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comparison Source/Data/Sql/SqlField.cs @ 0:f990fcb411a9

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Копия текущей версии из github
author cin
date Thu, 27 Mar 2014 21:46:09 +0400
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-1:000000000000 0:f990fcb411a9
1 using System;
2 using System.Collections.Generic;
3 using System.Text;
4
5 namespace BLToolkit.Data.Sql
6 {
7 using DataAccess;
8 using Mapping;
9
10 public class SqlField : IChild<ISqlTableSource>, ISqlExpression
11 {
12 public SqlField()
13 {
14 }
15
16 public SqlField(SqlField field)
17 : this(field.SystemType, field.Name, field.PhysicalName, field.Nullable, field.PrimaryKeyOrder, field._nonUpdatableAttribute, field.MemberMapper)
18 {
19 }
20
21 public SqlField(
22 Type systemType,
23 string name,
24 string physicalName,
25 bool nullable,
26 int pkOrder,
27 NonUpdatableAttribute nonUpdatableAttribute,
28 MemberMapper memberMapper)
29 {
30 SystemType = systemType;
31 Alias = name.Replace('.', '_');
32 Name = name;
33 Nullable = nullable;
34 PrimaryKeyOrder = pkOrder;
35 _memberMapper = memberMapper;
36 _physicalName = physicalName;
37 _nonUpdatableAttribute = nonUpdatableAttribute;
38 }
39
40 public Type SystemType { get; set; }
41 public string Alias { get; set; }
42 public string Name { get; set; }
43 public bool Nullable { get; set; }
44 public int PrimaryKeyOrder { get; set; }
45 public ISqlTableSource Table { get; private set; }
46
47 readonly MemberMapper _memberMapper;
48 public MemberMapper MemberMapper
49 {
50 get { return _memberMapper; }
51 }
52
53 private string _physicalName;
54 public string PhysicalName
55 {
56 get { return _physicalName ?? Name; }
57 set { _physicalName = value; }
58 }
59
60 public bool IsIdentity { get { return _nonUpdatableAttribute != null && _nonUpdatableAttribute.IsIdentity; } }
61 public bool IsInsertable { get { return _nonUpdatableAttribute == null || !_nonUpdatableAttribute.OnInsert; } }
62 public bool IsUpdatable { get { return _nonUpdatableAttribute == null || !_nonUpdatableAttribute.OnUpdate; } }
63
64 public bool IsPrimaryKey { get { return PrimaryKeyOrder != int.MinValue; } }
65
66 readonly NonUpdatableAttribute _nonUpdatableAttribute;
67
68 ISqlTableSource IChild<ISqlTableSource>.Parent { get { return Table; } set { Table = value; } }
69
70 #region Overrides
71
72 #if OVERRIDETOSTRING
73
74 public override string ToString()
75 {
76 return ((IQueryElement)this).ToString(new StringBuilder(), new Dictionary<IQueryElement,IQueryElement>()).ToString();
77 }
78
79 #endif
80
81 #endregion
82
83 #region ISqlExpression Members
84
85 public bool CanBeNull()
86 {
87 return Nullable;
88 }
89
90 public bool Equals(ISqlExpression other, Func<ISqlExpression,ISqlExpression,bool> comparer)
91 {
92 return this == other;
93 }
94
95 public int Precedence
96 {
97 get { return Sql.Precedence.Primary; }
98 }
99
100 #endregion
101
102 #region ISqlExpressionWalkable Members
103
104 ISqlExpression ISqlExpressionWalkable.Walk(bool skipColumns, Func<ISqlExpression,ISqlExpression> func)
105 {
106 return func(this);
107 }
108
109 #endregion
110
111 #region IEquatable<ISqlExpression> Members
112
113 bool IEquatable<ISqlExpression>.Equals(ISqlExpression other)
114 {
115 return this == other;
116 }
117
118 #endregion
119
120 #region ICloneableElement Members
121
122 public ICloneableElement Clone(Dictionary<ICloneableElement, ICloneableElement> objectTree, Predicate<ICloneableElement> doClone)
123 {
124 if (!doClone(this))
125 return this;
126
127 Table.Clone(objectTree, doClone);
128 return objectTree[this];
129 }
130
131 #endregion
132
133 #region IQueryElement Members
134
135 public QueryElementType ElementType { get { return QueryElementType.SqlField; } }
136
137 StringBuilder IQueryElement.ToString(StringBuilder sb, Dictionary<IQueryElement,IQueryElement> dic)
138 {
139 return sb
140 .Append('t')
141 .Append(Table.SourceID)
142 .Append('.')
143 .Append(Name);
144 }
145
146 #endregion
147 }
148 }