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CSHARP-4708: Support Expression.MakeIndex in LINQ3.
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11 files changed

+1006
-130
lines changed

11 files changed

+1006
-130
lines changed

‎src/MongoDB.Driver/Linq/Linq3Implementation/Misc/TypeExtensions.cs

Lines changed: 48 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -83,6 +83,21 @@ public static bool Implements(this Type type, Type @interface)
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return false;
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}
8585

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public static bool ImplementsIDictionary(this Type type, out Type keyType, out Type valueType)
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{
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if (TryGetIDictionaryGenericInterface(type, out var idictionaryType))
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{
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var genericArguments = idictionaryType.GetGenericArguments();
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keyType = genericArguments[0];
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valueType = genericArguments[1];
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return true;
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}
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keyType = null;
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valueType = null;
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return false;
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}
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public static bool ImplementsIEnumerable(this Type type, out Type itemType)
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{
88103
if (TryGetIEnumerableGenericInterface(type, out var ienumerableType))
@@ -102,6 +117,18 @@ public static bool ImplementsIEnumerableOf(this Type type, Type itemType)
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actualItemType == itemType;
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}
104119

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public static bool ImplementsIList(this Type type, out Type itemType)
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{
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if (TryGetIListGenericInterface(type, out var ilistType))
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{
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itemType = ilistType.GetGenericArguments()[0];
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return true;
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}
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itemType = null;
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return false;
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}
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public static bool Is(this Type type, Type comparand)
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{
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if (type == comparand)
@@ -262,5 +289,26 @@ public static bool TryGetIEnumerableGenericInterface(this Type type, out Type ie
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ienumerableGenericInterface = null;
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return false;
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}
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public static bool TryGetIListGenericInterface(this Type type, out Type ilistGenericInterface)
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{
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if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(IList<>))
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{
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ilistGenericInterface = type;
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return true;
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}
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foreach (var interfaceType in type.GetInterfaces())
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{
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if (interfaceType.IsGenericType && interfaceType.GetGenericTypeDefinition() == typeof(IList<>))
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{
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ilistGenericInterface = interfaceType;
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return true;
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}
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}
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ilistGenericInterface = null;
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return false;
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}
265313
}
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}

‎src/MongoDB.Driver/Linq/Linq3Implementation/Reflection/BsonValueMethod.cs

Lines changed: 26 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -31,8 +31,33 @@ static BsonValueMethod()
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__getItemWithString = ReflectionInfo.IndexerGet((BsonValue v, string index) => v[index]);
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}
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// public properties
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// public static properties
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public static MethodInfo GetItemWithInt => __getItemWithInt;
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public static MethodInfo GetItemWithString => __getItemWithString;
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// public static methods
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public static bool IsGetItemWithIntMethod(MethodInfo method)
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{
41+
return
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(method.DeclaringType == typeof(BsonValue) || method.DeclaringType.IsSubclassOf(typeof(BsonValue))) &&
43+
!method.IsStatic &&
44+
method.Name == "get_Item" &&
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method.GetParameters() is var parameters &&
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parameters.Length == 1 &&
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parameters[0].ParameterType == typeof(int) &&
48+
method.ReturnType == typeof(BsonValue);
49+
}
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51+
public static bool IsGetItemWithStringMethod(MethodInfo method)
52+
{
53+
return
54+
(method.DeclaringType == typeof(BsonValue) || method.DeclaringType.IsSubclassOf(typeof(BsonValue))) &&
55+
!method.IsStatic &&
56+
method.Name == "get_Item" &&
57+
method.GetParameters() is var parameters &&
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parameters.Length == 1 &&
59+
parameters[0].ParameterType == typeof(string) &&
60+
method.ReturnType == typeof(BsonValue);
61+
}
3762
}
3863
}

‎src/MongoDB.Driver/Linq/Linq3Implementation/Reflection/IDictionaryMethod.cs

Lines changed: 37 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,37 @@
1+
/* Copyright 2010-present MongoDB Inc.
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*
3+
* Licensed under the Apache License, Version 2.0 (the "License");
4+
* you may not use this file except in compliance with the License.
5+
* You may obtain a copy of the License at
6+
*
7+
* http://www.apache.org/licenses/LICENSE-2.0
8+
*
9+
* Unless required by applicable law or agreed to in writing, software
10+
* distributed under the License is distributed on an "AS IS" BASIS,
11+
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12+
* See the License for the specific language governing permissions and
13+
* limitations under the License.
14+
*/
15+
16+
using System.Reflection;
17+
using MongoDB.Driver.Linq.Linq3Implementation.Misc;
18+
19+
namespace MongoDB.Driver.Linq.Linq3Implementation.Reflection
20+
{
21+
internal static class IDictionaryMethod
22+
{
23+
// public static methods
24+
public static bool IsGetItemWithStringMethod(MethodInfo method)
25+
{
26+
return
27+
!method.IsStatic &&
28+
method.Name == "get_Item" &&
29+
method.GetParameters() is var parameters &&
30+
parameters.Length == 1 &&
31+
parameters[0].ParameterType == typeof(string) &&
32+
method.DeclaringType.ImplementsIDictionary(out var keyType, out var valueType) &&
33+
keyType == typeof(string) &&
34+
method.ReturnType == valueType;
35+
}
36+
}
37+
}

‎src/MongoDB.Driver/Linq/Linq3Implementation/Reflection/IListMethod.cs

Lines changed: 36 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,36 @@
1+
/* Copyright 2010-present MongoDB Inc.
2+
*
3+
* Licensed under the Apache License, Version 2.0 (the "License");
4+
* you may not use this file except in compliance with the License.
5+
* You may obtain a copy of the License at
6+
*
7+
* http://www.apache.org/licenses/LICENSE-2.0
8+
*
9+
* Unless required by applicable law or agreed to in writing, software
10+
* distributed under the License is distributed on an "AS IS" BASIS,
11+
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12+
* See the License for the specific language governing permissions and
13+
* limitations under the License.
14+
*/
15+
16+
using System.Reflection;
17+
using MongoDB.Driver.Linq.Linq3Implementation.Misc;
18+
19+
namespace MongoDB.Driver.Linq.Linq3Implementation.Reflection
20+
{
21+
internal static class IListMethod
22+
{
23+
// public static methods
24+
public static bool IsGetItemWithIntMethod(MethodInfo method)
25+
{
26+
return
27+
!method.IsStatic &&
28+
method.Name == "get_Item" &&
29+
method.GetParameters() is var parameters &&
30+
parameters.Length == 1 &&
31+
parameters[0].ParameterType == typeof(int) &&
32+
method.DeclaringType.ImplementsIList(out var itemType) &&
33+
method.ReturnType == itemType;
34+
}
35+
}
36+
}

‎src/MongoDB.Driver/Linq/Linq3Implementation/Translators/ExpressionToAggregationExpressionTranslators/ExpressionToAggregationExpressionTranslator.cs

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -66,6 +66,8 @@ public static AggregationExpression Translate(TranslationContext context, Expres
6666
return ConditionalExpressionToAggregationExpressionTranslator.Translate(context, (ConditionalExpression)expression);
6767
case ExpressionType.Constant:
6868
return ConstantExpressionToAggregationExpressionTranslator.Translate(context, (ConstantExpression)expression);
69+
case ExpressionType.Index:
70+
return IndexExpressionToAggregationExpressionTranslator.Translate(context, (IndexExpression)expression);
6971
case ExpressionType.MemberAccess:
7072
return MemberExpressionToAggregationExpressionTranslator.Translate(context, (MemberExpression)expression);
7173
case ExpressionType.MemberInit:

‎src/MongoDB.Driver/Linq/Linq3Implementation/Translators/ExpressionToAggregationExpressionTranslators/IndexExpressionToAggregationExpressionTranslator.cs

Lines changed: 32 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,32 @@
1+
/* Copyright 2010-present MongoDB Inc.
2+
*
3+
* Licensed under the Apache License, Version 2.0 (the "License");
4+
* you may not use this file except in compliance with the License.
5+
* You may obtain a copy of the License at
6+
*
7+
* http://www.apache.org/licenses/LICENSE-2.0
8+
*
9+
* Unless required by applicable law or agreed to in writing, software
10+
* distributed under the License is distributed on an "AS IS" BASIS,
11+
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12+
* See the License for the specific language governing permissions and
13+
* limitations under the License.
14+
*/
15+
16+
using System.Linq.Expressions;
17+
using MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.MethodTranslators;
18+
19+
namespace MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators
20+
{
21+
internal static class IndexExpressionToAggregationExpressionTranslator
22+
{
23+
// public static methods
24+
public static AggregationExpression Translate(TranslationContext context, IndexExpression expression)
25+
{
26+
var sourceExpression = expression.Object;
27+
var method = expression.Indexer.GetMethod;
28+
var arguments = expression.Arguments;
29+
return GetItemMethodToAggregationExpressionTranslator.Translate(context, expression, method, sourceExpression, arguments);
30+
}
31+
}
32+
}

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