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/*
* Copyright (C) 2010 The Android Open Source Project
*
* 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.android.contacts.common.vcard;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.RunnableFuture;
import java.util.concurrent.TimeUnit;
/**
* A base processor class. One instance processes vCard one import/export request (imports a given
* vCard or exports a vCard). Expected to be used with {@link ExecutorService}.
*
* This instance starts itself with {@link #run()} method, and can be cancelled with
* {@link #cancel(boolean)}. Users can check the processor's status using {@link #isCancelled()}
* and {@link #isDone()} asynchronously.
*
* {@link #get()} and {@link #get(long, TimeUnit)}, which are form {@link Future}, aren't
* supported and {@link UnsupportedOperationException} will be just thrown when they are called.
*/
public abstract class ProcessorBase implements RunnableFuture<Object> {
/**
* @return the type of the processor. Must be {@link VCardService#TYPE_IMPORT} or
* {@link VCardService#TYPE_EXPORT}.
*/
public abstract int getType();
@Override
public abstract void run();
/**
* Cancels this operation.
*
* @param mayInterruptIfRunning ignored. When this method is called, the instance
* stops processing and finish itself even if the thread is running.
*
* @see Future#cancel(boolean)
*/
@Override
public abstract boolean cancel(boolean mayInterruptIfRunning);
@Override
public abstract boolean isCancelled();
@Override
public abstract boolean isDone();
/**
* Just throws {@link UnsupportedOperationException}.
*/
@Override
public final Object get() {
throw new UnsupportedOperationException();
}
/**
* Just throws {@link UnsupportedOperationException}.
*/
@Override
public final Object get(long timeout, TimeUnit unit) {
throw new UnsupportedOperationException();
}
}
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