--- /dev/null 2019-11-18 20:49:31.000000000 -0500 +++ new/src/jdk.incubator.jpackage/share/classes/jdk/incubator/jpackage/ToolProviderFactory.java 2019-11-18 20:49:28.476601700 -0500 @@ -0,0 +1,69 @@ +/* + * Copyright (c) 2019, 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 + * 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.incubator.jpackage; + +import jdk.incubator.jpackage.internal.JPackageToolProvider; +import java.io.PrintWriter; +import java.util.Optional; +import java.util.spi.ToolProvider; + +/** + * A factory class to obtain a {@linkplain ToolProvider tool provider} + * for the incubating {@code jpackage} tool. + * + * It is planned to implement {@code jpackage} tool as a service provider + * to {@link ToolProvider} in a future release at which point + * {@link ToolProvider#findFirst} can be used to look up jpackage tool. + * + * @since 14 + */ + +public class ToolProviderFactory { + + private static ToolProvider provider = new JPackageToolProvider(); + + // Prevent creating an instance of this class + private ToolProviderFactory() { + } + + /** + * Returns an {@link Optional} containing the {@code ToolProvider} + * if the given toolname is "jpackage". Returns an empty + * {@code Optional} if the given toolname is not "jpackage". + * + * @param toolname {@code String} name of tool to look for. + * @return an {@link Optional} containing the {@code ToolPovider} + * + * @since 14 + */ + public static Optional findFirst(String toolName) { + if ("jpackage".equals(toolName)) { + return Optional.of(provider); + } else { + return Optional.empty(); + } + } + +}