/*

 * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package toolbox;

import java.io.IOException;

import java.nio.file.Path;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

/**

 * A task to configure and run a general command.

 */

public class ExecTask extends AbstractTask<ExecTask> {

    private final String command;

    private List<String> args;

    /**

     * Create a task to execute a given command, to be run using {@code EXEC} mode.

     * @param toolBox the {@code ToolBox} to use

     * @param command the command to be executed

     */

    public ExecTask(ToolBox toolBox, String command) {

        super(toolBox, Task.Mode.EXEC);

        this.command = command;

    }

    /**

     * Create a task to execute a given command, to be run using {@code EXEC} mode.

     * @param toolBox the {@code ToolBox} to use

     * @param command the command to be executed

     */

    public ExecTask(ToolBox toolBox, Path command) {

        super(toolBox, Task.Mode.EXEC);

        this.command = command.toString();

    }

    /**

     * Sets the arguments for the command to be executed

     * @param args the arguments

     * @return this task object

     */

    public ExecTask args(String... args) {

        this.args = Arrays.asList(args);

        return this;

    }

    /**

     * {@inheritDoc}

     * @return the name "exec"

     */

    @Override

    public String name() {

        return "exec";

    }

    /**

     * Calls the command with the arguments as currently configured.

     * @return a Result object indicating the outcome of the task

     * and the content of any output written to stdout or stderr.

     * @throws TaskError if the outcome of the task is not as expected.

     */

    @Override

    public Task.Result run() {

        List<String> cmdArgs = new ArrayList<>();

        cmdArgs.add(command);

        if (args != null)

            cmdArgs.addAll(args);

        ProcessBuilder pb = getProcessBuilder();

        pb.command(cmdArgs);

        try {

            return runProcess(toolBox, this, pb.start());

        } catch (IOException | InterruptedException e) {

            throw new Error(e);

        }

    }

}