Examples with ComponentWithNoChildren com.apple.foundationdb.record.query.expressions.ComponentWithNoChildren used on opensource projects

Example 1 with ComponentWithNoChildren

use of com.apple.foundationdb.record.query.expressions.ComponentWithNoChildren in project fdb-record-layer by FoundationDB.

the class InExtractor method mapClauses.

private QueryComponent mapClauses(QueryComponent filter, BiFunction<ComponentWithComparison, List<FieldKeyExpression>, QueryComponent> mapper, @Nullable List<FieldKeyExpression> fields) {
    if (filter instanceof ComponentWithComparison) {
        final ComponentWithComparison withComparison = (ComponentWithComparison) filter;
        return mapper.apply(withComparison, fields);
    } else if (filter instanceof ComponentWithChildren) {
        ComponentWithChildren componentWithChildren = (ComponentWithChildren) filter;
        return componentWithChildren.withOtherChildren(componentWithChildren.getChildren().stream().map(component -> mapClauses(component, mapper, fields)).collect(Collectors.toList()));
    } else if (filter instanceof ComponentWithSingleChild) {
        ComponentWithSingleChild componentWithSingleChild = (ComponentWithSingleChild) filter;
        List<FieldKeyExpression> nestedFields = null;
        if (fields != null && (componentWithSingleChild instanceof NestedField || componentWithSingleChild instanceof OneOfThemWithComponent)) {
            nestedFields = new ArrayList<>(fields);
            nestedFields.add(Key.Expressions.field(((BaseField) componentWithSingleChild).getFieldName(), componentWithSingleChild instanceof NestedField ? KeyExpression.FanType.None : KeyExpression.FanType.FanOut));
        }
        return componentWithSingleChild.withOtherChild(mapClauses(componentWithSingleChild.getChild(), mapper, nestedFields));
    } else if (filter instanceof ComponentWithNoChildren) {
        return filter;
    } else {
        throw new Query.InvalidExpressionException("Unsupported query type " + filter.getClass());
    }
}