serialhashtablefile.java

J2ME上的一个播放器,可以更换皮肤.开源软件.

package inline.sys;

import java.util.*;
import javax.microedition.rms.*;
import javax.microedition.io.*;
import java.io.*;
import inline.fs.*;

public class SerialHashtableFile extends SerialHashtable
{
    private String filename;
    
    public SerialHashtableFile(String fname)  
    {
	super();
	filename = fname;
    }
    
    public void load()
    {
	// get self from file

	if(Provider.valid())
	{
	    try
	    {
		FileAccessible fs = Provider.access();
		fs.open(filename, Connector.READ);
		InputStream is = fs.openInputStream();
		long fz = fs.fileSize();
		if (is!=null && fz>0)
		{
		    byte ba[] = new byte[(int)fz];
		    is.read(ba);
		    is.close();
		    
		    deserializeBytes(ba);
		}
		fs.close();
	    }
	    catch(Exception e)
	    {
		Log.fire("Can't open SHF file: "+e);
	    }
	}
	
    }

    public void save()
    {
	if(Provider.valid())
	{
	    try
	    {
		FileAccessible fs = Provider.access();
		
		while(true)
		{
		    fs.open(filename, Connector.READ_WRITE);

		    if (fs.exists()) 
		    {
			fs.delete();
			fs.close();
			fs.open(filename, Connector.READ_WRITE);
		    }
		    else
		    {
			break;
		    }
		}
		fs.create();
		
		OutputStream os = fs.openOutputStream();
		if (os!=null)
		{
		    byte[] ba = serializeBytes();
		    
		    os.write(ba);
		    os.close();
		}
		fs.close();
	    }
	    catch(Exception e)
	    {
		Log.fire("Can't save SHF file: "+e);
	    }
	}
    }
}