package org.webslinger.commons.vfs;

 import org.apache.commons.vfs.FileContent;

 import org.apache.commons.vfs.FileContentInfo;

 import org.apache.commons.vfs.FileContentInfoFactory;

 import org.apache.commons.vfs.FileSystemException;

 import org.webslinger.util.MimeTypeLookup;

 import org.webslinger.lang.ConcurrentCache;

 public final class MimeTimeFileContentInfoFactory implements FileContentInfoFactory {

     private static final ConcurrentCache<String, FileContentInfo> infos = new ConcurrentCache<String, FileContentInfo>(MimeTimeFileContentInfoFactory.class, "infos", null, ConcurrentCache.SOFT) {

         protected FileContentInfo createValue(final String contentType) {

             return new FileContentInfo() {

                 public String getContentType() {

                     return contentType;

                 }

                 public String getContentEncoding() {

                     return null;

                 }

             };

         }

     };

     private static final FileContentInfo NULL_CONTENT_INFO = new FileContentInfo() {

         public String getContentType() {

             return null;

         }

         public String getContentEncoding() {

             return null;

         }

     };

     private final MimeTypeLookup mimeTypes;

     public MimeTimeFileContentInfoFactory(MimeTypeLookup mimeTypes) {

         this.mimeTypes = mimeTypes;

     }

     public MimeTypeLookup getMimeTypes() {

         return mimeTypes;

     }

     public FileContentInfo create(FileContent fileContent) throws FileSystemException {

         String ext = fileContent.getFile().getName().getExtension();

         if (ext.length() == 0) ext = null;

         return getFileContentInfo(ext);

     }

     protected FileContentInfo getFileContentInfo(String ext) throws FileSystemException {

         try {

             if (ext == null) return NULL_CONTENT_INFO;

             String mimeType = mimeTypes.getMimeType(ext);

             if (mimeType == null) return NULL_CONTENT_INFO;

             return infos.get(mimeType);

         } catch (Exception e) {

             throw VFSUtil.makeFileSystemException(e);

         }

     }

 }