hunt.sql.ast.expr.SQLGroupingSetExpr 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.SQLGroupingSetExpr;
17 
18 
19 import hunt.sql.ast.SQLExpr;
20 import hunt.sql.ast.SQLExprImpl;
21 import hunt.sql.ast.SQLObject;
22 import hunt.sql.ast.statement.SQLExplainStatement;
23 import hunt.sql.visitor.SQLASTVisitor;
24 import hunt.collection;
25 
26 public class SQLGroupingSetExpr : SQLExprImpl {
27 
28     private  List!SQLExpr parameters;
29 
30     this()
31     {
32          parameters = new ArrayList!SQLExpr();
33     }
34 
35     override public SQLGroupingSetExpr clone() {
36         SQLGroupingSetExpr x = new SQLGroupingSetExpr();
37         foreach (SQLExpr p ; parameters) {
38             SQLExpr p2 = p.clone();
39             p2.setParent(x);
40             x.parameters.add(p2);
41         }
42         return x;
43     }
44 
45     public List!SQLExpr getParameters() {
46         return parameters;
47     }
48     
49     public void addParameter(SQLExpr parameter) {
50         if (parameter !is null) {
51             parameter.setParent(this);
52         }
53         this.parameters.add(parameter);
54     }
55 
56     override  protected void accept0(SQLASTVisitor visitor) {
57         if (visitor.visit(this)) {
58             acceptChild!SQLExpr(visitor, parameters);
59         }
60         visitor.endVisit(this);
61     }
62 
63    override
64     public List!SQLObject getChildren() {
65         return  cast(List!SQLObject)this.parameters;
66     }
67 
68    override
69     public size_t toHash() @trusted nothrow {
70          int prime = 31;
71         size_t result = 1;
72         result = prime * result + ((parameters is null) ? 0 : (cast(Object)parameters).toHash());
73         return result;
74     }
75 
76    override
77     public bool opEquals(Object obj) {
78         if (this is obj) {
79             return true;
80         }
81         if (obj is null) {
82             return false;
83         }
84         if (!(cast(SQLGroupingSetExpr)obj !is null)) {
85             return false;
86         }
87         SQLGroupingSetExpr other = cast(SQLGroupingSetExpr) obj;
88         if (parameters is null) {
89             if (other.parameters !is null) {
90                 return false;
91             }
92         } else if (!(cast(Object)(parameters)).opEquals(cast(Object)(other.parameters))) {
93             return false;
94         }
95         return true;
96     }
97 
98 }