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1 package com.tirsen.nanning.xml;
2
3 import com.tirsen.nanning.AspectException;
4 import com.tirsen.nanning.config.AspectSystem;
5 import org.apache.commons.digester.xmlrules.DigesterLoader;
6 import org.apache.commons.digester.xmlrules.DigesterLoadingException;
7 import org.xml.sax.SAXException  ;
8
9 import java.io.IOException ;
10 import java.io.InputStream ;
11 import java.io.ByteArrayInputStream ;
12 import java.net.URL ;
13
14 public class AspectSystemParser {
15 private static final String RULES_RESOURCE = "com/tirsen/nanning/xml/rules.xml";
16
17 public AspectSystem parse(InputStream input) throws IOException {
18 ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
19 ClassLoader classLoader = getClass().getClassLoader();
20 URL rules = null;
21 if (contextClassLoader != null) {
22 rules = contextClassLoader.getResource(RULES_RESOURCE);
23 }
24 if (rules == null) {
25 rules = classLoader.getResource(RULES_RESOURCE);
26 }
27 assert rules != null : "could not find rules in class-loader " + classLoader;
28 try {
29 return (AspectSystem) DigesterLoader.load(rules,
30 contextClassLoader != null ? contextClassLoader : classLoader, input);
31 } catch (SAXException e) {
32 throw new AspectException(e);
33 } catch (DigesterLoadingException e) {
34 throw new AspectException(e);
35 }
36 }
37
38 public AspectSystem parse(String xmlAsString) throws IOException {
39 return parse(new ByteArrayInputStream (xmlAsString.getBytes()));
40 }
41
42 public AspectSystem parse(URL resource) throws IOException {
43 InputStream input = resource.openStream();
44 try {
45 return parse(input);
46 } finally {
47 input.close();
48 }
49 }
50 }
51 |
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