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/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 java.nio.channels;

import java.io.IOException;
import java.nio.channels.spi.AbstractInterruptibleChannel;
import java.nio.channels.spi.SelectorProvider;

public abstract class SelectableChannel extends AbstractInterruptibleChannel implements Channel {
	protected SelectableChannel() {
	}

	public abstract SelectorProvider provider();

	public abstract int validOps();

	public abstract boolean isRegistered();

	public abstract SelectionKey keyFor(Selector sel);

	public abstract SelectionKey register(Selector sel, int ops, Object att) throws ClosedChannelException;

	public final SelectionKey register(Selector sel, int ops) throws ClosedChannelException {
		return register(sel, ops, null);
	}

	public abstract SelectableChannel configureBlocking(boolean block) throws IOException;

	public abstract boolean isBlocking();

	public abstract Object blockingLock();
}