/*
* Copyright 2012 the original author or authors.
*
* 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.gradle.cache.internal;
import org.gradle.cache.PersistentStateCache;
import org.gradle.internal.Factory;
public class FileIntegrityViolationSuppressingPersistentStateCacheDecorator<T> implements PersistentStateCache<T> {
private final PersistentStateCache<T> delegate;
public FileIntegrityViolationSuppressingPersistentStateCacheDecorator(PersistentStateCache<T> delegate) {
this.delegate = delegate;
}
public T get() {
try {
return delegate.get();
} catch (FileIntegrityViolationException e) {
return null;
}
}
public void set(T newValue) {
delegate.set(newValue);
}
public T update(final UpdateAction<T> updateAction) {
return doUpdate(updateAction, new Factory<T>() {
@Override
public T create() {
return delegate.update(updateAction);
}
});
}
@Override
public T maybeUpdate(final UpdateAction<T> updateAction) {
return doUpdate(updateAction, new Factory<T>() {
@Override
public T create() {
return delegate.maybeUpdate(updateAction);
}
});
}
private T doUpdate(UpdateAction<T> updateAction, Factory<T> work) {
try {
return work.create();
} catch (FileIntegrityViolationException e) {
T newValue = updateAction.update(null);
set(newValue);
return newValue;
}
}
}