IReportRunnable report = context.getReportRunnable();
			IReportEngine engine = report.getReportEngine();
			IGetParameterDefinitionTask task = engine
					.createGetParameterDefinitionTask(report);
			Collection<IParameterSelectionChoice> selectionList = null;
			Collection<IParameterDefnBase> paramsAndGroups = task
					.getParameterDefns(true);
			for (IParameterDefnBase paramOrGroup : paramsAndGroups) {
				if (paramOrGroup instanceof CascadingParameterGroupDefn) {
					List<IParameterDefnBase> members = ((CascadingParameterGroupDefn) paramOrGroup)
							.getContents();
					int groupSize = members.size();
					int indexInGroup;
					for (indexInGroup = 0; indexInGroup < groupSize
							&& !parameterName.equals(members.get(indexInGroup)
									.getName()); indexInGroup++) {
					}
					if (indexInGroup < groupSize) {
						// found!
						Object[] prevChoices = new Object[indexInGroup];
						for (int i = 0; i < indexInGroup; i++) {
							prevChoices[i] = context.getParameterValue(members
									.get(i).getName());
						}
						selectionList = task.getSelectionListForCascadingGroup(
								paramOrGroup.getName(), prevChoices);
						break;
					}
				}
			}
			if (selectionList == null) {
				// parameter isn't in a cascading group
				selectionList = task.getSelectionList(parameterName);
			}
			Object parameterValue = context.getParameterValue(parameterName);