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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
// Copyright 2014 The Bazel Authors. All rights reserved.
//
// Licensed 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 com.google.devtools.build.skyframe;
import javax.annotation.Nullable;
/** Wrapper for a value or the typed exception thrown when trying to compute it. */
public abstract class ValueOrException3<E1 extends Exception, E2 extends Exception,
E3 extends Exception> extends ValueOrUntypedException {
/** Gets the stored value. Throws an exception if one was thrown when computing this value. */
@Nullable
public abstract SkyValue get() throws E1, E2, E3;
static <E1 extends Exception, E2 extends Exception, E3 extends Exception>
ValueOrException3<E1, E2, E3> fromUntypedException(
ValueOrUntypedException voe,
Class<E1> exceptionClass1,
Class<E2> exceptionClass2,
Class<E3> exceptionClass3) {
SkyValue value = voe.getValue();
if (value != null) {
return ofValue(value);
}
Exception e = voe.getException();
if (e != null) {
if (exceptionClass1.isInstance(e)) {
return ofExn1(exceptionClass1.cast(e));
}
if (exceptionClass2.isInstance(e)) {
return ofExn2(exceptionClass2.cast(e));
}
if (exceptionClass3.isInstance(e)) {
return ofExn3(exceptionClass3.cast(e));
}
}
return ofNullValue();
}
private static <E1 extends Exception, E2 extends Exception, E3 extends Exception>
ValueOrException3<E1, E2, E3> ofNullValue() {
return ValueOrException3ValueImpl.ofNullValue();
}
private static <E1 extends Exception, E2 extends Exception, E3 extends Exception>
ValueOrException3<E1, E2, E3> ofValue(SkyValue value) {
return new ValueOrException3ValueImpl<>(value);
}
private static <E1 extends Exception, E2 extends Exception, E3 extends Exception>
ValueOrException3<E1, E2, E3> ofExn1(E1 e) {
return new ValueOrException3Exn1Impl<>(e);
}
private static <E1 extends Exception, E2 extends Exception, E3 extends Exception>
ValueOrException3<E1, E2, E3> ofExn2(E2 e) {
return new ValueOrException3Exn2Impl<>(e);
}
private static <E1 extends Exception, E2 extends Exception, E3 extends Exception>
ValueOrException3<E1, E2, E3> ofExn3(E3 e) {
return new ValueOrException3Exn3Impl<>(e);
}
private static class ValueOrException3ValueImpl<
E1 extends Exception, E2 extends Exception, E3 extends Exception>
extends ValueOrException3<E1, E2, E3> {
private static final ValueOrException3ValueImpl<Exception, Exception, Exception> NULL =
new ValueOrException3ValueImpl<>(null);
@Nullable private final SkyValue value;
ValueOrException3ValueImpl(@Nullable SkyValue value) {
this.value = value;
}
@Override
@Nullable
public SkyValue get() {
return value;
}
@Override
@Nullable
public Exception getException() {
return null;
}
@Override
@Nullable
public SkyValue getValue() {
return value;
}
@SuppressWarnings("unchecked")
static <E1 extends Exception, E2 extends Exception, E3 extends Exception>
ValueOrException3ValueImpl<E1, E2, E3> ofNullValue() {
return (ValueOrException3ValueImpl<E1, E2, E3>) NULL;
}
}
private static class ValueOrException3Exn1Impl<
E1 extends Exception, E2 extends Exception, E3 extends Exception>
extends ValueOrException3<E1, E2, E3> {
private final E1 e;
private ValueOrException3Exn1Impl(E1 e) {
this.e = e;
}
@Override
public SkyValue get() throws E1 {
throw e;
}
@Override
public Exception getException() {
return e;
}
@Override
@Nullable
public SkyValue getValue() {
return null;
}
}
private static class ValueOrException3Exn2Impl<
E1 extends Exception, E2 extends Exception, E3 extends Exception>
extends ValueOrException3<E1, E2, E3> {
private final E2 e;
private ValueOrException3Exn2Impl(E2 e) {
this.e = e;
}
@Override
public SkyValue get() throws E2 {
throw e;
}
@Override
public Exception getException() {
return e;
}
@Override
@Nullable
public SkyValue getValue() {
return null;
}
}
private static class ValueOrException3Exn3Impl<
E1 extends Exception, E2 extends Exception, E3 extends Exception>
extends ValueOrException3<E1, E2, E3> {
private final E3 e;
private ValueOrException3Exn3Impl(E3 e) {
this.e = e;
}
@Override
public SkyValue get() throws E3 {
throw e;
}
@Override
public Exception getException() {
return e;
}
@Override
@Nullable
public SkyValue getValue() {
return null;
}
}
}
|
