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1 package com.icl.saxon.style;
2 import com.icl.saxon.tree.AttributeCollection;
3 import com.icl.saxon.*;
4 import com.icl.saxon.expr.*;
5 import com.icl.saxon.om.Namespace;
6 import javax.xml.transform.*;
7
8 import com.icl.saxon.om.NamespaceException;
9 import java.util.StringTokenizer  ;
10 import java.net.URL ;
11 import java.net.URLClassLoader ;
12 import java.net.MalformedURLException ;
13
14
17
18 public class XSLScript extends StyleElement {
19
20 private Class javaClass = null;
21 private String implementsURI = null;
22 private String language = null;
23
24 public void prepareAttributes() throws TransformerConfigurationException {
25
26 String languageAtt = null;
27 String implementsAtt = null;
28 String srcAtt = null;
29 String archiveAtt = null;
30
31 StandardNames sn = getStandardNames();
32 AttributeCollection atts = getAttributeList();
33
34 for (int a=0; a<atts.getLength(); a++) {
35 int nc = atts.getNameCode(a);
36 int f = nc & 0xfffff;
37 if (f==sn.LANGUAGE) {
38 languageAtt = atts.getValue(a);
39 } else if (f==sn.IMPLEMENTS_PREFIX) {
40 implementsAtt = atts.getValue(a);
41 } else if (f==sn.SRC) {
42 srcAtt = atts.getValue(a);
43 } else if (f==sn.ARCHIVE) {
44 archiveAtt = atts.getValue(a);
45 } else {
46 checkUnknownAttribute(nc);
47 }
48 }
49 if (implementsAtt==null) {
50 reportAbsence("implements-prefix");
51 return;
52 } else {
53 try {
54 short uriCode = getURICodeForPrefix(implementsAtt);
55 implementsURI = getNamePool().getURIFromURICode(uriCode);
56 } catch (NamespaceException err) {
57 compileError(err.getMessage());
58 }
59 }
60
61 if (languageAtt==null) {
62 reportAbsence("language");
63 return;
64 } else {
65 language = languageAtt;
66 }
67
68
70 if (language.equals("java")) {
71 if (srcAtt==null) {
72 compileError("For java, the src attribute is mandatory");
73 return;
74 }
75 if (!srcAtt.startsWith("java:")) {
76 compileError("The src attribute must be a URI of the form java:full.class.Name");
77 return;
78 }
79 String className = srcAtt.substring(5);
80
81 if (archiveAtt==null) {
82 try {
83 javaClass = Loader.getClass(className);
84 } catch (TransformerException err) {
85 compileError(err);
86 return;
87 }
88 } else {
89 URL base;
90 try {
91 base = new URL (getBaseURI());
92 } catch (MalformedURLException err) {
93 compileError("Invalid base URI " + getBaseURI());
94 return;
95 }
96 StringTokenizer st = new StringTokenizer (archiveAtt);
97 int count = 0;
98 while (st.hasMoreTokens()) {
99 count++;
100 st.nextToken();
101 }
102 URL [] urls = new URL [count];
103 count = 0;
104 st = new StringTokenizer (archiveAtt);
105 while (st.hasMoreTokens()) {
106 String s = (String )st.nextToken();
107 try {
108 urls[count++] = new URL (base, s);
109 } catch (MalformedURLException err) {
110 compileError("Invalid URL " + s);
111 return;
112 }
113 }
114 try {
115 javaClass = new URLClassLoader (urls).loadClass(className);
116 } catch (java.lang.ClassNotFoundException err) {
117 compileError("Cannot find class " + className + " in the specified archive"
118 + (count>1 ? "s" : ""));
119 } catch (java.lang.NoClassDefFoundError err2) {
120 compileError("Cannot use the archive attribute with this Java VM");
121 }
122 }
123 }
124 }
125
126 public void validate() throws TransformerConfigurationException {
127 if (getURI().equals(Namespace.XSLT)) {
128 if (!forwardsCompatibleModeIsEnabled()) {
130 compileError("To use xsl:script, set xsl:stylesheet version='1.1'");
131 }
132 }
133 checkTopLevel();
134 }
135
136 public void preprocess() throws TransformerConfigurationException {}
137
138 public void process(Context c) {}
139
140
144
145 public Class getJavaClass(String uri) throws TransformerException {
146 if (language==null) {
147 prepareAttributes();
149 }
150 if (language.equals("java") && implementsURI.equals(uri)) {
151 return javaClass;
152 } else {
153 return null;
154 }
155 }
156
157 }
158
159 |
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