/*
 * $Id$
 *
 * 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.jifs;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.HashSet;
import java.util.Iterator;
import org.jnode.fs.FSAccessRights;
import org.jnode.fs.FSDirectory;
import org.jnode.fs.FSEntry;
import org.jnode.fs.FSFile;
import org.jnode.fs.FileSystem;

/**
 * JIFSFile <br>
 * The JIFSFile holds information in a StringBuffer.
 *
 * @author Andreas H\u00e4nel
 */
public class JIFSFile implements ExtFSEntry, FSFile {

    protected String name;
    protected StringBuffer data = new StringBuffer();
    protected boolean isvalid = true;

    private FSDirectory parent = null;

    public JIFSFile() {
        refresh();
    }

    public JIFSFile(String name) {
        this.name = name;
    }

    public JIFSFile(String name, FSDirectory parent) {
        this(name);
        this.parent = parent;
        refresh();
    }

    /**
     * Flush the contents of this file to the persistent storage.<br>
     * Does nothing, because the JIFSFile is a virtual File.
     */
    public void flush() throws IOException {
    }

    public long getLength() {
        return data.length();
    }

    protected void cleardata() {
        data.delete(0, data.length());
    }

    protected void addString(String add) {
        data.append(add);
    }

    protected void addStringln(String add) {
        addString(add);
        addStringln();
    }

    protected void addStringln() {
        addString("\n");
    }

    public void refresh() {
        cleardata();
        addString("JIFSFile\nFilename :" + name + "\n");
    }

    // public void read(long fileOffset, byte[] dest, int off, int len){
    public void read(long fileOffset, ByteBuffer destBuf) {
        refresh();
        byte[] readdata = data.toString().getBytes();
        destBuf.put(readdata, (int) fileOffset, destBuf.remaining());
    }

    // public void write(long fileOffset, byte[] src, int off, int len) throws
    // IOException{
    public void write(long fileOffset, ByteBuffer src) throws IOException {
        throw new IOException("can not write to JNIFSFile..");
    }

    public void setLength(long length) {
        return;
    }

    public boolean isValid() {
        return isvalid;
    }

    public FileSystem<?> getFileSystem() {
        // TODO
        return null;
    }

    public boolean isDirty() {
        return false;
    }

    public FSAccessRights getAccessRights() {
        return null;
    }

    public FSDirectory getDirectory() {
        return null;
    }

    public FSFile getFile() {
        return this;
    }

    public long getLastModified() {
        return 0;
    }

    public void setLastModified(long lastModified) {
    }

    public void setName(String name) {
        this.name = name;
    }

    public boolean isDirectory() {
        return false;
    }

    public boolean isFile() {
        return true;
    }

    public FSDirectory getParent() {
        return parent;
    }

    public void setParent(FSDirectory parent) {
        this.parent = parent;
    }

    @Override
    public String getId() {
        return getName();
    }

    public String getName() {
        return name;
    }

    public Iterator<FSEntry> iterator() {
        return new JIFSDirIterator(new HashSet<FSEntry>());
    }

}