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
* returned list is the instance of <code>LibraryHandle</code>.
	 * 
	 * @return the libraries this report design includes directly.
	 */
	public List getLibraries( )
	{
		return getLibraries( IModuleNameSpace.DIRECTLY_INCLUDED_LEVEL );
	}
	/**
	 * Returns the library handle with the given namespace.
	 * 
	 * @param namespace
	 *            the library namespace
	 * @return the library handle with the given namespace
	 */
	public LibraryHandle getLibrary( String namespace )
	{
		Module library = module.getLibraryWithNamespace( namespace,
				IModuleNameSpace.DIRECTLY_INCLUDED_LEVEL );
		if ( library == null )
			return null;
		return (LibraryHandle) library.getHandle( library );
	}
	/**
	 * Returns the library handle with the given file name. The filename can
	 * include directory information, either relative or absolute directory. And
	 * the file should be on the local disk.
	 * 
	 * @param fileName
	 *            the library file name. The filename can include directory