1 /*

     2  * Copyright 1997 Sun Microsystems, Inc.  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.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /**/

    25 

    26 

    27 public class LineGenerator {

    28 

    29     IntGenerator ig;

    30     StringGenerator sg;

    31     int limit;

    32 

    33     public LineGenerator(IntGenerator ig, StringGenerator sg, int limit) {

    34         this.ig = ig;

    35         this.sg = sg;

    36         this.limit = limit;

    37     }

    38 

    39     public LineGenerator(IntGenerator ig) {

    40         this.ig = ig;

    41         this.sg = new StringGenerator(ig);

    42         this.limit = -1;

    43     }

    44 

    45     private char prevTerminator = 0;

    46     private int count = 0;

    47     public String lineTerminator;

    48 

    49     public String next() {

    50         if ((count >= limit) && (limit >= 0))

    51             return null;

    52 

    53         String l = sg.next();

    54 

    55         /* Avoid "\r\n" sequences

    56            in which the '\n' terminates a blank line */

    57         int len = l.length();

    58         int t;

    59         do

    60             t = ig.next(2);

    61         while ((prevTerminator == '\r') && (len == 0) && (t == 0));

    62 

    63         String ts;

    64         switch (t) {

    65         case 0:

    66             ts = "\n";

    67             prevTerminator = '\n';

    68             break;

    69         case 1:

    70             ts = "\r";

    71             prevTerminator = '\r';

    72             break;

    73         case 2:

    74         default:

    75             ts = "\r\n";

    76             prevTerminator = '\n';

    77             break;

    78         }

    79 

    80         count++;

    81         lineTerminator = ts;

    82         return l;

    83     }

    84 }