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…he#38189) ### Rationale for this change In support of adding an [`arrow.array.ListArray`](apache#37815) MATLAB class, this pull request adds a new `arrow.type.ListType` MATLAB class. ### What changes are included in this PR? 1. New `arrow.list(<type>)` MATLAB construction function. 2. New `arrow.list.ListType` MATLAB class. `ListType` has a property named `Type` which indicates the inner type of the `List`. `Type` can be set to any subclass `arrow.type.Type` (including `arrow.type.ListType`, to support nested lists). 3. New `arrow.type.ID.List` type ID enumeration value. 4. New `arrow.type.traits.ListTraits` type traits class. Some of the properties, such as `ArrayConstructor` and `ArrayProxyClassName`, are set to `missing` because they are dependent on adding [`arrow.array.ListArray`](apache#37815) first. **Example** ```matlab % Create a simple List<String> type. >> stringListType = arrow.list(arrow.string()) stringListType = ListType with properties: ID: List Type: [1x1 arrow.type.StringType] % Create a nested List<List<Boolean>> type. >> nestedListType = arrow.list(arrow.list(arrow.boolean())) nestedListType = ListType with properties: ID: List Type: [1x1 arrow.type.ListType] % Extract the first-level, inner type, which is List<Boolean>. >> innerType = nestedListType.Type innerType = ListType with properties: ID: List Type: [1x1 arrow.type.BooleanType] % Extract the second-level, nested inner type, which is Boolean. >> innerType.Type ans = BooleanType with properties: ID: Boolean ``` ### Are these changes tested? Yes. 1. Added `tListType.m`. 2. Added `tListTraits.m`. 3. Updated `tField.m` to include `arrow.list`. 4. Updated `tID.m` to include `arrow.type.ID.List`. 6. Updated `tTypeDisplay.m` to include `arrow.type.ListType`. 7. Updated `ttraits.m` to include `arrow.type.traits.ListTraits`. ### Are there any user-facing changes? Yes. Client MATLAB code can now creates instances of `arrow.type.ListType` by using the `arrow.list(<type>)` construction function. ### Future Directions 1. apache#37815 * Closes: apache#37812 Authored-by: Kevin Gurney <[email protected]> Signed-off-by: Kevin Gurney <[email protected]>
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| // Licensed to the Apache Software Foundation (ASF) under one | ||
| // or more contributor license agreements. See the NOTICE file | ||
| // distributed with this work for additional information | ||
| // regarding copyright ownership. The ASF licenses this file | ||
| // to you 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. | ||
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| #include "arrow/matlab/type/proxy/list_type.h" | ||
| #include "arrow/matlab/type/proxy/wrap.h" | ||
| #include "libmexclass/proxy/ProxyManager.h" | ||
| #include "arrow/matlab/error/error.h" | ||
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| namespace arrow::matlab::type::proxy { | ||
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| ListType::ListType(std::shared_ptr<arrow::ListType> list_type) : Type(std::move(list_type)) { | ||
| REGISTER_METHOD(ListType, getValueType); | ||
| } | ||
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| void ListType::getValueType(libmexclass::proxy::method::Context& context) { | ||
| namespace mda = ::matlab::data; | ||
| mda::ArrayFactory factory; | ||
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| const auto list_type = std::static_pointer_cast<arrow::ListType>(data_type); | ||
| const auto value_type = list_type->value_type(); | ||
| const auto value_type_id = static_cast<int32_t>(value_type->id()); | ||
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| MATLAB_ASSIGN_OR_ERROR_WITH_CONTEXT(auto value_type_proxy, | ||
| type::proxy::wrap(value_type), | ||
| context, | ||
| error::LIST_TYPE_FAILED_TO_CREATE_VALUE_TYPE_PROXY); | ||
| const auto value_type_proxy_id = libmexclass::proxy::ProxyManager::manageProxy(value_type_proxy); | ||
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| mda::StructArray output = factory.createStructArray({1, 1}, {"ValueTypeProxyID", "ValueTypeID"}); | ||
| output[0]["ValueTypeProxyID"] = factory.createScalar(value_type_proxy_id); | ||
| output[0]["ValueTypeID"] = factory.createScalar(value_type_id); | ||
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| context.outputs[0] = output; | ||
| } | ||
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| libmexclass::proxy::MakeResult ListType::make(const libmexclass::proxy::FunctionArguments& constructor_arguments) { | ||
| namespace mda = ::matlab::data; | ||
| using namespace libmexclass::proxy; | ||
| using ListTypeProxy = arrow::matlab::type::proxy::ListType; | ||
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| mda::StructArray args = constructor_arguments[0]; | ||
| const mda::TypedArray<uint64_t> value_type_proxy_id_mda = args[0]["ValueTypeProxyID"]; | ||
| const auto value_type_proxy_id = value_type_proxy_id_mda[0]; | ||
| const auto proxy = ProxyManager::getProxy(value_type_proxy_id); | ||
| const auto value_type_proxy = std::static_pointer_cast<type::proxy::Type>(proxy); | ||
| const auto value_type = value_type_proxy->unwrap(); | ||
| const auto list_type = std::static_pointer_cast<arrow::ListType>(arrow::list(value_type)); | ||
| return std::make_shared<ListTypeProxy>(std::move(list_type)); | ||
| } | ||
| } |
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| // Licensed to the Apache Software Foundation (ASF) under one | ||
| // or more contributor license agreements. See the NOTICE file | ||
| // distributed with this work for additional information | ||
| // regarding copyright ownership. The ASF licenses this file | ||
| // to you 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. | ||
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| #pragma once | ||
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| #include "arrow/matlab/type/proxy/type.h" | ||
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| namespace arrow::matlab::type::proxy { | ||
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| class ListType : public arrow::matlab::type::proxy::Type { | ||
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| public: | ||
| ListType(std::shared_ptr<arrow::ListType> list_type); | ||
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| ~ListType() {} | ||
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| void getValueType(libmexclass::proxy::method::Context& context); | ||
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| static libmexclass::proxy::MakeResult make(const libmexclass::proxy::FunctionArguments& constructor_arguments); | ||
| }; | ||
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| } |
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|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| % Licensed to the Apache Software Foundation (ASF) under one or more | ||
| % contributor license agreements. See the NOTICE file distributed with | ||
| % this work for additional information regarding copyright ownership. | ||
| % The ASF licenses this file to you 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. | ||
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| classdef ListTraits < arrow.type.traits.TypeTraits | ||
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| properties (Constant) | ||
| ArrayConstructor = missing | ||
| ArrayClassName = missing | ||
| ArrayProxyClassName = missing | ||
| ArrayStaticConstructor = missing | ||
| TypeConstructor = @arrow.type.ListType | ||
| TypeClassName = "arrow.type.ListType" | ||
| TypeProxyClassName = "arrow.type.proxy.ListType" | ||
| MatlabConstructor = missing | ||
| MatlabClassName = missing | ||
| end | ||
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| end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| % Licensed to the Apache Software Foundation (ASF) under one or more | ||
| % contributor license agreements. See the NOTICE file distributed with | ||
| % this work for additional information regarding copyright ownership. | ||
| % The ASF licenses this file to you 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. | ||
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| classdef ListType < arrow.type.Type | ||
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| properties (Dependent, GetAccess=public, SetAccess=private) | ||
| % The inner element type T of the List<T>. | ||
| % For example: for List<UInt64>, ValueType = UInt64. | ||
| ValueType | ||
| end | ||
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| methods | ||
| function obj = ListType(proxy) | ||
| arguments | ||
| proxy(1, 1) libmexclass.proxy.Proxy {validate(proxy, "arrow.type.proxy.ListType")} | ||
| end | ||
| import arrow.internal.proxy.validate | ||
| [email protected](proxy); | ||
| end | ||
| end | ||
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| methods(Access = protected) | ||
| function groups = getDisplayPropertyGroups(~) | ||
| targets = ["ID", "ValueType"]; | ||
| groups = matlab.mixin.util.PropertyGroup(targets); | ||
| end | ||
| end | ||
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| methods | ||
| function valueType = get.ValueType(obj) | ||
| valueTypeStruct = obj.Proxy.getValueType(); | ||
| traits = arrow.type.traits.traits(arrow.type.ID(valueTypeStruct.ValueTypeID)); | ||
| proxy = libmexclass.proxy.Proxy(Name=traits.TypeProxyClassName, ID=valueTypeStruct.ValueTypeProxyID); | ||
| valueType = traits.TypeConstructor(proxy); | ||
| end | ||
| end | ||
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| methods (Hidden) | ||
| function data = preallocateMATLABArray(~, numElements) | ||
| % Preallocate an empty cell array. | ||
| data = cell(numElements, 1); | ||
| end | ||
| end | ||
| end |
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| %LIST Creates an arrow.type.ListType object | ||
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| % Licensed to the Apache Software Foundation (ASF) under one or more | ||
| % contributor license agreements. See the NOTICE file distributed with | ||
| % this work for additional information regarding copyright ownership. | ||
| % The ASF licenses this file to you 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. | ||
| function listType = list(valueType) | ||
| arguments | ||
| valueType(1, 1) arrow.type.Type | ||
| end | ||
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| valueTypeProxyID = valueType.Proxy.ID; | ||
| args = struct(ValueTypeProxyID=valueTypeProxyID); | ||
| proxy = arrow.internal.proxy.create("arrow.type.proxy.ListType", args); | ||
| listType = arrow.type.ListType(proxy); | ||
| end |
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