diff options
author | rsgowman <rgowman@google.com> | 2018-07-13 16:22:07 -0400 |
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committer | GitHub <noreply@github.com> | 2018-07-13 16:22:07 -0400 |
commit | 920cfbfa998ca9d04cce5f7731aced7e950a3477 (patch) | |
tree | 76f62fa05240d533477707bb4cd26df6808cd523 /Firestore/core/src/firebase/firestore/core/filter.h | |
parent | 81ec26d4ff2f9cc295bf057167a649a34a7a11aa (diff) |
Initial (incomplete) implementation of f:f:core::Filter (#1495)
And RelationFilter subclass.
Used to implement the next step in core::Query.
Diffstat (limited to 'Firestore/core/src/firebase/firestore/core/filter.h')
-rw-r--r-- | Firestore/core/src/firebase/firestore/core/filter.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/Firestore/core/src/firebase/firestore/core/filter.h b/Firestore/core/src/firebase/firestore/core/filter.h new file mode 100644 index 0000000..9f25a39 --- /dev/null +++ b/Firestore/core/src/firebase/firestore/core/filter.h @@ -0,0 +1,70 @@ +/* + * Copyright 2018 Google + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_CORE_FILTER_H_ +#define FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_CORE_FILTER_H_ + +#include <memory> +#include <string> + +#include "Firestore/core/src/firebase/firestore/model/document.h" +#include "Firestore/core/src/firebase/firestore/model/field_path.h" +#include "Firestore/core/src/firebase/firestore/model/field_value.h" + +namespace firebase { +namespace firestore { +namespace core { + +/** Interface used for all query filters. All filters are immutable. */ +class Filter { + public: + enum class Operator { + LessThan, + LessThanOrEqual, + Equal, + GreaterThan, + GreaterThanOrEqual, + }; + + /** + * Creates a Filter instance for the provided path, operator, and value. + * + * Note that if the relational operator is Equal and the value is NullValue or + * NaN, then this will return the appropriate NullFilter or NaNFilter class + * instead of a RelationFilter. + */ + static std::shared_ptr<Filter> Create(model::FieldPath path, + Operator op, + model::FieldValue value); + + virtual ~Filter() { + } + + /** Returns the field the Filter operates over. */ + virtual const model::FieldPath& field() const = 0; + + /** Returns true if a document matches the filter. */ + virtual bool Matches(const model::Document& doc) const = 0; + + /** A unique ID identifying the filter; used when serializing queries. */ + virtual std::string CanonicalId() const = 0; +}; + +} // namespace core +} // namespace firestore +} // namespace firebase + +#endif // FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_CORE_FILTER_H_ |