Obtaining query results for components

To specify the types of results the component needs, you must add the relevant QueryConfigs to the QueryState. For example:

QueryState query = getDataSource(request).getQueryState();
CollectionBaseView defaultBaseView = EndecaPortletUtil.getDefaultCollection(request);
query.addFunction(new NavConfig(), defaultBaseView, request.getLocale());
QueryResults results = getDataSource(request).execute(query);

You can then get the underlying Conversation Service API results in order to obtain the data required by your component.

Results discoveryResults = results.getDiscoveryServiceResults();

Before executing the query, you can also make other local modifications to your query state by adding filters or configurations to your query. For example:

String viewKey = request.getParameter(VIEW_KEY_PARAM);
DataSource ds = getDataSource(request);
QueryState query = ds.getQueryState();
SemanticView sView = ds.getCollectionOrSemanticView(viewKey, request.getLocale());
query.addFunction(new ResultsConfig(), sView, request.getLocale());
ExpressionBase expression = getDataSource(request).parseLQLExpression("Region = 'Midwest'");
query.addFunction(new SelectionFilter(expression), sView, request.getLocale());
QueryResults results = getDataSource(request).execute(query);

To persist QueryState changes to the user's session, which also updates the associated components, use setQueryState. For example:

String viewKey = request.getParameter(VIEW_KEY_PARAM);
DataSource ds = getDataSource(request);
QueryState query = ds.getQueryState();
SemanticView sView = ds.getCollectionOrSemanticView(viewKey, request.getLocale());
query.addFunction(new ResultsConfig(), sView, request.getLocale());
ExpressionBase expression = getDataSource(request).parseLQLExpression("Region = 'Midwest'");
query.addFunction(new SelectionFilter(expression), sView, request.getLocale());
ds.setQueryState(query);