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