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1 package net.sf.saxon.style;
2 import net.sf.saxon.expr.Expression;
3 import net.sf.saxon.functions.ExecutableFunctionLibrary;
4 import net.sf.saxon.instruct.Executable;
5 import net.sf.saxon.om.AttributeCollection;
6 import net.sf.saxon.om.NamePool;
7 import net.sf.saxon.query.StaticQueryContext;
8 import net.sf.saxon.query.XQueryFunction;
9 import net.sf.saxon.query.ModuleURIResolver;
10 import net.sf.saxon.query.QueryReader;
11 import net.sf.saxon.trans.XPathException;
12 import net.sf.saxon.trans.StaticError;
13
14 import javax.xml.transform.stream.StreamSource  ;
15 import java.util.Iterator ;
16
17
18
24
25 public class SaxonImportQuery extends StyleElement {
26
27 private String href;
28 private String moduleURI;
29
30
36
37 public void importModule() throws XPathException {
38 prepareAttributes();
39 loadLibraryModule();
40 }
41
42 public void prepareAttributes() throws XPathException {
43
44 if (href!=null || moduleURI!=null) {
46 return;
47 }
48
49 AttributeCollection atts = getAttributeList();
50
51 for (int a=0; a<atts.getLength(); a++) {
52 int nc = atts.getNameCode(a);
53 String f = getNamePool().getClarkName(nc);
54 if (f==StandardNames.HREF) {
55 href = atts.getValue(a).trim();
56 } else if (f==StandardNames.NAMESPACE) {
57 moduleURI = atts.getValue(a).trim();
58 } else {
59 checkUnknownAttribute(nc);
60 moduleURI=""; }
62 }
63
64 if (href==null && moduleURI==null) {
65 compileError("At least one of href or namespace must be specified");
66 moduleURI=""; }
68 }
69
70 public void validate() throws XPathException {
71 checkEmpty();
72 checkTopLevel(null);
73 }
74
75 private void loadLibraryModule() throws XPathException {
76
77 if (href==null && moduleURI==null) {
78 return;
80 }
81
82 try {
83 XSLStylesheet top = getPrincipalStylesheet();
84 getExecutable().setFunctionLibrary(new ExecutableFunctionLibrary(getConfiguration()));
85 StaticQueryContext importedModule = loadModule();
87
88
90 short ns = importedModule.getModuleNamespaceCode();
91 NamePool pool = getTargetNamePool();
92 Iterator it = importedModule.getFunctionDefinitions();
93 while (it.hasNext()) {
94 XQueryFunction def = (XQueryFunction)it.next();
95 if (pool.getURICode(def.getFunctionFingerprint()) == ns) {
97 top.declareXQueryFunction(def);
98 }
99 }
101 } catch (XPathException err) {
102 compileError(err);
103 }
104 }
105
106
109
110 private StaticQueryContext loadModule() throws XPathException {
111
113 ModuleURIResolver resolver = getConfiguration().getModuleURIResolver();
114 if (resolver == null) {
115 resolver = getConfiguration().getStandardModuleURIResolver();
116 }
117
118 String [] hints = {href};
119 StreamSource [] sources;
120 try {
121 sources = resolver.resolve(moduleURI, getBaseURI(), hints);
122 if (sources == null) {
123 resolver = getConfiguration().getStandardModuleURIResolver();
124 sources = resolver.resolve(moduleURI, getBaseURI(), hints);
125 }
126 } catch (XPathException e) {
127 throw StaticError.makeStaticError(e);
128 }
129
130 if (sources.length != 1) {
131 StaticError err = new StaticError("Query module resolver must return a single module");
132 throw err;
133 }
134
135
136 StreamSource ss = sources[0];
137 String baseURI = ss.getSystemId();
138 if (baseURI == null) {
139 ss.setSystemId(hints[0]);
140 }
141 String queryText = QueryReader.readSourceQuery(ss);
142 StaticQueryContext sqc = StaticQueryContext.makeStaticQueryContext(
143 baseURI, getExecutable(), null, queryText, moduleURI);
144 getExecutable().fixupQueryModules(sqc);
145 return sqc;
146
147
148 }
149
150
151 public Expression compile(Executable exec) throws XPathException {
152 exec.setReasonUnableToCompile("Cannot compile a stylesheet that imports an XQuery library module");
153 return null;
154 }
155 }
156
157 |
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