platform/platform-api/src/com/intellij/openapi/util/ExpirableRunnable.java

/*
 * Copyright 2000-2010 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 com.intellij.openapi.util;

import com.intellij.openapi.project.Project;
import org.jetbrains.annotations.Nullable;

public interface ExpirableRunnable extends Runnable, Expirable  {

  abstract class ForProject implements ExpirableRunnable {
    private final Project myProject;

    protected ForProject(@Nullable Project project) {
      myProject = project;
    }

    @Override
    public boolean isExpired() {
      return myProject == null || myProject.isDisposed();
    }
  }

  abstract class AlwaysValid implements ExpirableRunnable {
    @Override
    public boolean isExpired() {
      return false;
    }
  }

}