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1
36 package org.ungoverned.moduleloader;
37
38 import java.io.ByteArrayOutputStream  ;
39 import java.io.InputStream ;
40
41
50 public class SystemResourceSource implements ResourceSource
51 {
52 private static final int BUFSIZE = 4096;
53 private boolean m_opened = false;
54
55 public void open()
56 {
57 m_opened = true;
58 }
59
60 public void close()
61 {
62 m_opened = false;
63 }
64
65 public boolean hasResource(String name) throws IllegalStateException
66 {
67 if (!m_opened)
68 {
69 throw new IllegalStateException ("SystemResourceSource is not open");
70 }
71 return (ClassLoader.getSystemClassLoader().getResource(name) != null);
72 }
73
74 public byte[] getBytes(String name) throws IllegalStateException
75 {
76 if (!m_opened)
77 {
78 throw new IllegalStateException ("SystemResourceSource is not open");
79 }
80 InputStream is = null;
81 ByteArrayOutputStream baos = null;
82
83 try {
84 ClassLoader loader = ClassLoader.getSystemClassLoader();
85 is = loader.getResourceAsStream(name);
86 if (is == null)
87 {
88 return null;
89 }
90 baos = new ByteArrayOutputStream (BUFSIZE);
91 byte[] buf = new byte[BUFSIZE];
92 int n = 0;
93 while ((n = is.read(buf, 0, buf.length)) >= 0)
94 {
95 baos.write(buf, 0, n);
96 }
97 return baos.toByteArray();
98 } catch (Exception ex) {
99 return null;
100 } finally {
101 try {
102 if (baos != null) baos.close();
103 } catch (Exception ex) {
104 }
105 try {
106 if (is != null) is.close();
107 } catch (Exception ex) {
108 }
109 }
110 }
111 } |
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