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pythonnet/src/runtime/genericutil.cs at master · sdpython/pythonnet · GitHub
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using
System
.
Linq
;
using
System
;
using
System
.
Collections
.
Generic
;
using
System
.
Resources
;
namespace
Python
.
Runtime
{
/// <summary>
/// This class is responsible for efficiently maintaining the bits
/// of information we need to support aliases with 'nice names'.
/// </summary>
internal
static
class
GenericUtil
{
/// <summary>
/// Maps namespace -> generic base name -> list of generic type names
/// </summary>
private
static
Dictionary
<
string
,
Dictionary
<
string
,
List
<
string
>
>
>
mapping
;
public
static
void
Reset
(
)
{
mapping
=
new
Dictionary
<
string
,
Dictionary
<
string
,
List
<
string
>
>
>
(
)
;
}
/// <summary>
/// Register a generic type that appears in a given namespace.
/// </summary>
/// <param name="t">A generic type definition (<c>t.IsGenericTypeDefinition</c> must be true)</param>
internal
static
void
Register
(
Type
t
)
{
if
(
null
==
t
.
Namespace
||
null
==
t
.
Name
)
{
return
;
}
Dictionary
<
string
,
List
<
string
>
>
nsmap
;
if
(
!
mapping
.
TryGetValue
(
t
.
Namespace
,
out
nsmap
)
)
{
nsmap
=
new
Dictionary
<
string
,
List
<
string
>
>
(
)
;
mapping
[
t
.
Namespace
]
=
nsmap
;
}
string
basename
=
GetBasename
(
t
.
Name
)
;
List
<
string
>
gnames
;
if
(
!
nsmap
.
TryGetValue
(
basename
,
out
gnames
)
)
{
gnames
=
new
List
<
string
>
(
)
;
nsmap
[
basename
]
=
gnames
;
}
gnames
.
Add
(
t
.
Name
)
;
}
/// <summary>
/// xxx
/// </summary>
public
static
List
<
string
>
GetGenericBaseNames
(
string
ns
)
{
Dictionary
<
string
,
List
<
string
>
>
nsmap
;
if
(
!
mapping
.
TryGetValue
(
ns
,
out
nsmap
)
)
{
return
null
;
}
var
names
=
new
List
<
string
>
(
)
;
foreach
(
string
key
in
nsmap
.
Keys
)
{
names
.
Add
(
key
)
;
}
return
names
;
}
/// <summary>
/// Finds a generic type with the given number of generic parameters and the same name and namespace as <paramref name="t"/>.
/// </summary>
public
static
Type
GenericForType
(
Type
t
,
int
paramCount
)
{
return
GenericByName
(
t
.
Namespace
,
t
.
Name
,
paramCount
)
;
}
/// <summary>
/// Finds a generic type in the given namespace with the given name and number of generic parameters.
/// </summary>
public
static
Type
GenericByName
(
string
ns
,
string
basename
,
int
paramCount
)
{
Dictionary
<
string
,
List
<
string
>
>
nsmap
;
if
(
!
mapping
.
TryGetValue
(
ns
,
out
nsmap
)
)
{
return
null
;
}
List
<
string
>
names
;
if
(
!
nsmap
.
TryGetValue
(
GetBasename
(
basename
)
,
out
names
)
)
{
return
null
;
}
foreach
(
string
name
in
names
)
{
string
qname
=
ns
+
"."
+
name
;
Type
o
=
AssemblyManager
.
LookupTypes
(
qname
)
.
FirstOrDefault
(
)
;
if
(
o
!=
null
&&
o
.
GetGenericArguments
(
)
.
Length
==
paramCount
)
{
return
o
;
}
}
return
null
;
}
/// <summary>
/// xxx
/// </summary>
public
static
string
GenericNameForBaseName
(
string
ns
,
string
name
)
{
Dictionary
<
string
,
List
<
string
>
>
nsmap
;
if
(
!
mapping
.
TryGetValue
(
ns
,
out
nsmap
)
)
{
return
null
;
}
List
<
string
>
gnames
;
nsmap
.
TryGetValue
(
name
,
out
gnames
)
;
if
(
gnames
?
.
Count
>
0
)
{
return
gnames
[
0
]
;
}
return
null
;
}
private
static
string
GetBasename
(
string
name
)
{
int
tick
=
name
.
IndexOf
(
"`"
)
;
if
(
tick
>
-
1
)
{
return
name
.
Substring
(
0
,
tick
)
;
}
else
{
return
name
;
}
}
}
}
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