/*
* $Id$
*
* Copyright (C) 2003-2015 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.fs.ramfs;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import org.jnode.fs.FSAccessRights;
import org.jnode.fs.FSDirectory;
import org.jnode.fs.FSEntry;
import org.jnode.fs.FSEntryCreated;
import org.jnode.fs.FSEntryLastAccessed;
import org.jnode.fs.FSFile;
import org.jnode.fs.FileSystem;
/**
* A Directory implementation in the system RAM
*
* @author peda
*/
public class RAMDirectory implements FSEntry, FSDirectory, FSEntryCreated, FSEntryLastAccessed {
private RAMFileSystem filesystem;
private RAMDirectory parent;
private String directoryName;
private long created;
private long lastModified;
private long lastAccessed;
private FSAccessRights accessRights;
/* if file is deleted, it is no longer valid */
private boolean isValid = true;
private HashMap<String, FSEntry> entries;
/**
* Constructor for a new RAMDirectory
*
* @param fs
* @param parent
* @param name
*/
public RAMDirectory(final RAMFileSystem fs, final RAMDirectory parent, final String name) {
this.filesystem = fs;
this.parent = parent;
this.directoryName = name;
this.created = this.lastModified = this.lastAccessed = System.currentTimeMillis();
// TODO: accessRights
entries = new HashMap<String, FSEntry>();
}
@Override
public String getId() {
return getName();
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSEntry#getName()
*/
public String getName() {
return directoryName;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSEntry#getParent()
*/
public FSDirectory getParent() {
return parent;
}
public long getCreated() throws IOException {
return created;
}
public long getLastModified() throws IOException {
return lastModified;
}
public long getLastAccessed() throws IOException {
return lastAccessed;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSEntry#isFile()
*/
public boolean isFile() {
return false;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSEntry#isDirectory()
*/
public boolean isDirectory() {
return true;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSEntry#setName(java.lang.String)
*/
public void setName(String newName) throws IOException {
// TODO: check for special chars / normalize name
directoryName = newName;
}
public void setCreated(long created) throws IOException {
this.created = created;
}
public void setLastModified(long lastModified) throws IOException {
this.lastModified = lastModified;
}
public void setLastAccessed(long lastAccessed) throws IOException {
this.lastAccessed = lastAccessed;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSEntry#getFile()
*/
public FSFile getFile() throws IOException {
throw new IOException("Not a file");
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSEntry#getDirectory()
*/
public FSDirectory getDirectory() throws IOException {
return this;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSEntry#getAccessRights()
*/
public FSAccessRights getAccessRights() throws IOException {
return accessRights;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSEntry#isDirty()
*/
public boolean isDirty() throws IOException {
return false;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSObject#isValid()
*/
public boolean isValid() {
return isValid;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSObject#getFileSystem()
*/
public FileSystem<?> getFileSystem() {
return filesystem;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSDirectory#iterator()
*/
public Iterator<? extends FSEntry> iterator() throws IOException {
return entries.values().iterator();
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSDirectory#getEntry(java.lang.String)
*/
public FSEntry getEntry(String name) throws IOException {
return entries.get(name);
}
@Override
public FSEntry getEntryById(String id) throws IOException {
return getEntry(id);
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSDirectory#addFile(java.lang.String)
*/
public FSEntry addFile(String name) throws IOException {
RAMFile file = new RAMFile(this, name);
entries.put(name, file);
setLastModified(System.currentTimeMillis());
return file;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSDirectory#addDirectory(java.lang.String)
*/
public FSEntry addDirectory(String name) throws IOException {
RAMDirectory dir = new RAMDirectory(filesystem, this, name);
entries.put(name, dir);
setLastModified(System.currentTimeMillis());
return dir;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSDirectory#remove(java.lang.String)
*/
public void remove(String name) throws IOException {
FSEntry entry = entries.remove(name);
if (entry == null)
throw new IOException("Entry not found");
if (entry instanceof RAMFile) {
RAMFile file = (RAMFile) entry;
file.remove();
setLastModified(System.currentTimeMillis());
} else {
RAMDirectory dir = (RAMDirectory) entry;
dir.remove();
setLastModified(System.currentTimeMillis());
}
}
/**
* removes the directory and all entries inside that directory
*
* @throws IOException
*/
private void remove() throws IOException {
Iterator<FSEntry> itr = entries.values().iterator();
while (itr.hasNext()) {
FSEntry entry = itr.next();
if (entry instanceof RAMFile) {
RAMFile file = (RAMFile) entry;
file.remove();
} else {
RAMDirectory dir = (RAMDirectory) entry;
dir.remove();
}
}
parent = null;
}
/**
* (non-Javadoc)
*
* @see org.jnode.fs.FSDirectory#flush()
*/
public void flush() throws IOException {
// nothing todo here
}
}