hunt.sql.ast.expr.SQLListExpr 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.SQLListExpr;
17 
18 
19 
20 import hunt.sql.ast.SQLExpr;
21 import hunt.sql.ast.SQLExprImpl;
22 import hunt.sql.ast.SQLObject;
23 import hunt.collection;
24 import hunt.sql.visitor.SQLASTVisitor;
25 
26 public class SQLListExpr : SQLExprImpl {
27 
28     private  List!SQLExpr items;
29 
30     this()
31     {
32         items = new ArrayList!SQLExpr();
33     }
34 
35     public List!SQLExpr getItems() {
36         return items;
37     }
38     
39     public void addItem(SQLExpr item) {
40         if (item !is null) {
41             item.setParent(this);
42         }
43         this.items.add(item);
44     }
45 
46     override  protected void accept0(SQLASTVisitor visitor) {
47         if (visitor.visit(this)) {
48             acceptChild!SQLExpr(visitor, items);
49         }
50         visitor.endVisit(this);
51     }
52 
53    override
54     public size_t toHash() @trusted nothrow {
55          int prime = 31;
56         size_t result = 1;
57         result = prime * result + ((items is null) ? 0 : (cast(Object)items).toHash());
58         return result;
59     }
60 
61    override
62     public bool opEquals(Object obj) {
63         if (this is obj) {
64             return true;
65         }
66         if (obj is null) {
67             return false;
68         }
69         if (typeid(this) != typeid(obj)) {
70             return false;
71         }
72         SQLListExpr other = cast(SQLListExpr) obj;
73         if (items is null) {
74             if (other.items !is null) {
75                 return false;
76             }
77         } else if (!(cast(Object)(items)).opEquals(cast(Object)(other.items))) {
78             return false;
79         }
80         return true;
81     }
82 
83     public override SQLListExpr clone() {
84         SQLListExpr x = new SQLListExpr();
85         foreach (SQLExpr item ; items) {
86             SQLExpr item2 = item.clone();
87             item2.setParent(x);
88             x.items.add(item2);
89         }
90         return x;
91     }
92 
93     public override List!SQLObject getChildren() {
94         return cast(List!SQLObject)this.items;
95     }
96 }