Bug 149251 Inconsistent Handling of a Non-inheritable ROM Property
For a ROM property defined to be non-inheritable, an empty string property value should be consistently handled as an empty string, not as null. For example, an oda.dataSource extension defines a data source property with canInherit=false. When a oda-data-source handle get saved in a report design, it correctly includes the tag for such property, even when an empty string value is specified. <oda-data-source extensionID="my.oda.plugin" name="my Data Source" id="24"> ... <property name="ApplicationServer"></property> </oda-data-source> However, later when using the DE API to read its property value, a null is returned. Then when the report design is subsequently saved, the property tag is lost. Expects that an empty string value of a non-inhertiable property should be preserved.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
*/
	public void save( ) throws IOException
	{
		String fileName = getFileName( );
		assert fileName != null;
		if ( fileName == null )
			return;
		module.prepareToSave( );
		module.getWriter( ).write( new File( getModule( ).getFileName( ) ) );
		module.onSave( );
	}
	/**
	 * Saves the design to the file name provided. The file name is saved in the
	 * design, and subsequent calls to <code>save( )</code> will save to this
	 * new name.
	 * 
	 * @param newName
	 *            the new file name
	 * @throws IOException
	 *             if the file cannot be saved
	 * 
	 * @see #save()
	 */
	public void saveAs( String newName ) throws IOException
	{
		setFileName( newName );
		save( );
	}
	/**
	 * Writes the report design to the given output stream. The caller must call