Bug 203909 If a parameter have no default value, the value of parameter in computed column should not be "null"[07]
Description: If a parameter have no default value, the value of parameter in computed column should not be "null"[07] Build number: 2.2.1.v20070918-0630 Steps to reproduce: 1, New a String type parameter and left the default value empty 2, New a Dataset and new a computed column 3, Specify the expression to params["parameterName"] 4, Preview in dataset Expected result: The value should not be "null" but blank Actual result: The value of computed column is "null"
data/org.eclipse.birt.report.data.adapter/src/org/eclipse/birt/report/data/adapter/api/script/DataAdapterTopLevelScope.java
return getParamsScriptable();
    	}
    	
    	if ( PROP_REPORTCONTEXT.equals( name ) )
			return getReportContext( );
    	
    	return NOT_FOUND;
    }
    
    /**
     * Gets a object which implements the "reportContext" property
     * @throws InvocationTargetException 
     * @throws InstantiationException 
     * @throws IllegalAccessException 
     */
    private Object getReportContext()
    {
		if ( reportContextProp != null )
			return reportContextProp;
		assert designModule != null;
		
		reportContextProp = new ReportContextObject( designModule );
		
		return reportContextProp;
    }
    
    /**
	 * Gets a scriptable object which implements the "params" property
	 */
	private Scriptable getParamsScriptable( )