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1
21 package com.jaspersoft.jasperserver.api.engine.jasperreports.util;
22
23 import java.io.IOException  ;
24 import java.net.MalformedURLException ;
25 import java.net.URL ;
26 import java.net.URLConnection ;
27 import java.net.URLStreamHandler ;
28
29 import org.apache.commons.collections.ReferenceMap;
30
31 import com.jaspersoft.jasperserver.api.JSException;
32 import com.jaspersoft.jasperserver.api.JSExceptionWrapper;
33
34
38 public class JarURLStreamHandler extends URLStreamHandler {
39
40 private static final String PROTOCOL = "jsjar";
41 private static final String URL_PREFIX = PROTOCOL + ":";
42 private static final int URL_PREFIX_LENGHT = URL_PREFIX.length();
43 private static final String SEPARATOR = "!";
44 private static final int SEPARATOR_LENGHT = SEPARATOR.length();
45
46 private final ReferenceMap urlStreams;
47
48 protected void parseURL(URL u, String spec, int start, int limit) {
49 if (!spec.startsWith(URL_PREFIX)) {
50 throw new JSException("Malformed jar URL \"" + spec + "\"");
51 }
52 int sep = spec.indexOf(SEPARATOR);
53 if (sep < 0) {
54 throw new JSException("Malformed jar URL \"" + spec + "\"");
55 }
56 String jar = spec.substring(URL_PREFIX_LENGHT, sep);
57 String res = spec.substring(sep + SEPARATOR_LENGHT, spec.length());
58 setURL(u, PROTOCOL, null, -1, null, null, jar, null, res);
59 }
60
61 public JarURLStreamHandler() {
62 urlStreams = new ReferenceMap(ReferenceMap.WEAK, ReferenceMap.HARD);
63 }
64
65 protected URLConnection openConnection(URL u) throws IOException {
66 JarFileEntry entry = getURLEntry(u);
67 if (entry == null) {
68 throw new JSException("Jar entry not found for URL " + u);
69 }
70 return new JarConnection(u, entry);
71 }
72
73 public URL createURL(JarFileEntry jarEntry) {
74 try {
75 String spec = URL_PREFIX + jarEntry.getJarFile().getName()
76 + SEPARATOR + jarEntry.getEntry().getName();
77 URL url = new URL (null, spec, this);
78 putURL(url, jarEntry);
79 return url;
80 } catch (MalformedURLException e) {
81 throw new JSExceptionWrapper(e);
82 }
83 }
84
85 public synchronized void putURL(URL u, JarFileEntry jarEntry) {
86 urlStreams.put(u, jarEntry);
87 }
88
89 protected synchronized JarFileEntry getURLEntry(URL u) {
90 return (JarFileEntry) urlStreams.get(u);
91 }
92
93 protected boolean equals(URL u1, URL u2) {
94 return u1 == u2;
95 }
96
97 protected int hashCode(URL u) {
98 return System.identityHashCode(u);
99 }
100
101 protected String toExternalForm(URL u) {
102 return URL_PREFIX + u.getPath() + SEPARATOR + u.getRef();
103 }
104 }
105 |
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