src/java/net/sf/jabref/export/PluginBasedExportFormat.java

   1 package net.sf.jabref.export;
   2
   3 import java.io.*;
   4 import java.net.URL;
   5
   6 import net.sf.jabref.Globals;
   7 import net.sf.jabref.plugin.core.generated._JabRefPlugin.ExportFormatTemplateExtension;
   8
   9 /**
  10  * Class for export formats defined in plugins.
  11  *
  12  * Needed since resources might be loaded from a plugin-jar.
  13  *
  14  */
  15 public class PluginBasedExportFormat extends ExportFormat {
  16
  17         public ExportFormatTemplateExtension extension;
  18
  19         /**
  20          * Load the plugin from the given extension. Might be null if extension
  21          * could not be loaded.
  22          *
  23          * @param extension
  24          * @return
  25          */
  26         public static PluginBasedExportFormat getFormat(
  27                 ExportFormatTemplateExtension extension) {
  28
  29                 String consoleName = extension.getConsoleName();
  30                 String displayName = extension.getDisplayName();
  31                 String layoutFilename = extension.getLayoutFilename();
  32                 String fileExtension = extension.getExtension();
  33
  34                 if ("".equals(fileExtension) || "".equals(displayName)
  35                         || "".equals(consoleName) || "".equals(layoutFilename)) {
  36                         Globals.logger("Could not load extension " + extension.getId());
  37                         return null;
  38                 }
  39
  40                 return new PluginBasedExportFormat(displayName, consoleName,
  41                         layoutFilename, fileExtension, extension);
  42         }
  43
  44         public PluginBasedExportFormat(String displayName, String consoleName,
  45                 String layoutFileName, String fileExtension,
  46                 ExportFormatTemplateExtension extension) {
  47                 super(displayName, consoleName, layoutFileName, null, fileExtension);
  48                 this.extension = extension;
  49         }
  50
  51         @Override
  52         public Reader getReader(String filename) throws IOException {
  53                 URL reso = extension.getDirAsUrl(filename);
  54
  55                 if (reso != null) {
  56                         try {
  57                                 return new InputStreamReader(reso.openStream());
  58                         } catch (FileNotFoundException ex) {
  59                                 // If that didn't work, try below
  60                         }
  61                 }
  62
  63                 try {
  64                         return new FileReader(new File(filename));
  65                 } catch (FileNotFoundException ex) {
  66                         // If that did not work, throw the IOException below
  67                 }
  68                 throw new IOException(Globals.lang("Could not find layout file")
  69                         + ": '" + filename + "'.");
  70         }
  71 }