1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
//---------------------------------------------------------------------
// <copyright file="Emitter.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner [....]
// @backupOwner [....]
//---------------------------------------------------------------------
using System;
using System.CodeDom;
using System.Diagnostics;
using System.Data.EntityModel.SchemaObjectModel;
namespace System.Data.EntityModel.Emitters
{
/// <summary>
///
/// </summary>
internal abstract class Emitter
{
#region Instance Fields
private ClientApiGenerator _generator = null;
#endregion
#region Static Fields
private static CodeExpression _nullExpression = null;
private static CodeExpression _thisRef = null;
/// <summary>Name of property used to get StorageContext from an Entity</summary>
private const string EntityGetContextPropertyName = "Context";
/// <summary>Name of property used to get StorageContext from a StorageSearcher</summary>
protected const string SearcherGetContextPropertyName = "Context";
#endregion
#region Protected Methods
/// <summary>
///
/// </summary>
/// <param name="generator"></param>
protected Emitter(ClientApiGenerator generator)
{
Generator = generator;
}
/// <summary>
///
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
protected static CodeBinaryOperatorExpression EmitExpressionEqualsNull(CodeExpression expression)
{
return new CodeBinaryOperatorExpression(expression, CodeBinaryOperatorType.IdentityEquality, NullExpression);
}
protected static CodeBinaryOperatorExpression EmitExpressionDoesNotEqualNull(CodeExpression expression)
{
return new CodeBinaryOperatorExpression(expression, CodeBinaryOperatorType.IdentityInequality, NullExpression);
}
internal static CodeExpression EmitEnumMemberExpression(CodeTypeReference type, string member)
{
CodeTypeReferenceExpression typeref = new CodeTypeReferenceExpression(type);
return new CodeFieldReferenceExpression(typeref, member);
}
#endregion
#region Protected Properties
/// <summary>
///
/// </summary>
protected static CodeExpression ThisRef
{
get
{
if (_thisRef == null)
_thisRef = new CodeThisReferenceExpression();
return _thisRef;
}
}
/// <summary>
///
/// </summary>
internal ClientApiGenerator Generator
{
get
{
return _generator;
}
private set
{
_generator = value;
}
}
protected TypeReference TypeReference
{
get
{
return _generator.TypeReference;
}
}
protected AttributeEmitter AttributeEmitter
{
get { return _generator.AttributeEmitter; }
}
protected static CodeExpression NullExpression
{
get
{
if (_nullExpression == null)
_nullExpression = new CodePrimitiveExpression(null);
return _nullExpression;
}
}
#endregion
}
}
|
