Re: NS_ERROR_NOT_IMPLEMENTED exception in nsIPersistentProperties.save

[Darin Fisher]

Hi Tomas,

Unfortunately, the error code does mean that the code has not been 
written to save properties out to disk.

Darin



Tomas Rollo wrote:

Hello to everybody,

I'm starting to write my first mozilla-based application to learn 
XUL/JS/XPCOM use etc. and I have found following problem:

I have written a wrapper-like class for dealing with properties, but 
when I call nsIPersistentProperties.save method of 
nsIPersistentProperties, I'm getting this exception:

[Exception... "Component returned failure code: 0x80004001 
(NS_ERROR_NOT_IMPLEMENTED) [nsIPersistentProperties.save]"  nsresult: 
"0x80004001 (NS_ERROR_NOT_IMPLEMENTED)"  location: "JS frame :: 
chrome://jam/content/class.Props.js :: anonymous :: line 28"  data: no]

Does that mean that the method is not implemented yet or am I doing 
something foolish? Here's the class code's snippet:

function Props() {
    this.fileName = "e:\jam.properties"; //local filename of the 
properties file
    try {
        this.properties = 
Components.classes["@mozilla.org/persistent-properties;1"].createInstance(Components.interfaces.nsIPersistentProperties); 

    } catch (e) {
        alert("Got an exception: "+e.toString());
    }
}
Props.prototype.saveProps = function() {
    try {
        file = 
Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsILocalFile); 

        file.initWithPath(this.fileName);
       
        outStream = 
Components.classes["@mozilla.org/network/file-output-stream;1"].createInstance(Components.interfaces.nsIFileOutputStream); 

        outStream.init(file,0x01,0644,null);
       
        this.properties.save(outStream,"JAM Settings"); //this is the 
line generating the exception
       
        inStream.close();
    } catch (e) {
        alert("Got an exception: "+e.toString());
    }
}

Thanks to everybody aiming me the right way.

Tomas R.

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