Bug 141255 No error for the incompatible parameter value
Steps to reproduce: 1.New a decimal parameter, set the default value to "aaa" 2.Preview the report by "Preview" tab Expected result: Error to say the incompatible parameter value Actual result: Parameter request page keeps poping up till input the decimal value Note: if preview in Web Viewer, error will be thrown out, but no exception description.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ViewerAttributeBean.java
*/
	protected Object getParamValueObject( HttpServletRequest request,
			ParameterDefinition parameterObj ) throws ReportServiceException
	{
		String paramName = parameterObj.getName( );
		Object paramValueObj = super
				.getParamValueObject( request, parameterObj );
		if ( paramValueObj != null )
			return paramValueObj;
		if ( ParameterAccessor.isDesigner( request ) && this.configMap != null
				&& this.configMap.containsKey( paramName ) )
		{
			
			paramValueObj = this.configMap.get( paramName );
		}
		else if ( this.parameterMap != null
				&& this.parameterMap.containsKey( paramName ) )
		{
			
			paramValueObj = this.parameterMap.get( paramName );
		}
		return paramValueObj;
	}
	/**
	 * @return the maxRows
	 */
	public int getMaxRows( )
	{
		return maxRows;
	}