org.argeo.slc.support/src/org/argeo/slc/vfs/VfsResource.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   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 package org.argeo.slc.vfs;
  17
  18 import java.io.File;
  19 import java.io.IOException;
  20 import java.io.InputStream;
  21 import java.net.URI;
  22 import java.net.URISyntaxException;
  23 import java.net.URL;
  24
  25 import org.apache.commons.io.IOExceptionWithCause;
  26 import org.apache.commons.vfs2.FileObject;
  27 import org.apache.commons.vfs2.FileSystemException;
  28 import org.apache.commons.vfs2.NameScope;
  29 import org.argeo.slc.SlcException;
  30 import org.springframework.core.io.Resource;
  31
  32 public class VfsResource implements Resource {
  33         private FileObject fileObject;
  34
  35         public VfsResource(FileObject fileObject) {
  36                 this.fileObject = fileObject;
  37         }
  38
  39         public Resource createRelative(String relativePath) throws IOException {
  40                 return new VfsResource(fileObject.resolveFile(relativePath,
  41                                 NameScope.DESCENDENT_OR_SELF));
  42         }
  43
  44         public boolean exists() {
  45                 try {
  46                         return fileObject.exists();
  47                 } catch (FileSystemException e) {
  48                         throw new SlcException("Cannot find out whether " + fileObject
  49                                         + " exists", e);
  50                 }
  51         }
  52
  53         public String getDescription() {
  54                 return "VFS resource " + fileObject;
  55         }
  56
  57         public File getFile() throws IOException {
  58                 throw new IOException("Cannot access " + getDescription()
  59                                 + " as a local file");
  60                 // TODO: access local files
  61                 // if(fileObject instanceof LocalFile){
  62                 // ((LocalFile)fileObject).
  63                 // }
  64                 // return null;
  65         }
  66
  67         public String getFilename() {
  68                 return fileObject.getName().getBaseName();
  69         }
  70
  71         public URI getURI() throws IOException {
  72                 try {
  73                         return new URI(fileObject.getName().getURI());
  74                 } catch (URISyntaxException e) {
  75                         throw new IOExceptionWithCause(e);
  76                 }
  77         }
  78
  79         public URL getURL() throws IOException {
  80                 return fileObject.getURL();
  81         }
  82
  83         public boolean isOpen() {
  84                 return fileObject.isContentOpen();
  85         }
  86
  87         public boolean isReadable() {
  88                 try {
  89                         return fileObject.isReadable();
  90                 } catch (FileSystemException e) {
  91                         throw new SlcException("Cannot find out whether " + fileObject
  92                                         + " is readable", e);
  93                 }
  94         }
  95
  96         public long lastModified() throws IOException {
  97                 return fileObject.getContent().getLastModifiedTime();
  98         }
  99
 100         public InputStream getInputStream() throws IOException {
 101                 return fileObject.getContent().getInputStream();
 102         }
 103
 104         public FileObject getFileObject() {
 105                 return fileObject;
 106         }
 107
 108         public long contentLength(){
 109                 return -1;
 110         }
 111 }