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// 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 ValueOrException5<E1 extends Exception, E2 extends Exception,
E3 extends Exception, E4 extends Exception, E5 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, E4, E5;
static <
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
ValueOrException5<E1, E2, E3, E4, E5> fromUntypedException(
ValueOrUntypedException voe,
Class<E1> exceptionClass1,
Class<E2> exceptionClass2,
Class<E3> exceptionClass3,
Class<E4> exceptionClass4,
Class<E5> exceptionClass5) {
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));
}
if (exceptionClass4.isInstance(e)) {
return ofExn4(exceptionClass4.cast(e));
}
if (exceptionClass5.isInstance(e)) {
return ofExn5(exceptionClass5.cast(e));
}
}
return ofNullValue();
}
private static <
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
ValueOrException5<E1, E2, E3, E4, E5> ofNullValue() {
return ValueOrException5ValueImpl.ofNullValue();
}
private static <
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
ValueOrException5<E1, E2, E3, E4, E5> ofValue(SkyValue value) {
return new ValueOrException5ValueImpl<>(value);
}
private static <
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
ValueOrException5<E1, E2, E3, E4, E5> ofExn1(E1 e) {
return new ValueOrException5Exn1Impl<>(e);
}
private static <
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
ValueOrException5<E1, E2, E3, E4, E5> ofExn2(E2 e) {
return new ValueOrException5Exn2Impl<>(e);
}
private static <
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
ValueOrException5<E1, E2, E3, E4, E5> ofExn3(E3 e) {
return new ValueOrException5Exn3Impl<>(e);
}
private static <
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
ValueOrException5<E1, E2, E3, E4, E5> ofExn4(E4 e) {
return new ValueOrException5Exn4Impl<>(e);
}
private static <
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
ValueOrException5<E1, E2, E3, E4, E5> ofExn5(E5 e) {
return new ValueOrException5Exn5Impl<>(e);
}
private static class ValueOrException5ValueImpl<
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
extends ValueOrException5<E1, E2, E3, E4, E5> {
private static final ValueOrException5ValueImpl<
Exception, Exception, Exception, Exception, Exception>
NULL = new ValueOrException5ValueImpl<>(null);
@Nullable private final SkyValue value;
ValueOrException5ValueImpl(@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,
E4 extends Exception,
E5 extends Exception>
ValueOrException5ValueImpl<E1, E2, E3, E4, E5> ofNullValue() {
return (ValueOrException5ValueImpl<E1, E2, E3, E4, E5>) NULL;
}
}
private static class ValueOrException5Exn1Impl<
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
extends ValueOrException5<E1, E2, E3, E4, E5> {
private final E1 e;
private ValueOrException5Exn1Impl(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 ValueOrException5Exn2Impl<
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
extends ValueOrException5<E1, E2, E3, E4, E5> {
private final E2 e;
private ValueOrException5Exn2Impl(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 ValueOrException5Exn3Impl<
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
extends ValueOrException5<E1, E2, E3, E4, E5> {
private final E3 e;
private ValueOrException5Exn3Impl(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;
}
}
private static class ValueOrException5Exn4Impl<
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
extends ValueOrException5<E1, E2, E3, E4, E5> {
private final E4 e;
private ValueOrException5Exn4Impl(E4 e) {
this.e = e;
}
@Override
public SkyValue get() throws E4 {
throw e;
}
@Override
public Exception getException() {
return e;
}
@Override
@Nullable
public SkyValue getValue() {
return null;
}
}
private static class ValueOrException5Exn5Impl<
E1 extends Exception,
E2 extends Exception,
E3 extends Exception,
E4 extends Exception,
E5 extends Exception>
extends ValueOrException5<E1, E2, E3, E4, E5> {
private final E5 e;
private ValueOrException5Exn5Impl(E5 e) {
this.e = e;
}
@Override
public SkyValue get() throws E5 {
throw e;
}
@Override
public Exception getException() {
return e;
}
@Override
@Nullable
public SkyValue getValue() {
return null;
}
}
}
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