Bug 199714 NPE with invalid url[0002]
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ViewerAttributeBean.java
{
						this.exception = e;
						break;
					}
				}
			}
			else
			{
				
				if ( this.parametersAsString.containsKey( paramName ) )
				{
					params.put( paramName, null );
				}
				else
				{
					
					params.put( paramName, this.defaultValues.get( paramName ) );
				}
			}
		}
		return params;
	}
	/**
	 * Returns parameter default values map
	 * 
	 * @param design
	 * @param parameterList
	 * @param request
	 * @param options
	 * @return