1+ /*
2+ * eXist-db Open Source Native XML Database
3+ * Copyright (C) 2001 The eXist-db Authors
4+ *
5+ 6+ * http://www.exist-db.org
7+ *
8+ * This library is free software; you can redistribute it and/or
9+ * modify it under the terms of the GNU Lesser General Public
10+ * License as published by the Free Software Foundation; either
11+ * version 2.1 of the License, or (at your option) any later version.
12+ *
13+ * This library is distributed in the hope that it will be useful,
14+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
15+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16+ * Lesser General Public License for more details.
17+ *
18+ * You should have received a copy of the GNU Lesser General Public
19+ * License along with this library; if not, write to the Free Software
20+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21+ */
22+
23+ package org .exist .xquery .functions .fn .transform ;
24+
25+ import org .exist .dom .persistent .NodeProxy ;
26+ import org .exist .security .PermissionDeniedException ;
27+ import org .exist .xmldb .XmldbURI ;
28+ import org .exist .xquery .ErrorCodes ;
29+ import org .exist .xquery .Expression ;
30+ import org .exist .xquery .XPathException ;
31+ import org .exist .xquery .XQueryContext ;
32+ import org .exist .xquery .util .DocUtils ;
33+ import org .exist .xquery .value .AnyURIValue ;
34+ import org .exist .xquery .value .Sequence ;
35+ import org .exist .xquery .value .Type ;
36+ import org .w3c .dom .Node ;
37+
38+ import javax .xml .transform .Source ;
39+ import javax .xml .transform .TransformerException ;
40+ import javax .xml .transform .URIResolver ;
41+ import javax .xml .transform .dom .DOMSource ;
42+ import java .net .URI ;
43+ import java .net .URISyntaxException ;
44+
45+ public class URIResolution {
46+
47+ /**
48+ * URI resolution, the core should be the same as for fn:resolve-uri
49+ * @param relative URI to resolve
50+ * @param base to resolve against
51+ * @return resolved URI
52+ * @throws URISyntaxException if resolution is not possible
53+ */
54+ static AnyURIValue resolveURI (final AnyURIValue relative , final AnyURIValue base ) throws URISyntaxException {
55+ var relativeURI = new URI (relative .getStringValue ());
56+ if (relativeURI .isAbsolute ()) {
57+ return relative ;
58+ }
59+ var baseURI = new URI (base .getStringValue () );
60+ try {
61+ var xBase = XmldbURI .xmldbUriFor (baseURI );
62+ var resolved = xBase .getURI ().resolve (relativeURI );
63+ return new AnyURIValue (XmldbURI .XMLDB_URI_PREFIX + resolved );
64+ } catch (URISyntaxException e ) {
65+ return new AnyURIValue (baseURI .resolve (relativeURI ));
66+ } catch (XPathException e ) {
67+ throw new RuntimeException (e );
68+ }
69+ }
70+
71+ static public class CompileTimeURIResolver implements URIResolver {
72+
73+ private final XQueryContext xQueryContext ;
74+ private final Expression containingExpression ;
75+
76+ public CompileTimeURIResolver (XQueryContext xQueryContext , Expression containingExpression ) {
77+ this .xQueryContext = xQueryContext ;
78+ this .containingExpression = containingExpression ;
79+ }
80+
81+ @ Override
82+ public Source resolve (final String href , final String base ) throws TransformerException {
83+
84+ try {
85+ final AnyURIValue baseURI = new AnyURIValue (base );
86+ final AnyURIValue hrefURI = new AnyURIValue (href );
87+ var resolved = resolveURI (hrefURI , baseURI );
88+ return resolveDocument (resolved .getStringValue (), xQueryContext , containingExpression );
89+ } catch (URISyntaxException e ) {
90+ throw new TransformerException ("Failed to resolve " +
91+ href +
92+ " against " +
93+ base , e );
94+ } catch (org .exist .xquery .XPathException e ) {
95+ throw new TransformerException ("Failed to find document as result of resolving " +
96+ href +
97+ " against " +
98+ base , e );
99+ }
100+ }
101+ }
102+
103+ /**
104+ * Resolve an absolute document location, stylesheet or included source
105+ *
106+ * @param location of the stylesheet
107+ * @return the resolved stylesheet as a source
108+ * @throws org.exist.xquery.XPathException if the item does not exist, or is not a document
109+ */
110+ static Source resolveDocument (final String location , final XQueryContext xQueryContext , Expression containingExpression ) throws org .exist .xquery .XPathException {
111+
112+ final Sequence document ;
113+ try {
114+ document = DocUtils .getDocument (xQueryContext , location );
115+ } catch (final PermissionDeniedException e ) {
116+ throw new org .exist .xquery .XPathException (containingExpression , ErrorCodes .FODC0002 ,
117+ "Can not access '" + location + "'" + e .getMessage ());
118+ }
119+ if (document == null || document .isEmpty ()) {
120+ throw new org .exist .xquery .XPathException (containingExpression , ErrorCodes .FODC0002 ,
121+ "No document found at location '" + location );
122+ }
123+ if (document .hasOne () && Type .subTypeOf (document .getItemType (), Type .NODE )) {
124+ if (document instanceof NodeProxy proxy ) {
125+ return new DOMSource (proxy .getNode ());
126+ }
127+ else if (document .itemAt (0 ) instanceof Node node ) {
128+ return new DOMSource (node );
129+ }
130+ }
131+ throw new org .exist .xquery .XPathException (containingExpression , ErrorCodes .FODC0002 ,
132+ "Location '" + location + "' returns an item which is not a document node" );
133+ }
134+ }
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