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-rw-r--r--include/mbgl/style/conversion/filter.hpp243
1 files changed, 1 insertions, 242 deletions
diff --git a/include/mbgl/style/conversion/filter.hpp b/include/mbgl/style/conversion/filter.hpp
index 986d1bf80d..9daf6ea7a4 100644
--- a/include/mbgl/style/conversion/filter.hpp
+++ b/include/mbgl/style/conversion/filter.hpp
@@ -2,7 +2,6 @@
#include <mbgl/style/filter.hpp>
#include <mbgl/style/conversion.hpp>
-#include <mbgl/util/geometry.hpp>
namespace mbgl {
namespace style {
@@ -11,247 +10,7 @@ namespace conversion {
template <>
struct Converter<Filter> {
public:
- template <class V>
- optional<Filter> operator()(const V& value, Error& error) const {
- if (!isArray(value)) {
- error = { "filter expression must be an array" };
- return {};
- }
-
- if (arrayLength(value) < 1) {
- error = { "filter expression must have at least 1 element" };
- return {};
- }
-
- optional<std::string> op = toString(arrayMember(value, 0));
- if (!op) {
- error = { "filter operator must be a string" };
- return {};
- }
-
- if (*op == "==") {
- return convertEqualityFilter<EqualsFilter, TypeEqualsFilter, IdentifierEqualsFilter>(value, error);
- } else if (*op == "!=") {
- return convertEqualityFilter<NotEqualsFilter, TypeNotEqualsFilter, IdentifierNotEqualsFilter>(value, error);
- } else if (*op == ">") {
- return convertBinaryFilter<GreaterThanFilter>(value, error);
- } else if (*op == ">=") {
- return convertBinaryFilter<GreaterThanEqualsFilter>(value, error);
- } else if (*op == "<") {
- return convertBinaryFilter<LessThanFilter>(value, error);
- } else if (*op == "<=") {
- return convertBinaryFilter<LessThanEqualsFilter>(value, error);
- } else if (*op == "in") {
- return convertSetFilter<InFilter, TypeInFilter, IdentifierInFilter>(value, error);
- } else if (*op == "!in") {
- return convertSetFilter<NotInFilter, TypeNotInFilter, IdentifierNotInFilter>(value, error);
- } else if (*op == "all") {
- return convertCompoundFilter<AllFilter>(value, error);
- } else if (*op == "any") {
- return convertCompoundFilter<AnyFilter>(value, error);
- } else if (*op == "none") {
- return convertCompoundFilter<NoneFilter>(value, error);
- } else if (*op == "has") {
- return convertUnaryFilter<HasFilter, HasIdentifierFilter>(value, error);
- } else if (*op == "!has") {
- return convertUnaryFilter<NotHasFilter, NotHasIdentifierFilter>(value, error);
- }
-
- error = { R"(filter operator must be one of "==", "!=", ">", ">=", "<", "<=", "in", "!in", "all", "any", "none", "has", or "!has")" };
- return {};
- }
-
-private:
- optional<Value> normalizeValue(const optional<Value>& value, Error& error) const {
- if (!value) {
- error = { "filter expression value must be a boolean, number, or string" };
- return {};
- } else {
- return *value;
- }
- }
-
- template <class V>
- optional<FeatureType> toFeatureType(const V& value, Error& error) const {
- optional<std::string> type = toString(value);
- if (!type) {
- error = { "value for $type filter must be a string" };
- return {};
- } else if (*type == "Point") {
- return FeatureType::Point;
- } else if (*type == "LineString") {
- return FeatureType::LineString;
- } else if (*type == "Polygon") {
- return FeatureType::Polygon;
- } else {
- error = { "value for $type filter must be Point, LineString, or Polygon" };
- return {};
- }
- }
-
- template <class V>
- optional<FeatureIdentifier> toFeatureIdentifier(const V& value, Error& error) const {
- optional<Value> identifier = toValue(value);
- if (!identifier) {
- error = { "filter expression value must be a boolean, number, or string" };
- return {};
- } else {
- return (*identifier).match(
- [] (uint64_t t) -> optional<FeatureIdentifier> { return { t }; },
- [] ( int64_t t) -> optional<FeatureIdentifier> { return { t }; },
- [] ( double t) -> optional<FeatureIdentifier> { return { t }; },
- [] (const std::string& t) -> optional<FeatureIdentifier> { return { t }; },
- [&] (const auto&) -> optional<FeatureIdentifier> {
- error = { "filter expression value must be a boolean, number, or string" };
- return {};
- });
- }
- }
-
- template <class FilterType, class IdentifierFilterType, class V>
- optional<Filter> convertUnaryFilter(const V& value, Error& error) const {
- if (arrayLength(value) < 2) {
- error = { "filter expression must have 2 elements" };
- return {};
- }
-
- optional<std::string> key = toString(arrayMember(value, 1));
- if (!key) {
- error = { "filter expression key must be a string" };
- return {};
- }
-
- if (*key == "$id") {
- return { IdentifierFilterType {} };
- } else {
- return { FilterType { *key } };
- }
- }
-
- template <class FilterType, class TypeFilterType, class IdentifierFilterType, class V>
- optional<Filter> convertEqualityFilter(const V& value, Error& error) const {
- if (arrayLength(value) < 3) {
- error = { "filter expression must have 3 elements" };
- return {};
- }
-
- optional<std::string> key = toString(arrayMember(value, 1));
- if (!key) {
- error = { "filter expression key must be a string" };
- return {};
- }
-
- if (*key == "$type") {
- optional<FeatureType> filterValue = toFeatureType(arrayMember(value, 2), error);
- if (!filterValue) {
- return {};
- }
-
- return { TypeFilterType { *filterValue } };
-
- } else if (*key == "$id") {
- optional<FeatureIdentifier> filterValue = toFeatureIdentifier(arrayMember(value, 2), error);
- if (!filterValue) {
- return {};
- }
-
- return { IdentifierFilterType { *filterValue } };
-
- } else {
- optional<Value> filterValue = normalizeValue(toValue(arrayMember(value, 2)), error);
- if (!filterValue) {
- return {};
- }
-
- return { FilterType { *key, *filterValue } };
- }
- }
-
- template <class FilterType, class V>
- optional<Filter> convertBinaryFilter(const V& value, Error& error) const {
- if (arrayLength(value) < 3) {
- error = { "filter expression must have 3 elements" };
- return {};
- }
-
- optional<std::string> key = toString(arrayMember(value, 1));
- if (!key) {
- error = { "filter expression key must be a string" };
- return {};
- }
-
- optional<Value> filterValue = normalizeValue(toValue(arrayMember(value, 2)), error);
- if (!filterValue) {
- return {};
- }
-
- return { FilterType { *key, *filterValue } };
- }
-
- template <class FilterType, class TypeFilterType, class IdentifierFilterType, class V>
- optional<Filter> convertSetFilter(const V& value, Error& error) const {
- if (arrayLength(value) < 2) {
- error = { "filter expression must at least 2 elements" };
- return {};
- }
-
- optional<std::string> key = toString(arrayMember(value, 1));
- if (!key) {
- error = { "filter expression key must be a string" };
- return {};
- }
-
- if (*key == "$type") {
- std::vector<FeatureType> values;
- for (std::size_t i = 2; i < arrayLength(value); ++i) {
- optional<FeatureType> filterValue = toFeatureType(arrayMember(value, i), error);
- if (!filterValue) {
- return {};
- }
- values.push_back(*filterValue);
- }
-
- return { TypeFilterType { std::move(values) } };
-
- } else if (*key == "$id") {
- std::vector<FeatureIdentifier> values;
- for (std::size_t i = 2; i < arrayLength(value); ++i) {
- optional<FeatureIdentifier> filterValue = toFeatureIdentifier(arrayMember(value, i), error);
- if (!filterValue) {
- return {};
- }
- values.push_back(*filterValue);
- }
-
- return { IdentifierFilterType { std::move(values) } };
-
- } else {
- std::vector<Value> values;
- for (std::size_t i = 2; i < arrayLength(value); ++i) {
- optional<Value> filterValue = normalizeValue(toValue(arrayMember(value, i)), error);
- if (!filterValue) {
- return {};
- }
- values.push_back(*filterValue);
- }
-
- return { FilterType { *key, std::move(values) } };
- }
- }
-
- template <class FilterType, class V>
- optional<Filter> convertCompoundFilter(const V& value, Error& error) const {
- std::vector<Filter> filters;
- for (std::size_t i = 1; i < arrayLength(value); ++i) {
- optional<Filter> element = operator()(arrayMember(value, i), error);
- if (!element) {
- return {};
- }
- filters.push_back(*element);
- }
-
- return { FilterType { std::move(filters) } };
- }
+ optional<Filter> operator()(const Convertible& value, Error& error) const;
};
} // namespace conversion
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