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体验新版 GitCode,发现更多精彩内容 >>
提交
2497c012
编写于
5月 25, 2018
作者:
T
tanghai
浏览文件
操作
浏览文件
下载
差异文件
修改Lambda表达式的实现
上级
f229469e
0d9780f4
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
20 addition
and
158 deletion
+20
-158
Server/Hotfix/Module/DB/DBProxyComponentSystem.cs
Server/Hotfix/Module/DB/DBProxyComponentSystem.cs
+20
-6
Server/Model/Module/DB/ExpressionVistor.cs
Server/Model/Module/DB/ExpressionVistor.cs
+0
-152
未找到文件。
Server/Hotfix/Module/DB/DBProxyComponentSystem.cs
浏览文件 @
2497c012
...
...
@@ -4,6 +4,10 @@ using System.Linq.Expressions;
using
System.Threading
;
using
System.Threading.Tasks
;
using
ETModel
;
using
MongoDB.Bson
;
using
MongoDB.Bson.Serialization
;
using
MongoDB.Bson.Serialization.Serializers
;
using
MongoDB.Driver
;
namespace
ETHotfix
{
...
...
@@ -57,6 +61,22 @@ namespace ETHotfix
DBQueryResponse
dbQueryResponse
=
(
DBQueryResponse
)
await
session
.
Call
(
new
DBQueryRequest
{
CollectionName
=
typeof
(
T
).
Name
,
Id
=
id
,
NeedCache
=
needCache
});
return
(
T
)
dbQueryResponse
.
Component
;
}
public
static
async
Task
<
List
<
T
>>
Query
<
T
>(
this
DBProxyComponent
self
,
Expression
<
Func
<
T
,
bool
>>
exp
,
bool
needCache
=
true
)
where
T
:
ComponentWithId
{
List
<
T
>
list
=
new
List
<
T
>();
Session
session
=
Game
.
Scene
.
GetComponent
<
NetInnerComponent
>().
Get
(
self
.
dbAddress
);
ExpressionFilterDefinition
<
T
>
filter
=
new
ExpressionFilterDefinition
<
T
>(
exp
);
IBsonSerializerRegistry
serializerRegistry
=
BsonSerializer
.
SerializerRegistry
;
IBsonSerializer
<
T
>
documentSerializer
=
serializerRegistry
.
GetSerializer
<
T
>();
string
json
=
filter
.
Render
(
documentSerializer
,
serializerRegistry
).
ToJson
();
DBQueryJsonResponse
dbQueryResponse
=
(
DBQueryJsonResponse
)
await
session
.
Call
(
new
DBQueryJsonRequest
{
CollectionName
=
typeof
(
T
).
Name
,
Json
=
json
});
foreach
(
ComponentWithId
component
in
dbQueryResponse
.
Components
)
{
list
.
Add
((
T
)
component
);
}
return
list
;
}
public
static
async
Task
<
List
<
T
>>
QueryBatch
<
T
>(
this
DBProxyComponent
self
,
List
<
long
>
ids
,
bool
needCache
=
true
)
where
T
:
ComponentWithId
{
...
...
@@ -69,12 +89,6 @@ namespace ETHotfix
}
return
list
;
}
public
static
async
Task
<
List
<
T
>>
Query
<
T
>(
this
DBProxyComponent
self
,
Expression
<
Func
<
T
,
bool
>>
func
)
where
T
:
ComponentWithId
{
ExpressionVistor
vistor
=
new
ExpressionVistor
(
func
);
return
await
self
.
QueryJson
<
T
>(
vistor
.
Output
);
}
public
static
async
Task
<
List
<
T
>>
QueryJson
<
T
>(
this
DBProxyComponent
self
,
string
json
)
where
T
:
ComponentWithId
{
...
...
Server/Model/Module/DB/ExpressionVistor.cs
已删除
100644 → 0
浏览文件 @
f229469e
using
System
;
using
System.Linq.Expressions
;
using
System.Reflection
;
using
System.Text
;
namespace
ETModel
{
public
sealed
class
ExpressionVistor
:
ExpressionVisitor
{
private
readonly
StringBuilder
Builder
=
new
StringBuilder
(
"{"
);
public
string
Output
{
get
{
return
this
.
Builder
.
ToString
();
}
}
private
string
Variable
;
private
ExpressionType
NodeType
;
public
ExpressionVistor
(
Expression
node
)
{
Visit
(
node
);
}
protected
override
Expression
VisitLambda
<
T
>(
Expression
<
T
>
node
)
{
Expression
lambda
=
base
.
VisitLambda
(
node
);
this
.
Builder
.
Remove
(
this
.
Builder
.
Length
-
1
,
1
);
//Remove the Last Comma
this
.
Builder
.
Append
(
"}"
);
return
lambda
;
}
protected
override
Expression
VisitBinary
(
BinaryExpression
node
)
{
this
.
NodeType
=
node
.
NodeType
;
return
base
.
VisitBinary
(
node
);
}
protected
override
Expression
VisitMember
(
MemberExpression
node
)
{
switch
(
node
.
Expression
.
NodeType
)
{
case
ExpressionType
.
Constant
:
case
ExpressionType
.
MemberAccess
:
{
ConstantExpression
cleanNode
=
GetMemberConstant
(
node
);
return
VisitConstant
(
cleanNode
);
}
}
if
(
node
.
Member
.
Name
!=
nameof
(
ComponentWithId
.
Id
))
{
this
.
Variable
=
node
.
Member
.
Name
;
}
else
{
this
.
Variable
=
"_id"
;
}
return
base
.
VisitMember
(
node
);
}
private
static
ConstantExpression
GetMemberConstant
(
MemberExpression
node
)
{
object
value
;
switch
(
node
.
Member
.
MemberType
)
{
case
MemberTypes
.
Field
:
value
=
GetFieldValue
(
node
);
break
;
case
MemberTypes
.
Property
:
value
=
GetPropertyValue
(
node
);
break
;
default
:
throw
new
NotSupportedException
();
}
return
Expression
.
Constant
(
value
,
node
.
Type
);
}
protected
override
Expression
VisitConstant
(
ConstantExpression
node
)
{
this
.
Builder
.
Append
(
this
.
Variable
);
bool
flag
=
false
;
switch
(
this
.
NodeType
)
{
case
ExpressionType
.
Equal
:
this
.
Builder
.
Append
(
":"
);
break
;
case
ExpressionType
.
GreaterThan
:
this
.
Builder
.
Append
(
":{"
);
this
.
Builder
.
Append
(
"$gt:"
);
flag
=
true
;
break
;
case
ExpressionType
.
GreaterThanOrEqual
:
this
.
Builder
.
Append
(
":{"
);
this
.
Builder
.
Append
(
"$gte:"
);
flag
=
true
;
break
;
case
ExpressionType
.
LessThan
:
this
.
Builder
.
Append
(
":{"
);
this
.
Builder
.
Append
(
"$lt:"
);
flag
=
true
;
break
;
case
ExpressionType
.
LessThanOrEqual
:
this
.
Builder
.
Append
(
":{"
);
this
.
Builder
.
Append
(
"lte:"
);
flag
=
true
;
break
;
}
this
.
Builder
.
Append
(
node
.
Value
);
if
(
flag
)
{
this
.
Builder
.
Append
(
"}"
);
}
this
.
Builder
.
Append
(
","
);
return
base
.
VisitConstant
(
node
);
}
private
static
object
GetFieldValue
(
MemberExpression
node
)
{
FieldInfo
fieldInfo
=
(
FieldInfo
)
node
.
Member
;
object
instance
=
node
.
Expression
==
null
?
null
:
TryEvaluate
(
node
.
Expression
).
Value
;
return
fieldInfo
.
GetValue
(
instance
);
}
private
static
object
GetPropertyValue
(
MemberExpression
node
)
{
PropertyInfo
propertyInfo
=
(
PropertyInfo
)
node
.
Member
;
object
instance
=
node
.
Expression
==
null
?
null
:
TryEvaluate
(
node
.
Expression
).
Value
;
return
propertyInfo
.
GetValue
(
instance
,
null
);
}
private
static
ConstantExpression
TryEvaluate
(
Expression
expression
)
{
if
(
expression
.
NodeType
!=
ExpressionType
.
Constant
)
{
throw
new
NotSupportedException
();
}
return
(
ConstantExpression
)
expression
;
}
}
}
\ No newline at end of file
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