-
Notifications
You must be signed in to change notification settings - Fork 1.9k
/
DmlArguments.java
104 lines (89 loc) · 2.96 KB
/
DmlArguments.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.ignite.internal.processors.query.h2.dml;
import org.apache.ignite.internal.processors.query.h2.sql.GridSqlConst;
import org.apache.ignite.internal.processors.query.h2.sql.GridSqlElement;
import org.apache.ignite.internal.processors.query.h2.sql.GridSqlParameter;
import org.jetbrains.annotations.Nullable;
/**
* DML arguments factory.
*/
public class DmlArguments {
/** Operand that always evaluates as {@code null}. */
private final static DmlArgument NULL_ARG = new ConstantArgument(null);
/**
* Create argument from AST element.
*
* @param el Element.
* @return DML argument.
*/
public static DmlArgument create(@Nullable GridSqlElement el) {
assert el == null ^ (el instanceof GridSqlConst || el instanceof GridSqlParameter);
if (el == null)
return NULL_ARG;
if (el instanceof GridSqlConst)
return new ConstantArgument(((GridSqlConst)el).value().getObject());
else
return new ParamArgument(((GridSqlParameter)el).index());
}
/**
* Private constructor.
*/
private DmlArguments() {
// No-op.
}
/**
* Value argument.
*/
private static class ConstantArgument implements DmlArgument {
/** Value to return. */
private final Object val;
/**
* Constructor.
*
* @param val Value.
*/
private ConstantArgument(Object val) {
this.val = val;
}
/** {@inheritDoc} */
public Object get(Object[] params) {
return val;
}
}
/**
* Parameter argument.
*/
private static class ParamArgument implements DmlArgument {
/** Value to return. */
private final int paramIdx;
/**
* Constructor.
*
* @param paramIdx Parameter index.
*/
private ParamArgument(int paramIdx) {
assert paramIdx >= 0;
this.paramIdx = paramIdx;
}
/** {@inheritDoc} */
@Override public Object get(Object[] params) {
assert params.length > paramIdx;
return params[paramIdx];
}
}
}