2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
31 package mir.generator.tal;
34 import java.io.IOException;
35 import java.io.InputStream;
37 import java.util.HashMap;
39 import mir.generator.tal.interfaces.TALExpressionParser;
40 import mir.generator.tal.template.TALTemplate;
41 import mir.generator.tal.template.TALTemplateNodeLibrary;
42 import mir.generator.tal.template.TALBasicTemplateNodeLibrary;
44 public class TALTemplateEngine {
45 private TALExpressionParser expressionParser;
46 private String basePath;
47 private CachingFileLoader loader;
49 private Map urlToLibrary;
50 private Map prefixToLibrary;
52 public TALTemplateEngine(TALExpressionParser anExpressionParser, String aBasePath) {
53 expressionParser = anExpressionParser;
55 loader = new CachingFileLoader(100, new TemplateFactory());
57 urlToLibrary = new HashMap();
58 prefixToLibrary = new HashMap();
60 registerTemplateNodeLibrary("tal", "http://xml.zope.org/namespaces/tal", new TALBasicTemplateNodeLibrary("tal", "http://xml.zope.org/namespaces/tal"));
61 registerTemplateNodeLibrary("metal", "http://xml.zope.org/namespaces/metal",
62 new TALBasicTemplateNodeLibrary("metal", "http://xml.zope.org/namespaces/metal"));
66 public void registerTemplateNodeLibrary(String aPrefix, String aUrl, TALTemplateNodeLibrary aLibrary) {
67 urlToLibrary.put(aUrl, aLibrary);
68 prefixToLibrary.put(aPrefix, aLibrary);
71 public TALTemplate loadTemplate(String aName) throws IOException {
72 File location = new File(basePath, aName);
73 return (TALTemplate) loader.retrieveFile(location.getCanonicalPath());
76 public TALTemplateNodeLibrary getLibraryForPrefix(String aPrefix) {
77 return (TALTemplateNodeLibrary) prefixToLibrary.get(aPrefix);
80 public TALTemplateNodeLibrary getLibraryForUrl(String aUrl) {
81 return (TALTemplateNodeLibrary) urlToLibrary.get(aUrl);
84 private class TemplateFactory implements CachingFileLoader.CachedFileObjectFactory {
85 public Object constructObject(InputStream aStream) {
87 TALTemplateParser parser = new TALTemplateParser(TALTemplateEngine.this);
89 return parser .parse(aStream, expressionParser);
92 throw new TALFailure(t);