nashorn/samples/shell.js
author sundar
Wed, 07 May 2014 20:20:58 +0530
changeset 24283 bda887c0088a
parent 16151 97c1e756ae1e
child 26067 b32ccc3a76c9
permissions -rw-r--r--
8042600: Add more samples in nashorn/samples directory Reviewed-by: jlaskey, hannesw
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
16147
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
     1
/*
24283
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
     2
 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
16147
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
     3
 * 
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
     4
 * Redistribution and use in source and binary forms, with or without
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
     5
 * modification, are permitted provided that the following conditions
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
     6
 * are met:
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
     7
 * 
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
     8
 *   - Redistributions of source code must retain the above copyright
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
     9
 *     notice, this list of conditions and the following disclaimer.
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    10
 * 
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    11
 *   - Redistributions in binary form must reproduce the above copyright
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    12
 *     notice, this list of conditions and the following disclaimer in the
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    13
 *     documentation and/or other materials provided with the distribution.
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    14
 * 
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    15
 *   - Neither the name of Oracle nor the names of its
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    16
 *     contributors may be used to endorse or promote products derived
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    17
 *     from this software without specific prior written permission.
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    18
 * 
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    19
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    20
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    21
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    22
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    23
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    24
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    25
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    26
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    27
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    28
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    29
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    30
 */
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    31
24283
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    32
// Usage: jjs shell.js
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    33
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    34
/* This is a simple shell tool in JavaScript.
16147
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    35
 *
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    36
 * Runs any operating system command using Java "exec". When "eval" command is
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    37
 * used, evaluates argument(s) as JavaScript code.
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    38
 */
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    39
24283
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    40
(function() {
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    41
    // Java classes used
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    42
    var Arrays = Java.type("java.util.Arrays");
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    43
    var BufferedReader = Java.type("java.io.BufferedReader");
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    44
    var InputStreamReader = Java.type("java.io.InputStreamReader");
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    45
    var ProcessBuilder = Java.type("java.lang.ProcessBuilder");
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    46
    var System = Java.type("java.lang.System");
16147
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    47
24283
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    48
    // print prompt
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    49
    function prompt() {
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    50
        System.out.print("> ");
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    51
    }
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    52
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    53
    var reader = new BufferedReader(new InputStreamReader(System.in));
16147
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    54
    prompt();
24283
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    55
    // read and evaluate each line from stdin
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    56
    reader.lines().forEach(function(line) {
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    57
        if (! line.isEmpty()) {
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    58
            var args = line.split(' ');
16147
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    59
            try {
24283
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    60
                // special 'eval' command to evaluate JS code
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    61
                if (args[0] == 'eval') {
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    62
                    var code = line.substring('eval'.length);
16147
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    63
                    var res = eval(code);
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    64
                    if (res != undefined) {
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    65
                        print(res);
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    66
                    }
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    67
                } else {
24283
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    68
                    // build child process and start it!
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    69
                    new ProcessBuilder(Arrays.asList(args))
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    70
                        .inheritIO()
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    71
                        .start()
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    72
                        .waitFor();
16147
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    73
                }
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    74
            } catch (e) {
24283
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    75
                // print exception, if any
16147
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    76
                print(e);
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    77
            }
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    78
        }
e63b63819133 8005403: Open-source Nashorn
jlaskey
parents:
diff changeset
    79
        prompt();
24283
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    80
    })
bda887c0088a 8042600: Add more samples in nashorn/samples directory
sundar
parents: 16151
diff changeset
    81
})()