forked from mybatis/mybatis-3
/
UnknownTypeHandler.java
161 lines (146 loc) · 5.59 KB
/
UnknownTypeHandler.java
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
/**
* Copyright 2009-2019 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.ibatis.type;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Supplier;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.Configuration;
/**
* @author Clinton Begin
*/
public class UnknownTypeHandler extends BaseTypeHandler<Object> {
private static final ObjectTypeHandler OBJECT_TYPE_HANDLER = new ObjectTypeHandler();
// TODO Rename to 'configuration' after removing the 'configuration' property(deprecated property) on parent class
private final Configuration config;
private final Supplier<TypeHandlerRegistry> typeHandlerRegistrySupplier;
/**
* The constructor that pass a MyBatis configuration.
*
* @param configuration a MyBatis configuration
* @since 3.5.4
*/
public UnknownTypeHandler(Configuration configuration) {
this.config = configuration;
this.typeHandlerRegistrySupplier = configuration::getTypeHandlerRegistry;
}
/**
* The constructor that pass the type handler registry.
*
* @param typeHandlerRegistry a type handler registry
* @deprecated Since 3.5.4, please use the {@link #UnknownTypeHandler(Configuration)}.
*/
@Deprecated
public UnknownTypeHandler(TypeHandlerRegistry typeHandlerRegistry) {
this.config = new Configuration();
this.typeHandlerRegistrySupplier = () -> typeHandlerRegistry;
}
@Override
public void setNonNullParameter(PreparedStatement ps, int i, Object parameter, JdbcType jdbcType)
throws SQLException {
TypeHandler handler = resolveTypeHandler(parameter, jdbcType);
handler.setParameter(ps, i, parameter, jdbcType);
}
@Override
public Object getNullableResult(ResultSet rs, String columnName)
throws SQLException {
TypeHandler<?> handler = resolveTypeHandler(rs, columnName);
return handler.getResult(rs, columnName);
}
@Override
public Object getNullableResult(ResultSet rs, int columnIndex)
throws SQLException {
TypeHandler<?> handler = resolveTypeHandler(rs.getMetaData(), columnIndex);
if (handler == null || handler instanceof UnknownTypeHandler) {
handler = OBJECT_TYPE_HANDLER;
}
return handler.getResult(rs, columnIndex);
}
@Override
public Object getNullableResult(CallableStatement cs, int columnIndex)
throws SQLException {
return cs.getObject(columnIndex);
}
private TypeHandler<?> resolveTypeHandler(Object parameter, JdbcType jdbcType) {
TypeHandler<?> handler;
if (parameter == null) {
handler = OBJECT_TYPE_HANDLER;
} else {
handler = typeHandlerRegistrySupplier.get().getTypeHandler(parameter.getClass(), jdbcType);
// check if handler is null (issue #270)
if (handler == null || handler instanceof UnknownTypeHandler) {
handler = OBJECT_TYPE_HANDLER;
}
}
return handler;
}
private TypeHandler<?> resolveTypeHandler(ResultSet rs, String column) {
try {
Map<String,Integer> columnIndexLookup;
columnIndexLookup = new HashMap<>();
ResultSetMetaData rsmd = rs.getMetaData();
int count = rsmd.getColumnCount();
boolean useColumnLabel = config.isUseColumnLabel();
for (int i = 1; i <= count; i++) {
String name = useColumnLabel ? rsmd.getColumnLabel(i) : rsmd.getColumnName(i);
columnIndexLookup.put(name,i);
}
Integer columnIndex = columnIndexLookup.get(column);
TypeHandler<?> handler = null;
if (columnIndex != null) {
handler = resolveTypeHandler(rsmd, columnIndex);
}
if (handler == null || handler instanceof UnknownTypeHandler) {
handler = OBJECT_TYPE_HANDLER;
}
return handler;
} catch (SQLException e) {
throw new TypeException("Error determining JDBC type for column " + column + ". Cause: " + e, e);
}
}
private TypeHandler<?> resolveTypeHandler(ResultSetMetaData rsmd, Integer columnIndex) {
TypeHandler<?> handler = null;
JdbcType jdbcType = safeGetJdbcTypeForColumn(rsmd, columnIndex);
Class<?> javaType = safeGetClassForColumn(rsmd, columnIndex);
if (javaType != null && jdbcType != null) {
handler = typeHandlerRegistrySupplier.get().getTypeHandler(javaType, jdbcType);
} else if (javaType != null) {
handler = typeHandlerRegistrySupplier.get().getTypeHandler(javaType);
} else if (jdbcType != null) {
handler = typeHandlerRegistrySupplier.get().getTypeHandler(jdbcType);
}
return handler;
}
private JdbcType safeGetJdbcTypeForColumn(ResultSetMetaData rsmd, Integer columnIndex) {
try {
return JdbcType.forCode(rsmd.getColumnType(columnIndex));
} catch (Exception e) {
return null;
}
}
private Class<?> safeGetClassForColumn(ResultSetMetaData rsmd, Integer columnIndex) {
try {
return Resources.classForName(rsmd.getColumnClassName(columnIndex));
} catch (Exception e) {
return null;
}
}
}