Examples with FilterExpression com.yahoo.elide.core.filter.expression.FilterExpression used on opensource projects

Example 16 with FilterExpression

use of com.yahoo.elide.core.filter.expression.FilterExpression in project elide by yahoo.

the class DefaultQueryValidator method validateWhereClause.

@Override
public void validateWhereClause(Query query) {
    FilterExpression whereClause = query.getWhereFilter();
    if (whereClause == null) {
        return;
    }
    whereClause.accept(new PredicateExtractionVisitor()).forEach(predicate -> {
        Path path = predicate.getPath();
        if (path.getPathElements().size() > 1) {
            throw new InvalidOperationException("Relationship traversal not supported for analytic queries.");
        }
        validatePredicate(query, predicate);
    });
}

Example 17 with FilterExpression

use of com.yahoo.elide.core.filter.expression.FilterExpression in project elide by yahoo.

the class EntityProjectionTranslator method splitFilters.

/**
 * Gets whereFilter and havingFilter based on provided filter expression from {@link EntityProjection}.
 */
private void splitFilters() {
    FilterExpression filterExpression = entityProjection.getFilterExpression();
    if (filterExpression == null) {
        whereFilter = null;
        havingFilter = null;
        return;
    }
    SplitFilterExpressionVisitor visitor = new SplitFilterExpressionVisitor(queriedTable);
    FilterConstraints constraints = filterExpression.accept(visitor);
    whereFilter = constraints.getWhereExpression();
    havingFilter = constraints.getHavingExpression();
}

Example 18 with FilterExpression

use of com.yahoo.elide.core.filter.expression.FilterExpression in project elide by yahoo.

the class Queryable method getFilterProjections.

default List<ColumnProjection> getFilterProjections(FilterExpression expression) {
    List<ColumnProjection> results = new ArrayList<>();
    if (expression == null) {
        return results;
    }
    Collection<FilterPredicate> predicates = expression.accept(new PredicateExtractionVisitor());
    predicates.stream().forEach((predicate -> {
        Map<String, Argument> arguments = new HashMap<>();
        predicate.getPath().lastElement().get().getArguments().forEach(argument -> arguments.put(argument.getName(), argument));
        ColumnProjection projection = getSource().getColumnProjection(predicate.getField(), arguments);
        results.add(projection);
    }));
    return results;
}

Example 19 with FilterExpression

use of com.yahoo.elide.core.filter.expression.FilterExpression in project elide by yahoo.

the class Queryable method extractFilterProjections.

/**
 * Converts a filter expression into a set of ColumnProjections.
 * @param query The parent query.
 * @param expression The filter expression to extract.
 * @return A set of zero or more column projections with their arguments.
 */
static Set<ColumnProjection> extractFilterProjections(Queryable query, FilterExpression expression) {
    if (expression == null) {
        return new LinkedHashSet<>();
    }
    Collection<FilterPredicate> predicates = expression.accept(new PredicateExtractionVisitor());
    Set<ColumnProjection> filterProjections = new LinkedHashSet<>();
    predicates.stream().forEach((predicate -> {
        Map<String, Argument> arguments = new HashMap<>();
        predicate.getPath().lastElement().get().getArguments().forEach(argument -> arguments.put(argument.getName(), argument));
        ColumnProjection projection = query.getSource().getColumnProjection(predicate.getField(), arguments);
        if (projection != null) {
            filterProjections.add(projection);
        }
    }));
    return filterProjections;
}

Example 20 with FilterExpression

use of com.yahoo.elide.core.filter.expression.FilterExpression in project elide by yahoo.

the class FilteredIteratorTest method testFilteredResult.

@Test
public void testFilteredResult() throws Exception {
    EntityDictionary dictionary = EntityDictionary.builder().build();
    dictionary.bindEntity(Book.class);
    Book book1 = new Book();
    book1.setTitle("foo");
    Book book2 = new Book();
    book2.setTitle("bar");
    Book book3 = new Book();
    book3.setTitle("foobar");
    List<Book> books = List.of(book1, book2, book3);
    RSQLFilterDialect filterDialect = RSQLFilterDialect.builder().dictionary(dictionary).build();
    FilterExpression expression = filterDialect.parse(ClassType.of(Book.class), new HashSet<>(), "title==*bar", NO_VERSION);
    RequestScope scope = new TestRequestScope(null, null, dictionary);
    Iterator<Book> bookIterator = new FilteredIterator<>(expression, scope, books.iterator());
    assertTrue(bookIterator.hasNext());
    assertEquals("bar", bookIterator.next().getTitle());
    assertTrue(bookIterator.hasNext());
    assertEquals("foobar", bookIterator.next().getTitle());
    assertFalse(bookIterator.hasNext());
}