org.argeo.cms.ui/src/org/argeo/cms/util/StyleSheetResourceLoader.java

   1 package org.argeo.cms.util;
   2
   3 import java.io.ByteArrayInputStream;
   4 import java.io.ByteArrayOutputStream;
   5 import java.io.IOException;
   6 import java.io.InputStream;
   7 import java.net.URL;
   8 import java.util.LinkedHashMap;
   9 import java.util.Map;
  10
  11 import org.apache.commons.io.IOUtils;
  12 import org.argeo.cms.CmsException;
  13 import org.eclipse.rap.rwt.service.ResourceLoader;
  14 import org.osgi.framework.Bundle;
  15
  16 /** {@link ResourceLoader} caching stylesheets. */
  17 public class StyleSheetResourceLoader implements ResourceLoader {
  18         private Bundle themeBundle;
  19         private Map<String, StyleSheet> stylesheets = new LinkedHashMap<String, StyleSheet>();
  20
  21         public StyleSheetResourceLoader(Bundle themeBundle) {
  22                 this.themeBundle = themeBundle;
  23         }
  24
  25         @Override
  26         public InputStream getResourceAsStream(String resourceName) throws IOException {
  27                 if (!stylesheets.containsKey(resourceName)) {
  28                         // TODO deal with other bundles
  29                         // Bundle bundle = bundleContext.getBundle();
  30                         // String location =
  31                         // bundle.getLocation().substring("initial@reference:".length());
  32                         // if (location.startsWith("file:")) {
  33                         // Path path = null;
  34                         // try {
  35                         // path = Paths.get(new URI(location));
  36                         // } catch (URISyntaxException e) {
  37                         // e.printStackTrace();
  38                         // }
  39                         // if (path != null) {
  40                         // Path resourcePath = path.resolve(resourceName);
  41                         // if (Files.exists(resourcePath))
  42                         // return Files.newInputStream(resourcePath);
  43                         // }
  44                         // }
  45
  46                         URL res = themeBundle.getEntry(resourceName);
  47                         if (res == null)
  48                                 throw new CmsException(
  49                                                 "Entry " + resourceName + " not found in bundle " + themeBundle.getSymbolicName());
  50                         ByteArrayOutputStream out = new ByteArrayOutputStream();
  51                         IOUtils.copy(res.openStream(), out);
  52                         stylesheets.put(resourceName, new StyleSheet(out.toByteArray()));
  53                 }
  54                 return new ByteArrayInputStream(stylesheets.get(resourceName).getData());
  55                 // return res.openStream();
  56         }
  57
  58         private class StyleSheet {
  59                 private byte[] data;
  60
  61                 public StyleSheet(byte[] data) {
  62                         super();
  63                         this.data = data;
  64                 }
  65
  66                 public byte[] getData() {
  67                         return data;
  68                 }
  69
  70         }
  71 }