/*
* Copyright (c) 2013, the Dart project authors.
*
* Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
*
* 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.dart.engine.internal.cache;
/**
* The enumerated type {@code RetentionPriority} represents the priority of data in the cache in
* terms of the desirability of retaining some specified data about a specified source.
*/
public enum RetentionPriority {
/**
* A priority indicating that a given piece of data can be removed from the cache without
* reservation.
*/
LOW,
/**
* A priority indicating that a given piece of data should not be removed from the cache unless
* there are no sources for which the corresponding data has a lower priority. Currently used for
* data that is needed in order to finish some outstanding analysis task.
*/
MEDIUM,
/**
* A priority indicating that a given piece of data should not be removed from the cache.
* Currently used for data related to a priority source.
*/
HIGH;
}