/*

 * 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.util.ArrayList;

import java.util.Arrays;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

/**

 * A task to configure and run the native header tool, javah.

 */

public class JavahTask extends AbstractTask<JavahTask> {

    private String classpath;

    private List<String> options;

    private List<String> classes;

    /**

     * Create a task to execute {@code javah} using {@code CMDLINE} mode.

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

     */

    public JavahTask(ToolBox toolBox) {

        super(toolBox, Task.Mode.CMDLINE);

    }

    /**

     * Sets the classpath.

     * @param classpath the classpath

     * @return this task object

     */

    public JavahTask classpath(String classpath) {

        this.classpath = classpath;

        return this;

    }

    /**

     * Sets the options.

     * @param options the options

     * @return this task object

     */

    public JavahTask options(String... options) {

        this.options = Arrays.asList(options);

        return this;

    }

    /**

     * Sets the classes to be analyzed.

     * @param classes the classes

     * @return this task object

     */

    public JavahTask classes(String... classes) {

        this.classes = Arrays.asList(classes);

        return this;

    }

    /**

     * {@inheritDoc}

     * @return the name "javah"

     */

    @Override

    public String name() {

        return "javah";

    }

    /**

     * Calls the javah tool 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, stderr, or the

     * main stream provided to the task.

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

     */

    @Override

    public Task.Result run() {

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

        if (options != null)

            args.addAll(options);

        if (classpath != null) {

            args.add("-classpath");

            args.add(classpath);

        }

        if (classes != null)

            args.addAll(classes);

        AbstractTask.WriterOutput direct = new AbstractTask.WriterOutput();

        // These are to catch output to System.out and System.err,

        // in case these are used instead of the primary streams

        AbstractTask.StreamOutput sysOut = new AbstractTask.StreamOutput(System.out, System::setOut);

        AbstractTask.StreamOutput sysErr = new AbstractTask.StreamOutput(System.err, System::setErr);

        int rc;

        Map<Task.OutputKind, String> outputMap = new HashMap<>();

        try {

            rc = com.sun.tools.javah.Main.run(args.toArray(new String[args.size()]), direct.pw);

        } finally {

            outputMap.put(Task.OutputKind.STDOUT, sysOut.close());

            outputMap.put(Task.OutputKind.STDERR, sysErr.close());

            outputMap.put(Task.OutputKind.DIRECT, direct.close());

        }

        return checkExit(new Task.Result(toolBox, this, rc, outputMap));

    }

}