1 ////////////////////////////////////////////////////////////////////////////////
2 // MillScript: an Open Spice interpreter and batch website creation tool
3 // Copyright (C) 2001-2004 Open World Ltd
4 //
5 // This file is part of MillScript.
6 //
7 // MillScript is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU General Public License as published by the Free
9 // Software Foundation; either version 2 of the License, or (at your option)
10 // any later version.
11 //
12 // MillScript is distributed in the hope that it will be useful, but WITHOUT
13 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 // more details.
16 //
17 // You should have received a copy of the GNU General Public License along with
18 // MillScript; if not, write to the Free Software Foundation, Inc., 59 Temple
19 // Place, Suite 330, Boston, MA 02111-1307 USA
20 ////////////////////////////////////////////////////////////////////////////////
21 package org.millscript.millscript.loaders;
22
23 import org.millscript.commons.util.list.ELinkedList;
24 import org.millscript.commons.vfs.VFile;
25 import org.millscript.millscript.alert.Alerts;
26
27 import java.io.IOException;
28
29 /**
30 * This class implements the MillScript lines loader. The contents of the file
31 * are read and split into a list of lines, which is then bound to the symbol
32 * registered with this loader.
33 */
34 public final class LinesLoader extends AbsTextLoader {
35
36 /**
37 * @see org.millscript.millscript.loaders.Loader#loadValue()
38 */
39 @Override
40 public Object loadValue() throws IOException {
41 if ( this.entry instanceof VFile && this.entry.exists() ) {
42 String sep = System.getProperty( "line.separator" );
43 int nsep = sep.length();
44 String text = readAll( ((VFile) entry).getReader() );
45 ELinkedList< String > lines = new ELinkedList< String >();
46 int offset = 0;
47 for (;;) {
48 int n = text.indexOf( sep, offset );
49 if ( n < 0 ) {
50 if ( text.length() > offset ) {
51 lines.addLast( text.substring( offset ) );
52 }
53 break;
54 } else {
55 lines.addLast( text.substring( offset, n ) );
56 offset = n + nsep;
57 }
58 }
59 return lines;
60 } else {
61 throw(
62 Alerts.compile(
63 "Inventory entry is not a file",
64 "Lines loader can only be used to load files"
65 ).culprit( "entry", this.entry ).mishap()
66 );
67 }
68 }
69
70 }