hunt.sql.ast.expr.SQLBinaryOpExprGroup 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.SQLBinaryOpExprGroup;
17 
18 import hunt.sql.SQLUtils;
19 import hunt.sql.ast.SQLExpr;
20 import hunt.sql.ast.SQLExprImpl;
21 import hunt.sql.ast.SQLObject;
22 import hunt.sql.visitor.SQLASTVisitor;
23 import hunt.sql.ast.expr.SQLBinaryOperator;
24 import hunt.collection;
25 
26 public class SQLBinaryOpExprGroup : SQLExprImpl {
27     private  SQLBinaryOperator operator;
28     private  List!SQLExpr items;
29     private string dbType;
30 
31     this()
32     {
33         items = new ArrayList!SQLExpr();
34     }
35     public this(SQLBinaryOperator operator) {
36         this();
37         this.operator = operator;
38     }
39 
40     public this(SQLBinaryOperator operator, string dbType) {
41         this();
42         this.operator = operator;
43         this.dbType = dbType;
44     }
45 
46    override
47     public bool opEquals(Object o) {
48         if (this == o) return true;
49         if (o is null || typeid(this) != typeid(o)) return false;
50 
51         SQLBinaryOpExprGroup that = cast(SQLBinaryOpExprGroup) o;
52 
53         if (operator != that.operator) return false;
54         return (cast(Object)items).opEquals(cast(Object)(that.items));
55     }
56 
57    override
58     public size_t toHash() @trusted nothrow {
59         size_t result = hashOf(operator);
60         result = 31 * result + (cast(Object)items).toHash();
61         return result;
62     }
63 
64     override  protected void accept0(SQLASTVisitor visitor) {
65         if (visitor.visit(this)) {
66             acceptChild!SQLExpr(visitor, this.items);
67         }
68 
69         visitor.endVisit(this);
70     }
71 
72    override
73     public SQLExpr clone() {
74         SQLBinaryOpExprGroup x = new SQLBinaryOpExprGroup(operator);
75 
76         foreach (SQLExpr item ; items) {
77             SQLExpr item2 = item.clone();
78             item2.setParent(this);
79             x.items.add(item2);
80         }
81 
82         return x;
83     }
84 
85    override
86     public List!SQLObject getChildren() {
87         return cast(List!SQLObject)items;
88     }
89 
90     public void add(SQLExpr item) {
91         if (item !is null) {
92             item.setParent(this);
93         }
94         this.items.add(item);
95     }
96 
97     public List!SQLExpr getItems() {
98         return this.items;
99     }
100 
101     public SQLBinaryOperator getOperator() {
102         return operator;
103     }
104 
105     override public string toString() {
106         return SQLUtils.toSQLString(this, dbType);
107     }
108 }