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 

    26 package jdk.nashorn.ant;

    27 

    28 import javax.script.ScriptEngine;

    29 import javax.script.ScriptEngineManager;

    30 import javax.script.ScriptException;

    31 import org.apache.tools.ant.Project;

    32 import org.apache.tools.ant.Task;

    33 import org.apache.tools.ant.BuildException;

    34 

    35 /**

    36  * This class implements an ant task to evaluate nashorn scripts

    37  * from ant projects.

    38  */

    39 public 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 }