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/elements/structures/ResultSetColumn.java
* Name of the data type member.
	 */
	public static final String DATA_TYPE_MEMBER = "dataType"; 
	/**
	 * Name of the member indicating the native (database) data type code.
	 */
	public static final String NATIVE_DATA_TYPE_MEMBER = "nativeDataType"; 
	/**
	 * The parameter position.
	 */
	private Integer position = null;
	/**
	 * The column name.
	 */
	private String columnName = null;
	/**
	 * The data type of this column.
	 */
	private String dataType = null;
	/**
	 * The native (database) data type.
	 */
	private Integer nativeDataType;
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.IStructure#getStructName()
	 */
	public String getStructName( )
	{