hunt.sql.ast.expr.SQLCurrentOfCursorExpr 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.expr.SQLCurrentOfCursorExpr;
17 
18 import hunt.sql.ast.SQLExprImpl;
19 import hunt.sql.ast.SQLName;
20 import hunt.sql.ast.SQLObject;
21 import hunt.sql.visitor.SQLASTVisitor;
22 import hunt.collection;
23 import hunt.util.StringBuilder;
24 
25 public class SQLCurrentOfCursorExpr : SQLExprImpl {
26 
27     private SQLName cursorName;
28 
29     public this(){
30 
31     }
32 
33     public this(SQLName cursorName){
34         this.cursorName = cursorName;
35     }
36 
37     override public SQLCurrentOfCursorExpr clone() {
38         SQLCurrentOfCursorExpr x = new SQLCurrentOfCursorExpr();
39         if (cursorName !is null) {
40             x.setCursorName(cursorName.clone());
41         }
42         return x;
43     }
44 
45     public SQLName getCursorName() {
46         return cursorName;
47     }
48 
49     public void setCursorName(SQLName cursorName) {
50         if (cursorName !is null) {
51             cursorName.setParent(this);
52         }
53         this.cursorName = cursorName;
54     }
55 
56     override public void output(StringBuilder buf) {
57         buf.append("CURRENT OF ");
58         cursorName.output(buf);
59     }
60 
61     override  protected void accept0(SQLASTVisitor visitor) {
62         if (visitor.visit(this)) {
63             acceptChild(visitor, this.cursorName);
64         }
65         visitor.endVisit(this);
66     }
67 
68     override public List!SQLObject getChildren() {
69         return Collections.singletonList!SQLObject(this.cursorName);
70     }
71 
72 
73    override
74     public size_t toHash() @trusted nothrow {
75          int prime = 31;
76         size_t result = 1;
77         result = prime * result + ((cursorName is null) ? 0 : (cast(Object)cursorName).toHash());
78         return result;
79     }
80 
81    override
82     public bool opEquals(Object obj) {
83         if (this is obj) {
84             return true;
85         }
86         if (obj is null) {
87             return false;
88         }
89         if (typeid(this) != typeid(obj)) {
90             return false;
91         }
92         SQLCurrentOfCursorExpr other = cast(SQLCurrentOfCursorExpr) obj;
93         if (cursorName is null) {
94             if (other.cursorName !is null) {
95                 return false;
96             }
97         } else if (!(cast(Object)(cursorName)).opEquals(cast(Object)(other.cursorName))) {
98             return false;
99         }
100         return true;
101     }
102 
103 }