--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/tools/jpackage/helpers/jdk/jpackage/test/JavaAppDesc.java	Wed Oct 16 10:32:08 2019 -0400
@@ -0,0 +1,169 @@
+/*
+ * 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
+ * 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 jdk.jpackage.test;
+
+import java.util.Objects;
+
+
+public final class JavaAppDesc {
+    public JavaAppDesc() {
+    }
+
+    public JavaAppDesc setClassName(String v) {
+        qualifiedClassName = v;
+        return this;
+    }
+
+    public JavaAppDesc setModuleName(String v) {
+        moduleName = v;
+        return this;
+    }
+
+    public JavaAppDesc setJarFileName(String v) {
+        jarFileName = v;
+        return this;
+    }
+
+    public JavaAppDesc setModuleVersion(String v) {
+        moduleVersion = v;
+        return this;
+    }
+
+    public JavaAppDesc setJarWithMainClass(boolean v) {
+        jarWithMainClass = v;
+        return this;
+    }
+
+    public String className() {
+        return qualifiedClassName;
+    }
+
+    public String moduleName() {
+        return moduleName;
+    }
+
+    public String packageName() {
+        int lastDotIdx = qualifiedClassName.lastIndexOf('.');
+        if (lastDotIdx == -1) {
+            return null;
+        }
+        return qualifiedClassName.substring(0, lastDotIdx);
+    }
+
+    public String jarFileName() {
+        return jarFileName;
+    }
+
+    public String moduleVersion() {
+        return moduleVersion;
+    }
+
+    public boolean jarWithMainClass() {
+        return jarWithMainClass;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        if (jarFileName != null) {
+            sb.append(jarFileName).append(':');
+        }
+        if (moduleName != null) {
+            sb.append(moduleName).append('/');
+        }
+        if (qualifiedClassName != null) {
+            sb.append(qualifiedClassName);
+        }
+        if (jarWithMainClass) {
+            sb.append('!');
+        }
+        if (moduleVersion != null) {
+            sb.append('@').append(moduleVersion);
+        }
+        return sb.toString();
+    }
+
+    /**
+     * Create Java application description form encoded string value.
+     *
+     * Syntax of encoded Java application description is
+     * [jar_file:][module_name/]qualified_class_name[!][@module_version].
+     *
+     * E.g.: `duke.jar:com.other/com.other.foo.bar.Buz!@3.7` encodes modular
+     * application. Module name is `com.other`. Main class is
+     * `com.other.foo.bar.Buz`. Module version is `3.7`. Application will be
+     * compiled and packed in `duke.jar` jar file. jar command will set module
+     * version (3.7) and main class (Buz) attributes in the jar file.
+     *
+     * E.g.: `Ciao` encodes non-modular `Ciao` class in the default package.
+     * jar command will not put main class attribute in the jar file.
+     * Default name will be picked for jar file - `hello.jar`.
+     *
+     * @param cmd jpackage command to configure
+     * @param javaAppDesc encoded Java application description
+     */
+    public static JavaAppDesc parse(String javaAppDesc) {
+        JavaAppDesc desc = HelloApp.createDefaltAppDesc();
+
+        if (javaAppDesc == null) {
+            return desc;
+        }
+
+        String moduleNameAndOther = Functional.identity(() -> {
+            String[] components = javaAppDesc.split(":", 2);
+            if (components.length == 2) {
+                desc.setJarFileName(components[0]);
+            }
+            return components[components.length - 1];
+        }).get();
+
+        String classNameAndOther = Functional.identity(() -> {
+            String[] components = moduleNameAndOther.split("/", 2);
+            if (components.length == 2) {
+                desc.setModuleName(components[0]);
+            }
+            return components[components.length - 1];
+        }).get();
+
+        Functional.identity(() -> {
+            String[] components = classNameAndOther.split("@", 2);
+            if (components[0].endsWith("!")) {
+                components[0] = components[0].substring(0,
+                        components[0].length() - 1);
+                desc.setJarWithMainClass(true);
+            }
+            desc.setClassName(components[0]);
+            if (components.length == 2) {
+                desc.setModuleVersion(components[1]);
+            }
+        }).run();
+
+        return desc;
+    }
+
+    private String qualifiedClassName;
+    private String moduleName;
+    private String jarFileName;
+    private String moduleVersion;
+    private boolean jarWithMainClass;
+}