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Java > Open Source Codes > com > sun > sample > scriptpad > Main


1 /*
2 * @(#)Main.java 1.1 06/08/06
3 *
4 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * -Redistribution of source code must retain the above copyright notice, this
10 * list of conditions and the following disclaimer.
11 *
12 * -Redistribution in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
17 * be used to endorse or promote products derived from this software without
18 * specific prior written permission.
19 *
20 * This software is provided "AS IS," without a warranty of any kind. ALL
21 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
22 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
23 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
24 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
25 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
26 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
27 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
28 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
29 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
30 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
31 *
32 * You acknowledge that this software is not designed, licensed or intended
33 * for use in the design, construction, operation or maintenance of any
34 * nuclear facility.
35 */
36
37 package com.sun.sample.scriptpad;
38
39 import javax.script.*;
40 import java.io.*;
41
42 /**
43  * This is the entry point of "Scriptpad" sample. This class creates
44  * ScriptEngine and evaluates few JavaScript "files" -- which are stored
45  * as resources (please refer to src/resources/*.js). Actual code for the
46  * scriptpad's main functionality lives in these JavaScript files.
47  */
48 public class Main {
49     public static void main(String JavaDoc[] args) throws Exception JavaDoc {
50
51         // create a ScriptEngineManager
52 ScriptEngineManager m = new ScriptEngineManager();
53         // get an instance of JavaScript script engine
54 ScriptEngine engine = m.getEngineByName("js");
55
56         // expose the current script engine as a global variable
57 engine.put("engine", engine);
58
59         // evaluate few scripts that are bundled in "resources"
60 eval(engine, "conc.js");
61         eval(engine, "gui.js");
62         eval(engine, "scriptpad.js");
63         eval(engine, "mm.js");
64     }
65
66     private static void eval(ScriptEngine engine, String JavaDoc name)
67                             throws Exception JavaDoc {
68         /*
69          * This class is compiled into a jar file. The jar file
70          * contains few scripts under /resources URL.
71          */
72         InputStream is = Main.class.getResourceAsStream("/resources/" + name);
73         // current script file name for better error messages
74 engine.put(ScriptEngine.NAME, name);
75         // evaluate the script in the InputStream
76 engine.eval(new InputStreamReader(is));
77     }
78 }
79
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