bundles/org.simantics.scl.osgi/src/org/simantics/scl/osgi/internal/BundleDocumentationSource.java

   1 package org.simantics.scl.osgi.internal;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.net.URL;
   6 import java.nio.charset.Charset;
   7 import java.util.Arrays;
   8
   9 import org.osgi.framework.Bundle;
  10 import org.slf4j.Logger;
  11 import org.slf4j.LoggerFactory;
  12
  13 public class BundleDocumentationSource {
  14
  15     private static final Logger LOGGER = LoggerFactory.getLogger(BundleDocumentationSource.class);
  16
  17     public static final Charset UTF8 = Charset.forName("UTF-8");
  18
  19     public final String documentationName;
  20     public final Bundle bundle;
  21     public final URL url;
  22
  23     public BundleDocumentationSource(String documentationName, Bundle bundle,
  24             URL url) {
  25         this.documentationName = documentationName;
  26         this.bundle = bundle;
  27         this.url = url;
  28     }
  29
  30     public String getText() {
  31         try {
  32             InputStream stream = url.openStream();
  33             try {
  34                 byte[] buffer = new byte[1024];
  35                 int pos = 0;
  36                 while(true) {
  37                     int count = stream.read(buffer, pos, buffer.length-pos);
  38                     if(count <= 0)
  39                         break;
  40                     pos += count;
  41                     if(pos == buffer.length)
  42                         buffer = Arrays.copyOf(buffer, buffer.length*2);
  43                 }
  44                 return new String(buffer, 0, pos, UTF8);
  45             } finally {
  46                 stream.close();
  47             }
  48         } catch(IOException e) {
  49             LOGGER.error("Could not get text for {} at {}", documentationName, url);
  50             return null;
  51         }
  52     }
  53 }