hunt.sql.ast.statement.SQLAlterTableRename source code

1 /*
2  * Copyright 2015-2018 HuntLabs.cn
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 module hunt.sql.ast.statement.SQLAlterTableRename;
17 
18 import hunt.sql.ast.SQLExpr;
19 import hunt.sql.ast.SQLName;
20 import hunt.sql.ast.SQLObjectImpl;
21 import hunt.sql.ast.expr.SQLIdentifierExpr;
22 import hunt.sql.visitor.SQLASTVisitor;
23 import hunt.sql.ast.statement.SQLAlterTableItem;
24 import hunt.sql.ast.statement.SQLExprTableSource;
25 
26 public class SQLAlterTableRename : SQLObjectImpl , SQLAlterTableItem {
27 
28     protected SQLExprTableSource to;
29 
30     public this() {
31 
32     }
33 
34     public this(SQLExpr to) {
35         this.setTo(to);
36     }
37 
38     public this(string to) {
39         this.setTo(to);
40     }
41 
42     public SQLExprTableSource getTo() {
43         return to;
44     }
45 
46     public SQLName getToName() {
47         if (to is null) {
48             return null;
49         }
50 
51         SQLExpr expr = to.expr;
52 
53         if ( cast(SQLName)expr !is null) {
54             return cast(SQLName) expr;
55         }
56 
57         return null;
58     }
59 
60     public void setTo(SQLExprTableSource to) {
61         if (to !is null) {
62             to.setParent(this);
63         }
64         this.to = to;
65     }
66 
67     public void setTo(string to) {
68         this.setTo(new SQLIdentifierExpr(to));
69     }
70 
71     public void setTo(SQLExpr to) {
72         this.setTo(new SQLExprTableSource(to));
73     }
74 
75     override  protected void accept0(SQLASTVisitor visitor) {
76         if (visitor.visit(this)) {
77             acceptChild(visitor, to);
78         }
79         visitor.endVisit(this);
80     }
81 
82 }