JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2000, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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 jdk.javadoc.internal.tool;

import java.io.PrintWriter;

/**
 * Provides external entry points (tool and programmatic) for the javadoc program.
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 */

public class Main {

    /**
     * Constructor should never be called.
     */
    private Main() {}

    /**
     * The main entry point called by the launcher. This will call
     * System.exit with an appropriate return value.
     *
     * @param args The command line parameters.
     */
    public static void main(String... args) {
        System.exit(execute(args));
    }

    /**
     * Programmatic interface.
     *
     * @param args The command line parameters.
     * @return The return code.
     */
    public static int execute(String... args) {
        Start jdoc = new Start();
        return jdoc.begin(args).exitCode;
    }

    /**
     * Programmatic interface.
     *
     * @param writer a stream for all output
     * @param args The command line parameters.
     * @return The return code.
     */
    public static int execute(String[] args, PrintWriter writer) {
        Start jdoc = new Start(writer, writer);
        return jdoc.begin(args).exitCode;
    }

    /**
     * Programmatic interface.
     *
     * @param outWriter a stream for expected output
     * @param errWriter a stream for diagnostic output
     * @param args The command line parameters.
     * @return The return code.
     */
    public static int execute(String[] args, PrintWriter outWriter, PrintWriter errWriter) {
        Start jdoc = new Start(outWriter, errWriter);
        return jdoc.begin(args).exitCode;
    }

    public static enum Result {
        /** completed with no errors */
        OK(0),
        /** Completed with reported errors */
        ERROR(1),
        /** Bad command-line arguments */
        CMDERR(2),
        /** System error or resource exhaustion */
        SYSERR(3),
        /** Terminated abnormally */
        ABNORMAL(4);


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