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1 package com.genimen.djeneric.web.util;
2
3 import java.io.BufferedWriter  ;
4 import java.io.ByteArrayOutputStream ;
5 import java.io.FileOutputStream ;
6 import java.io.IOException ;
7 import java.io.OutputStreamWriter ;
8 import java.util.HashMap ;
9
10 import javax.servlet.ServletException ;
11 import javax.xml.transform.OutputKeys ;
12 import javax.xml.transform.Result ;
13 import javax.xml.transform.Source ;
14 import javax.xml.transform.Templates ;
15 import javax.xml.transform.Transformer ;
16 import javax.xml.transform.TransformerConfigurationException ;
17 import javax.xml.transform.TransformerException ;
18 import javax.xml.transform.TransformerFactory ;
19 import javax.xml.transform.TransformerFactoryConfigurationError ;
20 import javax.xml.transform.dom.DOMSource ;
21 import javax.xml.transform.stream.StreamResult ;
22
23 import org.w3c.dom.Document ;
24
25 public class DjenericXSLTransform
26 {
27 private static HashMap _cachedTemplates = new HashMap ();
28 private static boolean _caching = false;
29 private static String _viewDumpLocation = "/temp/dump";
30 private String _templateRoot;
31
32 public DjenericXSLTransform(String templateRoot)
33 {
34 if (!templateRoot.endsWith("/") && !templateRoot.endsWith("\\")) templateRoot += "/";
35 _templateRoot = templateRoot;
36 }
37
38 public String transform(Document doc, String path) throws IOException , ServletException
39 {
40 try
41 {
42 path = _templateRoot + path;
43
44 DOMSource input = new DOMSource (doc);
45
46 Transformer trans = this.createTransformer(path);
47 ByteArrayOutputStream bos = new ByteArrayOutputStream (50000);
48 Result res = new StreamResult (bos);
49
50 trans.transform(input, res);
51
52 String result = bos.toString("UTF-8");
53
54 if (_viewDumpLocation != null)
55 {
56 String fn = _viewDumpLocation;
57 if (!fn.endsWith("/") && !fn.endsWith("\\")) fn += "/";
58
59 String name = path;
60 int idx = path.lastIndexOf("/");
61 if (idx != -1) name = name.substring(idx + 1);
62
63 BufferedWriter w = new BufferedWriter (
64 new OutputStreamWriter (new FileOutputStream (fn + name + ".html"), "UTF-8"));
65 w.write(result);
66 w.close();
67
68 w = new BufferedWriter (new OutputStreamWriter (new FileOutputStream (fn + name + ".xml"), "UTF-8"));
69 w.write(doc2String(doc));
70 w.close();
71 }
72
73 return result;
74 }
75 catch (TransformerException ex)
76 {
77 throw new ServletException (ex);
78 }
79 }
80
81 public static void clearCache()
82 {
83 _cachedTemplates = new HashMap ();
84 }
85
86 private String doc2String(Document doc) throws TransformerConfigurationException ,
87 TransformerFactoryConfigurationError , TransformerException
88 {
89 ByteArrayOutputStream baos = new ByteArrayOutputStream ();
90
91 Transformer serializer = TransformerFactory.newInstance().newTransformer();
92 serializer.setOutputProperty(OutputKeys.INDENT, "yes");
94 serializer.transform(new DOMSource (doc), new StreamResult (baos));
95 return baos.toString();
96 }
97
98 private Transformer createTransformer(String path) throws TransformerException
99 {
100 Templates result = (Templates ) _cachedTemplates.get(path);
101 if (result == null || !_caching)
102 {
103 TransformerFactory tFactory = DjenericTransformerFactory.newInstance();
104
105 Source src = tFactory.getURIResolver().resolve(path, "");
106
107 result = tFactory.newTemplates(src);
108 _cachedTemplates.put(path, result);
109 }
110 return result.newTransformer();
111 }
112
113 public static void setViewDumpLocation(String viewDumpLocation)
114 {
115 _viewDumpLocation = viewDumpLocation;
116 }
117
118 public static void setXSLCaching(boolean caching)
119 {
120 _caching = caching;
121 }
122 } |
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