new ArrayList<>());
}
map.get(group).add(new TupleAdaptedPredicate<>(isMoreThan, new String[] { greaterThan.attribute() }));
}
}
LOGGER.debug("Converted {} to IsMoreThan ({})", filter, greaterThan.attribute());
} else if (filter instanceof LessThan) {
final LessThan lessThan = (LessThan) filter;
final Predicate<?> isLessThan = new IsLessThan((Comparable<?>) lessThan.value(), false);
final Set<String> relevantGroups = getGroupsFromFilter(filter);
if (null != relevantGroups) {
for (final String group : relevantGroups) {
if (!map.containsKey(group)) {
map.put(group, new ArrayList<>());
}
map.get(group).add(new TupleAdaptedPredicate<>(isLessThan, new String[] { lessThan.attribute() }));
}
}
LOGGER.debug("Converted {} to IsLessThan ({})", filter, lessThan.attribute());
} else if (filter instanceof LessThanOrEqual) {
final LessThanOrEqual lessThan = (LessThanOrEqual) filter;
final Predicate<?> isLessThan = new IsLessThan((Comparable<?>) lessThan.value(), true);
final Set<String> relevantGroups = getGroupsFromFilter(filter);
if (null != relevantGroups) {
for (final String group : relevantGroups) {
if (!map.containsKey(group)) {
map.put(group, new ArrayList<>());
}
map.get(group).add(new TupleAdaptedPredicate<>(isLessThan, new String[] { lessThan.attribute() }));
}
}
LOGGER.debug("Converted {} to LessThanOrEqual ({})", filter, lessThan.attribute());
} else if (filter instanceof In) {
final In in = (In) filter;
final Predicate<?> isIn = new IsIn(new HashSet<>(Arrays.asList(in.values())));
final Set<String> relevantGroups = getGroupsFromFilter(filter);
if (null != relevantGroups) {
for (final String group : relevantGroups) {
if (!map.containsKey(group)) {
map.put(group, new ArrayList<>());
}
map.get(group).add(new TupleAdaptedPredicate<>(isIn, new String[] { in.attribute() }));
}
}
LOGGER.debug("Converted {} to IsIn ({})", filter, in.attribute());
} else if (filter instanceof IsNull) {
final IsNull isNull = (IsNull) filter;
final Predicate<?> doesntExist = new Not<>(new Exists());
final Set<String> relevantGroups = getGroupsFromFilter(filter);
if (null != relevantGroups) {
for (final String group : relevantGroups) {
if (!map.containsKey(group)) {
map.put(group, new ArrayList<>());
}
map.get(group).add(new TupleAdaptedPredicate<>(doesntExist, new String[] { isNull.attribute() }));
}
}
LOGGER.debug("Converted {} to Not(Exists) ({})", filter, isNull.attribute());
} else if (filter instanceof IsNotNull) {
final IsNotNull isNotNull = (IsNotNull) filter;
final Predicate<?> exists = new Exists();
final Set<String> relevantGroups = getGroupsFromFilter(filter);
if (null != relevantGroups) {
for (final String group : relevantGroups) {
if (!map.containsKey(group)) {
map.put(group, new ArrayList<>());
}
map.get(group).add(new TupleAdaptedPredicate<>(exists, new String[] { isNotNull.attribute() }));
}
}
LOGGER.debug("Converted {} to Exists ({})", filter, isNotNull.attribute());
} else if (filter instanceof And) {
final And and = (And) filter;
final Map<String, List<TupleAdaptedPredicate<String, ?>>> left = getFunctionsFromFilter(and.left());
final Map<String, List<TupleAdaptedPredicate<String, ?>>> right = getFunctionsFromFilter(and.right());
final Set<String> relevantGroups = getGroupsFromFilter(filter);
if (null != relevantGroups) {
for (final String group : relevantGroups) {
final List<TupleAdaptedPredicate<String, ?>> concatFilters = new ArrayList<>();
if (null != left.get(group)) {
concatFilters.addAll(left.get(group));
}
if (null != right.get(group)) {
concatFilters.addAll(right.get(group));
}
if (!map.containsKey(group)) {
map.put(group, new ArrayList<>());
}
map.get(group).addAll(concatFilters);
}
}
LOGGER.debug("Converted {} to list of filters ({})", filter, StringUtils.join(map.entrySet(), ','));
}
return map;
}
use of uk.gov.gchq.koryphe.impl.predicate.Exists in project Gaffer by gchq.
the class AbstractCoreKeyIteratorSettingsFactoryTest method shouldReturnNullPostAggFilterIfNoPreAggFilters.
@Test
public void shouldReturnNullPostAggFilterIfNoPreAggFilters() throws Exception {
// Given
final AccumuloStore store = mock(AccumuloStore.class);
final Schema schema = createSchema();
final View view = new View.Builder().edge(TestGroups.EDGE, new ViewElementDefinition.Builder().preAggregationFilter(new ElementFilter.Builder().select(TestPropertyNames.PROP_1).execute(new Exists()).build()).build()).build();
given(store.getSchema()).willReturn(schema);
// When
final IteratorSetting iterator = factory.getElementPostAggregationFilterIteratorSetting(view, store);
// Then
assertNull(iterator);
}
use of uk.gov.gchq.koryphe.impl.predicate.Exists in project Gaffer by gchq.
the class AbstractCoreKeyIteratorSettingsFactoryTest method shouldReturnPostAggFilterIterator.
@Test
public void shouldReturnPostAggFilterIterator() throws Exception {
// Given
final AccumuloStore store = mock(AccumuloStore.class);
final Schema schema = createSchema();
final View view = new View.Builder().edge(TestGroups.EDGE, new ViewElementDefinition.Builder().postAggregationFilter(new ElementFilter.Builder().select(TestPropertyNames.PROP_1).execute(new Exists()).build()).build()).build();
final AccumuloKeyPackage keyPackage = mock(AccumuloKeyPackage.class);
final AccumuloElementConverter converter = mock(AccumuloElementConverter.class);
given(store.getSchema()).willReturn(schema);
given(store.getKeyPackage()).willReturn(keyPackage);
given(keyPackage.getKeyConverter()).willReturn(converter);
// When
final IteratorSetting iterator = factory.getElementPostAggregationFilterIteratorSetting(view, store);
// Then
assertEquals(AccumuloStoreConstants.ELEMENT_POST_AGGREGATION_FILTER_ITERATOR_NAME, iterator.getName());
assertEquals(AccumuloStoreConstants.ELEMENT_POST_AGGREGATION_FILTER_ITERATOR_PRIORITY, iterator.getPriority());
assertEquals(ElementPostAggregationFilter.class.getName(), iterator.getIteratorClass());
JsonAssert.assertEquals(schema.toCompactJson(), iterator.getOptions().get(AccumuloStoreConstants.SCHEMA).getBytes());
JsonAssert.assertEquals(view.toCompactJson(), iterator.getOptions().get(AccumuloStoreConstants.VIEW).getBytes());
assertEquals(converter.getClass().getName(), iterator.getOptions().get(AccumuloStoreConstants.ACCUMULO_ELEMENT_CONVERTER_CLASS));
}
use of uk.gov.gchq.koryphe.impl.predicate.Exists in project Gaffer by gchq.
the class ViewTest method shouldAddGlobalPostTransformFiltersToGroup.
@Test
public void shouldAddGlobalPostTransformFiltersToGroup() {
// Given
final ElementFilter filter = new ElementFilter.Builder().select(TestPropertyNames.PROP_1).execute(new Exists()).build();
final View view = new View.Builder().globalEntities(new GlobalViewElementDefinition.Builder().groups(TestGroups.ENTITY).postTransformFilter(filter).build()).entity(TestGroups.ENTITY).build();
// When
view.expandGlobalDefinitions();
// Then
assertTrue(view.hasPostTransformFilters());
assertEquals(Exists.class.getSimpleName(), view.getEntity(TestGroups.ENTITY).getPostTransformFilter().getComponents().get(0).getPredicate().getClass().getSimpleName());
}
use of uk.gov.gchq.koryphe.impl.predicate.Exists in project Gaffer by gchq.
the class ViewTest method shouldReturnTrueWhenViewHasPostTransformEdgeFilters.
@Test
public void shouldReturnTrueWhenViewHasPostTransformEdgeFilters() {
// Given
final View view = new View.Builder().entity(TestGroups.ENTITY).edge(TestGroups.EDGE, new ViewElementDefinition.Builder().postTransformFilter(new ElementFilter.Builder().select(TestPropertyNames.PROP_1).execute(new Exists()).build()).build()).edge(TestGroups.EDGE_2, null).build();
// When
final boolean result = view.hasPostTransformFilters();
// Then
assertTrue(result);
}
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