hunt.sql.ast.statement.SQLExprHint 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.SQLExprHint;
17 
18 import hunt.sql.ast.SQLExpr;
19 import hunt.sql.ast.SQLHint;
20 import hunt.sql.ast.SQLObjectImpl;
21 import hunt.sql.visitor.SQLASTVisitor;
22 
23 public class SQLExprHint : SQLObjectImpl , SQLHint {
24 
25     private SQLExpr expr;
26 
27     public this(){
28 
29     }
30 
31     public this(SQLExpr expr){
32         this.setExpr(expr);
33     }
34 
35     public SQLExpr getExpr() {
36         return expr;
37     }
38 
39     public void setExpr(SQLExpr expr) {
40         if (expr !is null) {
41             expr.setParent(this);
42         }
43 
44         this.expr = expr;
45     }
46 
47     
48     override  protected void accept0(SQLASTVisitor visitor) {
49         if (visitor.visit(this)) {
50             acceptChild(visitor, expr);
51         }
52         visitor.endVisit(this);
53     }
54 
55     override public SQLExprHint clone() {
56         SQLExprHint x = new SQLExprHint();
57         if (expr !is null) {
58             x.setExpr(expr.clone());
59         }
60         return x;
61     }
62 }