Blurb.

• Getter: Returns the persistence id of this object.
• Setter: None.

• Getter: Returns the persistence id of this object's parent, or null if it doesn't have a parent.
• Setter: None.

• Getter: Returns fully instantiated parent of this object.
• Setter: None.

• subid is a persistence id fragment referring to some child data record for this object.
• Returns: True if there is a record for the specified child data on this object, or False if there is not.
• Throws: Error if: subid contains invalid characters.

Checks to see if there is child data available for this object.

This method is generally only used internally by derived classes. You probably won't need to use this method unless you are actually extending the library itself.

if( tfGet("joe").hasPersistent("femininity") )
	alert( "Joe has a femininity child field!" );

    
	this.= function( subid )
	{
		if( subid == null )
			throw "Null id!";
		return Persistence.has( id+"."+subid );
	}
	
	this.getPersistent = function( subid )
	{
		if( subid == null )
			throw "Null id!";
		if( this.hasPersistent(subid) )
			return Persistence.get( id+"."+subid );
		return null;
	}
	
	this.setPersistent = function( subid, value )
	{
		if( subid == null )
			throw "Null id!";
		return Persistence.set( id+"."+subid, value );
	}
	
	this.resetPersistent = function( subid )
	{
		if( subid == null )
			throw "Null id!";
		return Persistence.reset( id+"."+subid );
	}
    
    this.getName = function()
    {
    	if( this.hasPersistent("name") )
    		return this.getPersistent("name");
    	return null;
    }
    
	this.getAName = function()
	{
		var name = this.getName();
		if( this.getPersistent("nameIsProper") || name.charAt(0) == name.charAt(0).toUpperCase() )
			return name;
		if( this.hasPersistent("nameIrregularArticle") )
			return this.getPersistent("nameIrregularArticle")+" "+name;
		switch( name.charAt(0) )
		{
			case 'a':
			case 'e':
			case 'i':
			case 'o':
			case 'u':
				return "an " + name;
			default:
				return "a " + name;
		}
	}

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