package org.apache.maven.surefire.extensions;

/*
 * 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.
 */

import org.apache.maven.surefire.booter.Command;

import java.io.Closeable;
import java.io.IOException;

/**
 * Stream reader returns bytes which ar finally sent to the forked jvm.
 *
 * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a>
 * @since 3.0.0-M4
 */
public interface CommandReader extends Closeable
{

    /**
     * Waits for the next command and returns it.
     *
     * @return the command, or null if closed
     */
    Command readNextCommand() throws IOException;
    @Override
    void close();
    boolean isClosed();
    void tryFlush() throws IOException;
}