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/DesignElement.java
return getName( );
	}
	/**
	 * All descriptive text should be "elided" to a length of 30 characters. To
	 * elide the text, find the first white-space before the limit, truncate the
	 * string after that point, and append three dots "...".
	 * <p>
	 * 
	 * @param displayLabel
	 *            the display label to be elided.
	 * @return the elided display label.
	 */
	protected String limitStringLength( String displayLabel )
	{
		if ( displayLabel == null )
			return null;
		if ( displayLabel.length( ) > MAX_DISPLAY_LABEL_LEN )
		{
			displayLabel = displayLabel.substring( 0, MAX_DISPLAY_LABEL_LEN );
			int pos = displayLabel.lastIndexOf( " " ); 
			if ( pos != -1 )
			{
				displayLabel = displayLabel.substring( 0, pos );
			}
			return displayLabel + "..."; 
		}
		return displayLabel;
	}
	/**
	 * Generates a clone copy of this element. When a report element is cloned,