Mercurial > jdk8-mips64-public > nashorn / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/samples/find_max_lines.js	Fri Sep 04 17:17:44 2015 +0530
     1.3 @@ -0,0 +1,59 @@
     1.4 +/*
     1.5 + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
     1.6 + *
     1.7 + * Redistribution and use in source and binary forms, with or without
     1.8 + * modification, are permitted provided that the following conditions
     1.9 + * are met:
    1.10 + *
    1.11 + *   - Redistributions of source code must retain the above copyright
    1.12 + *     notice, this list of conditions and the following disclaimer.
    1.13 + *
    1.14 + *   - Redistributions in binary form must reproduce the above copyright
    1.15 + *     notice, this list of conditions and the following disclaimer in the
    1.16 + *     documentation and/or other materials provided with the distribution.
    1.17 + *
    1.18 + *   - Neither the name of Oracle nor the names of its
    1.19 + *     contributors may be used to endorse or promote products derived
    1.20 + *     from this software without specific prior written permission.
    1.21 + *
    1.22 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
    1.23 + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
    1.24 + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
    1.25 + * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
    1.26 + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
    1.27 + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
    1.28 + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
    1.29 + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
    1.30 + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
    1.31 + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
    1.32 + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    1.33 + */
    1.34 +
    1.35 +// Find the file with maximum number of lines
    1.36 +
    1.37 +var Files = Java.type("java.nio.file.Files");
    1.38 +var Integer = Java.type("java.lang.Integer");
    1.39 +var Paths = Java.type("java.nio.file.Paths");
    1.40 +
    1.41 +var file = arguments.length == 0? "." : arguments[0];
    1.42 +var ext = arguments.length > 1? arguments[1] : ".java";
    1.43 +var path = Paths.get(file);
    1.44 +
    1.45 +// return number of lines in given Path (that represents a file)
    1.46 +function lines(p) {
    1.47 +    var strm = Files.lines(p);
    1.48 +    try {
    1.49 +        return strm.count();
    1.50 +    } finally {
    1.51 +        strm.close();
    1.52 +    }
    1.53 +}
    1.54 +
    1.55 +// walk files, map to file and lines, find the max    
    1.56 +var obj = Files.find(path, Integer.MAX_VALUE, 
    1.57 +    function(p, a) !p.toFile().isDirectory() && p.toString().endsWith(ext)).
    1.58 +map(function(p) ({ path : p, lines: lines(p) })).
    1.59 +max(function(x, y) x.lines - y.lines).get();
    1.60 +
    1.61 +// print path and lines of the max line file
    1.62 +print(obj.path, obj.lines);