1/*
2 * Copyright (c) 2010, 2013, 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 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.ant;
27
28import javax.script.ScriptEngine;
29import javax.script.ScriptEngineManager;
30import javax.script.ScriptException;
31import org.apache.tools.ant.Project;
32import org.apache.tools.ant.Task;
33import org.apache.tools.ant.BuildException;
34
35/**
36 * This class implements an ant task to evaluate nashorn scripts
37 * from ant projects.
38 */
39public final class NashornTask extends Task {
40    // Underlying nashorn script engine
41    private final ScriptEngine engine;
42    // the current ant project
43    private Project project;
44    // the script evaluated by this task
45    private String script;
46
47    public NashornTask() {
48        final ScriptEngineManager m = new ScriptEngineManager();
49        this.engine = m.getEngineByName("nashorn");
50    }
51
52    @Override
53    public void setProject(Project proj) {
54        this.project = proj;
55    }
56
57    // set the script to be evaluated
58    public void addText(String text) {
59        this.script = text;
60    }
61
62    @Override
63    public void execute() {
64        // expose project as "project" variable
65        engine.put("project", project);
66        // expose this task as "self" variable
67        engine.put("self", this);
68
69        // evaluate specified script
70        try {
71            engine.eval(script);
72        } catch (final ScriptException se) {
73            throw new BuildException(se);
74        }
75    }
76}
77