runtime/org.argeo.slc.support.simple/src/main/java/org/argeo/slc/vfs/VfsResource.java

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.argeo.slc.vfs;
  18
  19 import java.io.File;
  20 import java.io.IOException;
  21 import java.io.InputStream;
  22 import java.net.URI;
  23 import java.net.URISyntaxException;
  24 import java.net.URL;
  25
  26 import org.apache.commons.io.IOExceptionWithCause;
  27 import org.apache.commons.vfs.FileObject;
  28 import org.apache.commons.vfs.FileSystemException;
  29 import org.apache.commons.vfs.NameScope;
  30 import org.argeo.slc.SlcException;
  31 import org.springframework.core.io.Resource;
  32
  33 public class VfsResource implements Resource {
  34         private FileObject fileObject;
  35
  36         public VfsResource(FileObject fileObject) {
  37                 this.fileObject = fileObject;
  38         }
  39
  40         public Resource createRelative(String relativePath) throws IOException {
  41                 return new VfsResource(fileObject.resolveFile(relativePath,
  42                                 NameScope.DESCENDENT_OR_SELF));
  43         }
  44
  45         public boolean exists() {
  46                 try {
  47                         return fileObject.exists();
  48                 } catch (FileSystemException e) {
  49                         throw new SlcException("Cannot find out whether " + fileObject
  50                                         + " exists", e);
  51                 }
  52         }
  53
  54         public String getDescription() {
  55                 return "VFS resource " + fileObject;
  56         }
  57
  58         public File getFile() throws IOException {
  59                 throw new IOException("Cannot access " + getDescription()
  60                                 + " as a local file");
  61                 // TODO: access local files
  62                 // if(fileObject instanceof LocalFile){
  63                 // ((LocalFile)fileObject).
  64                 // }
  65                 // return null;
  66         }
  67
  68         public String getFilename() {
  69                 return fileObject.getName().getBaseName();
  70         }
  71
  72         public URI getURI() throws IOException {
  73                 try {
  74                         return new URI(fileObject.getName().getURI());
  75                 } catch (URISyntaxException e) {
  76                         throw new IOExceptionWithCause(e);
  77                 }
  78         }
  79
  80         public URL getURL() throws IOException {
  81                 return fileObject.getURL();
  82         }
  83
  84         public boolean isOpen() {
  85                 return fileObject.isContentOpen();
  86         }
  87
  88         public boolean isReadable() {
  89                 try {
  90                         return fileObject.isReadable();
  91                 } catch (FileSystemException e) {
  92                         throw new SlcException("Cannot find out whether " + fileObject
  93                                         + " is readable", e);
  94                 }
  95         }
  96
  97         public long lastModified() throws IOException {
  98                 return fileObject.getContent().getLastModifiedTime();
  99         }
 100
 101         public InputStream getInputStream() throws IOException {
 102                 return fileObject.getContent().getInputStream();
 103         }
 104
 105         public FileObject getFileObject() {
 106                 return fileObject;
 107         }
 108
 109 }