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/core/Module.java
*/
	public List getErrorList( )
	{
		List allErrors = getAllErrors( );
		List list = ErrorDetail.getSemanticErrors( allErrors,
				DesignFileException.DESIGN_EXCEPTION_SEMANTIC_ERROR );
		list.addAll( ErrorDetail.getSemanticErrors( allErrors,
				DesignFileException.DESIGN_EXCEPTION_SYNTAX_ERROR ) );
		return list;
	}
	/**
	 * Returns a list containing warnings during parsing the module file.
	 * 
	 * @return a list containing parsing warnings. Each element in the list is
	 *         <code>ErrorDetail</code>.
	 * 
	 * @see ErrorDetail
	 */
	public List getWarningList( )
	{
		List allErrors = getAllErrors( );
		return ErrorDetail.getSemanticErrors( allErrors,
				DesignFileException.DESIGN_EXCEPTION_SEMANTIC_WARNING );
	}
	/**
	 * Performs a semantic check of this element, and all its contained
	 * elements. Records errors in the module context.
	 * <p>
	 * Checks the contents of this element.
	 *