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1
23
24 package org.hammurapi;
25
26 import java.io.File  ;
27 import java.io.FileInputStream ;
28 import java.io.FileNotFoundException ;
29 import java.io.IOException ;
30 import java.io.InputStream ;
31 import java.net.MalformedURLException ;
32 import java.net.URL ;
33 import java.util.Date ;
34
35 import javax.xml.parsers.DocumentBuilderFactory ;
36 import javax.xml.parsers.ParserConfigurationException ;
37 import javax.xml.transform.TransformerException ;
38
39 import org.apache.xpath.XPathAPI;
40 import org.w3c.dom.Document ;
41 import org.w3c.dom.Element ;
42 import org.w3c.dom.traversal.NodeIterator;
43 import org.xml.sax.SAXException ;
44
45
50 public class DomWaiverSource implements WaiverSource {
51 private Element holder;
52
53 public DomWaiverSource(Element holder) {
54 this.holder=holder;
55 }
56
57 public DomWaiverSource(InputStream in) throws HammurapiException {
58 load(in);
59 }
60
61 public DomWaiverSource(File f) throws HammurapiException {
62 try {
63 load(new FileInputStream (f));
64 } catch (FileNotFoundException e) {
65 throw new HammurapiException("File not found: "+f.getAbsolutePath(), e);
66 }
67 }
68
69 private void load(InputStream in) throws HammurapiException {
70 try {
71 Document document=DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(in);
72 holder=document.getDocumentElement();
73 } catch (ParserConfigurationException e) {
74 throw new HammurapiException(e.toString(), e);
75 } catch (SAXException e) {
76 throw new HammurapiException(e.toString(), e);
77 } catch (IOException e) {
78 throw new HammurapiException(e.toString(), e);
79 }
80 }
81
82 public void loadWaivers(WaiverSet waiverSet, Date now) throws HammurapiException {
83 if (holder.hasAttribute("base")) {
84 try {
85 URL baseURL=new URL (holder.getAttribute("base"));
86 DomWaiverSource base=new DomWaiverSource(baseURL.openStream());
87 base.loadWaivers(waiverSet, now);
88 } catch (MalformedURLException e) {
89 throw new HammurapiException("Malformed base URL: "+e, e);
90 } catch (IOException e) {
91 throw new HammurapiException(e.toString(), e);
92 }
93 }
94
95 try {
96 NodeIterator waiverIterator=XPathAPI.selectNodeIterator(holder, "waiver");
97 Element waiverElement;
98 while ((waiverElement=(Element ) waiverIterator.nextNode())!=null) {
99 waiverSet.addWaiver(new DomWaiver(waiverElement), now);
100 }
101 } catch (TransformerException e) {
102 new HammurapiException(e);
103 }
104 }
105 }
106 |
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