1 /*
   2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * published by the Free Software Foundation.  Oracle designates this
   7  * particular file as subject to the "Classpath" exception as provided
   8  * by Oracle in the LICENSE file that accompanied this code.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  */
  24 
  25 package jdk.incubator.jpackage;
  26 
  27 import jdk.incubator.jpackage.internal.JPackageToolProvider;
  28 import java.io.PrintWriter;
  29 import java.util.Optional;
  30 import java.util.spi.ToolProvider;
  31 
  32 /**
  33  * A factory class to obtain a {@linkplain ToolProvider tool provider}
  34  * for the incubating {@code jpackage} tool.
  35  * 
  36  * It is planned to implement {@code jpackage} tool as a service provider
  37  * to {@link ToolProvider} in a future release at which point
  38  * {@link ToolProvider#findFirst} can be used to look up jpackage tool.
  39  *
  40  * @since   14
  41  */
  42 
  43 public class ToolProviderFactory { 
  44 
  45     private static ToolProvider provider = new JPackageToolProvider();
  46 
  47     // Prevent creating an instance of this class
  48     private ToolProviderFactory() {
  49     }
  50 
  51     /**
  52      * Returns an {@link Optional} containing the {@code ToolProvider}
  53      * if the given toolname is "jpackage". Returns an empty
  54      * {@code Optional} if the given toolname is not "jpackage".
  55      *
  56      * @param   toolname {@code String} name of tool to look for.
  57      * @return  an {@link Optional} containing the {@code ToolPovider}
  58      *
  59      * @since 14
  60      */
  61     public static Optional<ToolProvider> findFirst(String toolName) {
  62         if ("jpackage".equals(toolName)) {
  63             return Optional.of(provider);
  64         } else {
  65             return Optional.empty();
  66         }
  67     } 
  68 
  69 }