java.fedora.server.storage.lowlevel.FileSystem Maven / Gradle / Ivy
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/*
* -----------------------------------------------------------------------------
*
* License and Copyright: The contents of this file are subject to the
* Apache License, Version 2.0 (the "License"); you may not use
* this file except in compliance with the License. You may obtain a copy of
* the License at
* http://www.fedora-commons.org/licenses.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
* the specific language governing rights and limitations under the License.
*
* The entire file consists of original code.
* Copyright © 2008 Fedora Commons, Inc.
*
Copyright © 2002-2007 The Rector and Visitors of the University of
* Virginia and Cornell University
* All rights reserved.
*
* -----------------------------------------------------------------------------
*/
package fedora.server.storage.lowlevel;
import java.io.File;
import java.io.InputStream;
import java.util.Map;
import fedora.server.errors.LowlevelStorageException;
/**
*
* Title: IFileSystem.java
* Description:
*
* @author [email protected]
* @version $Id$
*/
public abstract class FileSystem {
public FileSystem(Map configuration) {}
public abstract InputStream read(File file) throws LowlevelStorageException;
public abstract void write(File file, InputStream content) throws LowlevelStorageException;
public abstract void rewrite(File file, InputStream content) throws LowlevelStorageException;
public abstract void delete(File file) throws LowlevelStorageException;
/**
* THIS IS ONLY FOR TESTING. Use of this method on a production system
* may cause irreparable data loss. YOU HAVE BEEN WARNED.
*
* @param directory
* @return true if the delete was successful
*/
public boolean deleteDirectory(String directory) {
boolean result = false;
if (directory != null) {
File file = new File(directory);
if (file.exists() && file.isDirectory()) {
// 1. delete content of directory:
File[] files = file.listFiles();
result = true; //init result flag
int count = files.length;
for (int i = 0; i < count; i++) { //for each file:
File f = files[i];
if (f.isFile()) {
result = result && f.delete();
} else if (f.isDirectory()) {
result = result && deleteDirectory(f.getAbsolutePath());
}
}//next file
file.delete(); //finally delete (empty) input directory
}//else: input directory does not exist or is not a directory
}//else: no input value
return result;
}
public abstract String[] list(File directory);
public abstract boolean isDirectory(File file);
}