org.jetbrains.kotlin.utils.WrappedValues Maven / Gradle / Ivy
/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* 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 org.jetbrains.kotlin.utils;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
public class WrappedValues {
private static final Object NULL_VALUE = new Object() {
@Override
public String toString() {
return "NULL_VALUE";
}
};
public static volatile boolean throwWrappedProcessCanceledException = false;
private final static class ThrowableWrapper {
private final Throwable throwable;
private ThrowableWrapper(@NotNull Throwable throwable) {
this.throwable = throwable;
}
@NotNull
public Throwable getThrowable() {
return throwable;
}
@Override
public String toString() {
return throwable.toString();
}
}
private WrappedValues() {
}
@Nullable
@SuppressWarnings("unchecked")
public static V unescapeNull(@NotNull Object value) {
if (value == NULL_VALUE) return null;
return (V) value;
}
@NotNull
public static Object escapeNull(@Nullable V value) {
if (value == null) return NULL_VALUE;
return value;
}
@NotNull
public static Object escapeThrowable(@NotNull Throwable throwable) {
return new ThrowableWrapper(throwable);
}
@Nullable
public static V unescapeExceptionOrNull(@NotNull Object value) {
return unescapeNull(unescapeThrowable(value));
}
@Nullable
public static V unescapeThrowable(@Nullable Object value) {
if (value instanceof ThrowableWrapper) {
Throwable originThrowable = ((ThrowableWrapper) value).getThrowable();
if (throwWrappedProcessCanceledException &&
originThrowable.getClass().getName().equals("com.intellij.openapi.progress.ProcessCanceledException")) {
throw new WrappedProcessCanceledException(originThrowable);
}
throw ExceptionUtilsKt.rethrow(originThrowable);
}
//noinspection unchecked
return (V) value;
}
public static class WrappedProcessCanceledException extends RuntimeException {
public WrappedProcessCanceledException(Throwable cause) {
super("Rethrow stored exception", cause);
}
}
}