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896e6eb9
编写于
6月 04, 2019
作者:
T
tristaZero
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差异文件
add InsertSetAddItemsTokenGenerator
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sharding-core/sharding-core-rewrite/src/main/java/org/apache/shardingsphere/core/rewrite/token/generator/InsertSetAddItemsTokenGenerator.java
...rite/token/generator/InsertSetAddItemsTokenGenerator.java
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sharding-core/sharding-core-rewrite/src/main/java/org/apache/shardingsphere/core/rewrite/token/generator/InsertSetAddItemsTokenGenerator.java
0 → 100644
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896e6eb9
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.shardingsphere.core.rewrite.token.generator
;
import
com.google.common.base.Optional
;
import
org.apache.shardingsphere.core.parse.sql.segment.dml.assignment.AssignmentSegment
;
import
org.apache.shardingsphere.core.parse.sql.segment.dml.assignment.SetAssignmentsSegment
;
import
org.apache.shardingsphere.core.parse.sql.statement.SQLStatement
;
import
org.apache.shardingsphere.core.parse.sql.statement.dml.InsertStatement
;
import
org.apache.shardingsphere.core.parse.sql.token.impl.InsertSetAddItemsToken
;
import
org.apache.shardingsphere.core.rule.EncryptRule
;
import
java.util.ArrayList
;
import
java.util.Collection
;
import
java.util.LinkedList
;
import
java.util.List
;
/**
* Insert set add items token generator.
*
* @author panjuan
*/
public
final
class
InsertSetAddItemsTokenGenerator
implements
OptionalSQLTokenGenerator
<
EncryptRule
>
{
@Override
public
Optional
<
InsertSetAddItemsToken
>
generateSQLToken
(
final
SQLStatement
sqlStatement
,
final
EncryptRule
encryptRule
)
{
Optional
<
SetAssignmentsSegment
>
setAssignmentsSegment
=
sqlStatement
.
findSQLSegment
(
SetAssignmentsSegment
.
class
);
if
(!(
sqlStatement
instanceof
InsertStatement
&&
setAssignmentsSegment
.
isPresent
()))
{
return
Optional
.
absent
();
}
return
createInsertSetAddItemsToken
((
InsertStatement
)
sqlStatement
,
encryptRule
,
setAssignmentsSegment
.
get
());
}
private
Optional
<
InsertSetAddItemsToken
>
createInsertSetAddItemsToken
(
final
InsertStatement
insertStatement
,
final
EncryptRule
encryptRule
,
final
SetAssignmentsSegment
segment
)
{
Collection
<
String
>
columnNames
=
getQueryAssistedColumn
(
insertStatement
,
encryptRule
);
if
(
columnNames
.
isEmpty
())
{
return
Optional
.
absent
();
}
List
<
AssignmentSegment
>
assignments
=
new
ArrayList
<>(
segment
.
getAssignments
());
return
Optional
.
of
(
new
InsertSetAddItemsToken
(
assignments
.
get
(
assignments
.
size
()
-
1
).
getStopIndex
()
+
1
,
columnNames
));
}
private
Collection
<
String
>
getQueryAssistedColumn
(
final
InsertStatement
insertStatement
,
final
EncryptRule
encryptRule
)
{
Collection
<
String
>
result
=
new
LinkedList
<>();
for
(
String
each
:
insertStatement
.
getColumnNames
())
{
Optional
<
String
>
assistedColumnName
=
encryptRule
.
getEncryptorEngine
().
getAssistedQueryColumn
(
insertStatement
.
getTables
().
getSingleTableName
(),
each
);
if
(
assistedColumnName
.
isPresent
())
{
result
.
add
(
assistedColumnName
.
get
());
}
}
return
result
;
}
}
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