1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  *   - Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  *
  11  *   - Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  *
  15  *   - Neither the name of Oracle nor the names of its
  16  *     contributors may be used to endorse or promote products derived
  17  *     from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  20  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 
  32 // Find the file with maximum number of lines
  33 
  34 var Files = Java.type("java.nio.file.Files");
  35 var Integer = Java.type("java.lang.Integer");
  36 var Paths = Java.type("java.nio.file.Paths");
  37 
  38 var file = arguments.length == 0? "." : arguments[0];
  39 var ext = arguments.length > 1? arguments[1] : ".java";
  40 var path = Paths.get(file);
  41 
  42 // return number of lines in given Path (that represents a file)
  43 function lines(p) {
  44     var strm = Files.lines(p);
  45     try {
  46         return strm.count();
  47     } finally {
  48         strm.close();
  49     }
  50 }
  51 
  52 // walk files, map to file and lines, find the max    
  53 var obj = Files.find(path, Integer.MAX_VALUE, 
  54     function(p, a) !p.toFile().isDirectory() && p.toString().endsWith(ext)).
  55 map(function(p) ({ path : p, lines: lines(p) })).
  56 max(function(x, y) x.lines - y.lines).get();
  57 
  58 // print path and lines of the max line file
  59 print(obj.path, obj.lines);