/** Create a properly-configured grid with default settings, on first load. */
public void loadTupleTableConfig(Database db, MolgenisRequest request, TupleTable tupleTable)
throws TableException, IOException {
tupleTable.setDb(db);
final JQGridConfiguration config =
new JQGridConfiguration(getId(), "Name", tupleTableBuilder.getUrl(), "test", tupleTable);
final String jqJsonConfig = new Gson().toJson(config);
request.getResponse().getOutputStream().println(jqJsonConfig);
}
/**
* Function to build a datastructure filled with rows from a {@link TupleTable}, to be serialised
* by Gson and displayed from there by a jqGrid.
*
* @param rowCount The number of rows to select.
* @param totalPages The total number of pages of data (ie. dependent on size of dataset and nr.
* of rows per page)
* @param page The selected page.
* @param table The Tupletable from which to read the data.
* @return
*/
public static JQGridResult buildJQGridResults(
final int rowCount, final int totalPages, final int page, final TupleTable table)
throws TableException {
final JQGridResult result = new JQGridResult(page, totalPages, rowCount);
for (final Tuple row : table.getRows()) {
System.out.println("check: " + row);
final LinkedHashMap<String, String> rowMap = new LinkedHashMap<String, String>();
final List<String> fieldNames = row.getFieldNames();
for (final String fieldName : fieldNames) {
final String rowValue = !row.isNull(fieldName) ? row.getString(fieldName) : "null";
rowMap.put(fieldName, rowValue); // TODO encode to HTML
}
result.rows.add(rowMap);
}
return result;
}
/**
* Render a particular subset of data from a {@link TupleTable} to a particular {@link Renderer}.
*
* @param request The request encoding the particulars of the rendering to be done.
* @param postData The selected page (only relevant for {@link JQGridRenderer} rendering)
* @param totalPages The total number of pages (only relevant for {@link JQGridRenderer}
* rendering)
* @param tupleTable The table from which to render the data.
*/
private void renderData(
MolgenisRequest request, JQGridPostData postData, int totalPages, final TupleTable tupleTable)
throws TableException {
tupleTable.setDb(request.getDatabase());
String strViewType = request.getString("viewType");
if (StringUtils.isEmpty(strViewType)) {
strViewType = "JQ_GRID";
}
try {
final ViewFactory viewFactory = new ViewFactoryImpl();
final Renderers.Renderer view = viewFactory.createView(strViewType);
view.export(request, request.getString("caption"), tupleTable, totalPages, postData.page);
} catch (final Exception e) {
throw new TableException(e);
}
}
/**
* Handle a particular {@link MolgenisRequest}, and render into an {@link OutputStream}.
* Particulars handled:
*
* <ul>
* <li>Wrap the desired data source in the appropriate instantiation of {@link TupleTable}.
* <li>Determine which {@link Operation} the request is asking to handle.
* <li>Apply proper sorting and filter rules.
* <li>Select the appropriate view towards which to export/render.
* <li>Select and render the data.
* </ul>
*
* @param db The database to connect to
* @param request The {@link MolgenisRequest} tuple that encodes the request to handle
* @param out The {@link OutputStream} to render to.
*/
public void handleRequest(Database db, Tuple request, OutputStream out)
throws HandleRequestDelegationException {
try {
final TupleTable tupleTable = tupleTableBuilder.create(db, request);
final Operation operation =
StringUtils.isNotEmpty(request.getString(OPERATION))
? Operation.valueOf(request.getString(OPERATION))
: Operation.RENDER_DATA;
switch (operation) {
case LOAD_CONFIG:
loadTupleTableConfig(db, (MolgenisRequest) request, tupleTable);
break;
case LOAD_TREE:
// risky: we give it all columns which would fail if there
// are many
final String treeNodes = JQueryUtil.getDynaTreeNodes(tupleTable.getAllColumns());
((MolgenisRequest) request).getResponse().getOutputStream().print(treeNodes);
break;
case RENDER_DATA:
final List<QueryRule> rules = new ArrayList<QueryRule>();
// parse the request into post data
final JQGridPostData postData = new JQGridPostData(request);
// convert any filters to query rules
final List<QueryRule> filterRules = createQueryRulesFromJQGridRequest(postData.filters);
if (CollectionUtils.isNotEmpty(filterRules)) {
if (tupleTable instanceof FilterableTupleTable) {
rules.addAll(filterRules);
((FilterableTupleTable) tupleTable).setFilters(rules);
}
}
final int rowCount = tupleTable.getCount();
final int totalPages = (int) Math.ceil(rowCount / postData.rows);
// update page
postData.page = Math.min(postData.page, totalPages);
final int offset = Math.max((postData.page - 1) * postData.rows, 0);
final String exportSelection = request.getString("exportSelection");
if (!StringUtils.equalsIgnoreCase(exportSelection, "ALL")) {
// data.rows == limit
tupleTable.setLimit(postData.rows);
// data.rows * data.page
tupleTable.setOffset(offset);
}
if (StringUtils.isNotEmpty(postData.sidx) && tupleTable instanceof FilterableTupleTable) {
final Operator sortOperator =
StringUtils.equals(postData.sord, "asc")
? QueryRule.Operator.SORTASC
: QueryRule.Operator.SORTDESC;
rules.add(new QueryRule(sortOperator, postData.sidx));
}
if (tupleTable instanceof FilterableTupleTable) {
((FilterableTupleTable) tupleTable).setFilters(rules);
}
renderData(((MolgenisRequest) request), postData, totalPages, tupleTable);
}
} catch (final Exception e) {
throw new HandleRequestDelegationException(e);
}
}
