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.vfs.VFile;
24 import org.millscript.millscript.alert.Alerts;
25
26 import java.io.IOException;
27
28 /**
29 * This class implements the MillScript line loader. The contents of the file
30 * are read and the first line is then bound, as a string, to the symbol
31 * registered with this loader.
32 */
33 public final class SingleLineLoader extends AbsTextLoader {
34
35 /**
36 * @see org.millscript.millscript.loaders.Loader#loadValue()
37 */
38 @Override
39 public Object loadValue() throws IOException {
40 if ( this.entry instanceof VFile && this.entry.exists() ) {
41 String text = readAll( ((VFile) entry).getReader() );
42
43 String sep = System.getProperty( "line.separator" );
44 int n = text.indexOf( sep );
45 if ( n >= 0 ) {
46 text = text.substring( 0, n );
47 }
48
49 return text;
50 } else {
51 throw(
52 Alerts.compile(
53 "Inventory entry is not a file",
54 "Single line loader can only be used to load files"
55 ).culprit( "entry", this.entry ).mishap()
56 );
57 }
58 }
59
60 }