GH-37597: [MATLAB] Add toMATLAB method to arrow.array.ChunkedArray class

matlab/src/matlab/+arrow/+array/ChunkedArray.m

@@ -60,6 +60,17 @@
             array = traits.ArrayConstructor(proxy);
         end
 
+        function data = toMATLAB(obj)
+            data = preallocateMATLABArray(obj.Type,  obj.Length);
+            startIndex = 1;
+            for ii = 1:obj.NumChunks
+                chunk = obj.chunk(ii);
+                endIndex = startIndex + chunk.Length - 1;
+                data(startIndex:endIndex) = toMATLAB(chunk);
+                startIndex = endIndex + 1;
+            end
+        end
+
         function tf = isequal(obj, varargin)
             narginchk(2, inf);
 

matlab/src/matlab/+arrow/+type/BooleanType.m

@@ -32,4 +32,10 @@
             groups = matlab.mixin.util.PropertyGroup(targets);
         end
     end
+
+    methods(Hidden)
+        function data = preallocateMATLABArray(~, length)
+            data = false([length 1]);
+        end
+    end
 end

matlab/src/matlab/+arrow/+type/DateType.m

@@ -42,4 +42,10 @@
         end
     end
 
+    methods(Hidden)
+        function data = preallocateMATLABArray(~, length)
+            data = NaT([length 1]);
+        end
+    end
+
 end

matlab/src/matlab/+arrow/+type/Float32Type.m

@@ -1,3 +1,5 @@
+%FLOAT32TYPE Type class for float32 data.
+
 % 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.
@@ -13,23 +15,15 @@
 % implied.  See the License for the specific language governing
 % permissions and limitations under the License.
 
-classdef Float32Type < arrow.type.FixedWidthType
-%FLOAT32TYPE Type class for float32 data.
+classdef Float32Type < arrow.type.NumericType
 
     methods 
         function obj = Float32Type(proxy)
             arguments
                 proxy(1, 1) libmexclass.proxy.Proxy {validate(proxy, "arrow.type.proxy.Float32Type")}
             end
             import arrow.internal.proxy.validate
-            obj@arrow.type.FixedWidthType(proxy);
-        end
-    end
-
-    methods (Access=protected)
-        function groups = getDisplayPropertyGroups(~)
-            targets = "ID";
-            groups = matlab.mixin.util.PropertyGroup(targets);
+            obj@arrow.type.NumericType(proxy);
         end
     end
 end

matlab/src/matlab/+arrow/+type/Float64Type.m

@@ -1,3 +1,5 @@
+%FLOAT64TYPE Type class for float64 data. 
+
 % 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.
@@ -13,23 +15,15 @@
 % implied.  See the License for the specific language governing
 % permissions and limitations under the License.
 
-classdef Float64Type < arrow.type.FixedWidthType
-%FLOAT64Type Type class for float64 data. 
+classdef Float64Type < arrow.type.NumericType
 
     methods 
         function obj = Float64Type(proxy)
             arguments
                 proxy(1, 1) libmexclass.proxy.Proxy {validate(proxy, "arrow.type.proxy.Float64Type")}
             end
             import arrow.internal.proxy.validate
-            obj@arrow.type.FixedWidthType(proxy);
-        end
-    end
-
-    methods (Access=protected)
-        function groups = getDisplayPropertyGroups(~)
-            targets = "ID";
-            groups = matlab.mixin.util.PropertyGroup(targets);
+            obj@arrow.type.NumericType(proxy);
         end
     end
 end

matlab/src/matlab/+arrow/+type/Int16Type.m

@@ -1,3 +1,5 @@
+%INT16TYPE Type class for int16 data. 
+
 % 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.
@@ -13,23 +15,15 @@
 % implied.  See the License for the specific language governing
 % permissions and limitations under the License.
 
-classdef Int16Type < arrow.type.FixedWidthType
-%INT16TYPE Type class for int8 data. 
+classdef Int16Type < arrow.type.NumericType
 
     methods 
         function obj = Int16Type(proxy)
             arguments
                 proxy(1, 1) libmexclass.proxy.Proxy {validate(proxy, "arrow.type.proxy.Int16Type")}
             end
             import arrow.internal.proxy.validate
-            obj@arrow.type.FixedWidthType(proxy);
-        end
-    end
-
-    methods (Access=protected)
-        function groups = getDisplayPropertyGroups(~)
-            targets = "ID";
-            groups = matlab.mixin.util.PropertyGroup(targets);
+            obj@arrow.type.NumericType(proxy);
         end
     end
 end

matlab/src/matlab/+arrow/+type/Int32Type.m

@@ -1,3 +1,5 @@
+%INT32TYPE Type class for int32 data.
+
 % 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.
@@ -13,23 +15,15 @@
 % implied.  See the License for the specific language governing
 % permissions and limitations under the License.
 
-classdef Int32Type < arrow.type.FixedWidthType
-%INT32TYPE Type class for int32 data.
+classdef Int32Type < arrow.type.NumericType
 
     methods 
         function obj = Int32Type(proxy)
             arguments
                 proxy(1, 1) libmexclass.proxy.Proxy {validate(proxy, "arrow.type.proxy.Int32Type")}
             end
             import arrow.internal.proxy.validate
-            obj@arrow.type.FixedWidthType(proxy);
-        end
-    end
-
-    methods (Access=protected)
-        function groups = getDisplayPropertyGroups(~)
-            targets = "ID";
-            groups = matlab.mixin.util.PropertyGroup(targets);
+            obj@arrow.type.NumericType(proxy);
         end
     end
 end

matlab/src/matlab/+arrow/+type/Int64Type.m

@@ -1,3 +1,5 @@
+%INT64TYPE Type class for int64 data.
+
 % 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.
@@ -13,23 +15,15 @@
 % implied.  See the License for the specific language governing
 % permissions and limitations under the License.
 
-classdef Int64Type < arrow.type.FixedWidthType
-%INT64TYPE Type class for int64 data.
+classdef Int64Type < arrow.type.NumericType
 
     methods 
         function obj = Int64Type(proxy)
             arguments
                 proxy(1, 1) libmexclass.proxy.Proxy {validate(proxy, "arrow.type.proxy.Int64Type")}
             end
             import arrow.internal.proxy.validate
-            obj@arrow.type.FixedWidthType(proxy);
-        end
-    end
-
-    methods (Access=protected)
-        function groups = getDisplayPropertyGroups(~)
-            targets = "ID";
-            groups = matlab.mixin.util.PropertyGroup(targets);
+            obj@arrow.type.NumericType(proxy);
         end
     end
 end

matlab/src/matlab/+arrow/+type/Int8Type.m

@@ -1,3 +1,5 @@
+%INT8TYPE Type class for int8 data. 
+
 % 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.
@@ -13,23 +15,15 @@
 % implied.  See the License for the specific language governing
 % permissions and limitations under the License.
 
-classdef Int8Type < arrow.type.FixedWidthType
-%INT8TYPE Type class for int8 data. 
+classdef Int8Type < arrow.type.NumericType
 
     methods 
         function obj = Int8Type(proxy)
             arguments
                 proxy(1, 1) libmexclass.proxy.Proxy {validate(proxy, "arrow.type.proxy.Int8Type")}
             end
             import arrow.internal.proxy.validate
-            obj@arrow.type.FixedWidthType(proxy);
-        end
-    end
-
-    methods (Access=protected)
-        function groups = getDisplayPropertyGroups(~)
-            targets = "ID";
-            groups = matlab.mixin.util.PropertyGroup(targets);
+            obj@arrow.type.NumericType(proxy);
         end
     end
 end

matlab/src/matlab/+arrow/+type/NumericType.m

@@ -0,0 +1,43 @@
+%NUMERICTYPE Type class for numeric data
+
+% 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.
+
+classdef NumericType < arrow.type.FixedWidthType
+
+    methods
+        function obj = NumericType(proxy)
+            arguments
+                proxy(1, 1) libmexclass.proxy.Proxy
+            end
+
+            obj@arrow.type.FixedWidthType(proxy);
+        end
+    end
+
+    methods(Hidden)
+        function data = preallocateMATLABArray(obj, length)
+            traits = arrow.type.traits.traits(obj.ID);
+            data = zeros([length 1], traits.MatlabClassName);
+        end
+    end
+
+    methods (Access=protected)
+        function groups = getDisplayPropertyGroups(~)
+            targets = "ID";
+            groups = matlab.mixin.util.PropertyGroup(targets);
+        end
+    end
+end

matlab/src/matlab/+arrow/+type/StringType.m

@@ -32,5 +32,11 @@
             groups = matlab.mixin.util.PropertyGroup(targets);
         end
     end
+
+    methods(Hidden)
+        function data = preallocateMATLABArray(~, length)
+            data = strings(length, 1);
+        end
+    end
 end
 

matlab/src/matlab/+arrow/+type/TimeType.m

@@ -42,4 +42,11 @@
         end
     end
 
+    methods(Hidden)
+        function data = preallocateMATLABArray(~, length)
+            data = NaN([length 1]);
+            data = seconds(data);
+        end
+    end
+
 end

matlab/src/matlab/+arrow/+type/TimestampType.m

@@ -47,4 +47,10 @@
             groups = matlab.mixin.util.PropertyGroup(targets);
         end
     end
+
+    methods(Hidden)
+        function data = preallocateMATLABArray(obj, length)
+            data = NaT([length, 1], TimeZone=obj.TimeZone);
+        end
+    end
 end

matlab/src/matlab/+arrow/+type/Type.m

@@ -93,6 +93,10 @@ function displayScalarHandleToDeletedObject(obj)
         end
     end
 
+    methods(Abstract, Hidden)
+        data = preallocateMATLABArray(obj, length)
+    end
+
     methods (Sealed)
         function tf = isequal(obj, varargin)
 

matlab/src/matlab/+arrow/+type/UInt16Type.m

@@ -1,3 +1,5 @@
+%UINT16TYPE Type class for uint16 data.
+
 % 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.
@@ -13,24 +15,15 @@
 % implied.  See the License for the specific language governing
 % permissions and limitations under the License.
 
-classdef UInt16Type < arrow.type.FixedWidthType
-%UINT16TYPE Type class for uint16 data.
+classdef UInt16Type < arrow.type.NumericType
 
     methods 
         function obj = UInt16Type(proxy)
             arguments
                 proxy(1, 1) libmexclass.proxy.Proxy {validate(proxy, "arrow.type.proxy.UInt16Type")}
             end
             import arrow.internal.proxy.validate
-            obj@arrow.type.FixedWidthType(proxy);
-        end
-    end
-
-
-    methods (Access=protected)
-        function groups = getDisplayPropertyGroups(~)
-            targets = "ID";
-            groups = matlab.mixin.util.PropertyGroup(targets);
+            obj@arrow.type.NumericType(proxy);
         end
     end
 end

matlab/src/matlab/+arrow/+type/UInt32Type.m

@@ -1,3 +1,5 @@
+%UINT32TYPE Type class for uint32 data.
+
 % 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.
@@ -13,24 +15,15 @@
 % implied.  See the License for the specific language governing
 % permissions and limitations under the License.
 
-classdef UInt32Type < arrow.type.FixedWidthType
-%UINT32TYPE Type class for uint32 data.
+classdef UInt32Type < arrow.type.NumericType
 
     methods 
         function obj = UInt32Type(proxy)
             arguments
                 proxy(1, 1) libmexclass.proxy.Proxy {validate(proxy, "arrow.type.proxy.UInt32Type")}
             end
             import arrow.internal.proxy.validate
-            obj@arrow.type.FixedWidthType(proxy);
-        end
-    end
-
-
-    methods (Access=protected)
-        function groups = getDisplayPropertyGroups(~)
-            targets = "ID";
-            groups = matlab.mixin.util.PropertyGroup(targets);
+            obj@arrow.type.NumericType(proxy);
         end
     end
 end