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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
using System.Diagnostics;
using System.Reflection;
using System.Text;
namespace CrupestApi.Commons.Crud;
public class ColumnInfo
{
private readonly AggregateColumnMetadata _metadata = new AggregateColumnMetadata();
private ILogger<ColumnInfo> _logger;
/// <summary>
/// Initialize a column without corresponding property.
/// </summary>
public ColumnInfo(TableInfo table, IColumnMetadata metadata, Type clrType, IColumnTypeProvider typeProvider, ILoggerFactory loggerFactory)
{
_logger = loggerFactory.CreateLogger<ColumnInfo>();
if (metadata is null)
throw new ArgumentException("You must specify metadata for non-property column.");
if (metadata.TryGetValue(ColumnMetadataKeys.ColumnName, out var columnName))
_logger.LogInformation("Create column without property.", columnName);
else
throw new ArgumentException("You must specify name in metadata for non-property column.");
Table = table;
_metadata.Add(metadata);
ColumnType = typeProvider.Get(clrType);
}
/// <summary>
/// Initialize a column with corresponding property.
/// </summary>
public ColumnInfo(TableInfo table, PropertyInfo propertyInfo, IColumnTypeProvider typeProvider, ILoggerFactory loggerFactory)
{
_logger = loggerFactory.CreateLogger<ColumnInfo>();
_logger.LogInformation("Create column with property {}.", propertyInfo.Name);
Table = table;
PropertyInfo = propertyInfo;
ColumnType = typeProvider.Get(propertyInfo.PropertyType);
var columnAttribute = propertyInfo.GetCustomAttribute<ColumnAttribute>();
if (columnAttribute is not null)
{
_metadata.Add(columnAttribute);
}
}
public TableInfo Table { get; }
public Type EntityType => Table.EntityType;
// If null, there is no corresponding property.
public PropertyInfo? PropertyInfo { get; } = null;
public IColumnMetadata Metadata => _metadata;
public IColumnTypeInfo ColumnType { get; }
public bool IsPrimaryKey => Metadata.GetValueOrDefault(ColumnMetadataKeys.IsPrimaryKey) is true;
public bool IsAutoIncrement => IsPrimaryKey;
public bool IsNotNull => IsPrimaryKey || Metadata.GetValueOrDefault(ColumnMetadataKeys.NotNull) is true;
public bool IsOnlyGenerated => Metadata.GetValueOrDefault(ColumnMetadataKeys.OnlyGenerated) is true;
public bool IsNoUpdate => Metadata.GetValueOrDefault(ColumnMetadataKeys.NoUpdate) is true;
public object? DefaultValue => Metadata.GetValueOrDefault(ColumnMetadataKeys.DefaultValue);
/// <summary>
/// This only returns metadata value. It doesn't not fall back to primary column. If you want to get the real key column, go to table info.
/// </summary>
/// <seealso cref="ColumnMetadataKeys.ActAsKey"/>
/// <seealso cref="TableInfo.KeyColumn"/>
public bool IsSpecifiedAsKey => Metadata.GetValueOrDefault(ColumnMetadataKeys.ActAsKey) is true;
public ColumnIndexType Index => Metadata.GetValueOrDefault<ColumnIndexType?>(ColumnMetadataKeys.Index) ?? ColumnIndexType.None;
/// <summary>
/// Whether the column value can be generated, which means the column has a default value or a default value generator or is AUTOINCREMENT.
/// </summary>
public bool CanBeGenerated => DefaultValue is not null || DefaultValueGeneratorMethod is not null || IsAutoIncrement;
/// <summary>
/// The real column name. Maybe set in metadata or just the property name.
/// </summary>
/// <value></value>
public string ColumnName
{
get
{
object? value = Metadata.GetValueOrDefault(ColumnMetadataKeys.ColumnName);
Debug.Assert(value is null || value is string);
return ((string?)value ?? PropertyInfo?.Name) ?? throw new Exception("Failed to get column name.");
}
}
public MethodInfo? DefaultValueGeneratorMethod
{
get
{
object? value = Metadata.GetValueOrDefault(ColumnMetadataKeys.DefaultValueGenerator);
Debug.Assert(value is null || value is string);
MethodInfo? result;
if (value is null)
{
string methodName = ColumnName + "DefaultValueGenerator";
result = Table.EntityType.GetMethod(methodName, BindingFlags.Public | BindingFlags.Static);
}
else
{
string methodName = (string)value;
result = Table.EntityType.GetMethod(methodName, BindingFlags.Static) ?? throw new Exception("The default value generator does not exist.");
}
return result;
}
}
public MethodInfo? ValidatorMethod
{
get
{
object? value = Metadata.GetValueOrDefault(ColumnMetadataKeys.DefaultValueGenerator);
Debug.Assert(value is null || value is string);
MethodInfo? result;
if (value is null)
{
string methodName = ColumnName + "Validator";
result = Table.EntityType.GetMethod(methodName, BindingFlags.Static);
}
else
{
string methodName = (string)value;
result = Table.EntityType.GetMethod(methodName, BindingFlags.Static) ?? throw new Exception("The validator does not exist.");
}
return result;
}
}
public void InvokeValidator(object? value)
{
var method = this.ValidatorMethod;
if (method is null)
{
_logger.LogInformation("Try to invoke validator for column {} but it does not exist.", ColumnName);
return;
}
var parameters = method.GetParameters();
if (parameters.Length == 0)
{
throw new Exception("The validator method must have at least one parameter.");
}
else if (parameters.Length == 1)
{
method.Invoke(null, new object?[] { value });
}
else if (parameters.Length == 2)
{
if (parameters[0].ParameterType == typeof(ColumnInfo))
method.Invoke(null, new object?[] { this, value });
else if (parameters[1].ParameterType == typeof(ColumnInfo))
method.Invoke(null, new object?[] { value, this });
else
throw new Exception("The validator method must have a parameter of type ColumnInfo if it has 2 parameters.");
}
else
{
throw new Exception("The validator method can only have 1 or 2 parameters.");
}
}
public object? InvokeDefaultValueGenerator()
{
var method = this.DefaultValueGeneratorMethod;
if (method is null)
{
_logger.LogInformation("Try to invoke default value generator for column {} but it does not exist.", ColumnName);
return null;
}
var parameters = method.GetParameters();
if (parameters.Length == 0)
{
return method.Invoke(null, new object?[0]);
}
else if (parameters.Length == 1)
{
if (parameters[0].ParameterType != typeof(ColumnInfo))
throw new Exception("The default value generator method can only have a parameter of type ColumnInfo.");
return method.Invoke(null, new object?[] { this });
}
else
{
throw new Exception("The default value generator method can only have 0 or 1 parameter.");
}
}
public object? GenerateDefaultValue()
{
if (DefaultValueGeneratorMethod is not null)
{
return InvokeDefaultValueGenerator();
}
if (Metadata.TryGetValue(ColumnMetadataKeys.DefaultValue, out object? value))
{
return value;
}
else
{
return null;
}
}
public string GenerateCreateTableColumnString(string? dbProviderId = null)
{
StringBuilder result = new StringBuilder();
result.Append(ColumnName);
result.Append(' ');
result.Append(ColumnType.GetSqlTypeString(dbProviderId));
if (IsPrimaryKey)
{
result.Append(' ');
result.Append("PRIMARY KEY");
}
else if (IsNotNull)
{
result.Append(' ');
result.Append("NOT NULL");
}
if (IsAutoIncrement)
{
result.Append(' ');
result.Append("AUTOINCREMENT");
}
return result.ToString();
}
}
|
