Bug 188596 Some parameter value cannot be passed to report through URL[0002]
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ScalarParameterBean.java
{
		if ( parameter == null )
		{
			return false;
		}
		return parameter.allowNull( );
	}
	/**
	 * Adapt to IScalarParameterDefn's allowBlank( ).
	 * 
	 * @deprecated
	 * @return whether parameter value allows blank.
	 */
	public boolean allowBlank( )
	{
		if ( parameter == null )
		{
			return true;
		}
		return parameter.allowBlank( );
	}
	/**
	 * Adapt to IScalarParameterDefn's allowNewValues( ).
	 * 
	 * @return whether parameter selection list allows new value.
	 */
	public boolean allowNewValues( )
	{
		if ( parameter == null )
		{