package edu.isi.karma.controller.command.worksheet;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.HashSet;
import org.json.JSONArray;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import edu.isi.karma.controller.command.CommandException;
import edu.isi.karma.controller.command.CommandType;
import edu.isi.karma.controller.command.WorksheetCommand;
import edu.isi.karma.controller.update.AbstractUpdate;
import edu.isi.karma.controller.update.ErrorUpdate;
import edu.isi.karma.controller.update.UpdateContainer;
import edu.isi.karma.rep.HNode;
import edu.isi.karma.rep.HTable;
import edu.isi.karma.rep.Worksheet;
import edu.isi.karma.rep.Workspace;
import edu.isi.karma.view.VWorkspace;
public class GetHeadersCommand extends WorksheetCommand {
private String hNodeId;
private String commandName;
private static Logger logger = LoggerFactory
.getLogger(FoldCommand.class);
protected GetHeadersCommand(String id, String worksheetId, String hNodeId, String commandName) {
super(id, worksheetId);
this.hNodeId = hNodeId;
this.commandName = commandName;
// TODO Auto-generated constructor stub
}
@Override
public String getCommandName() {
return GetHeadersCommand.class.getSimpleName();
}
@Override
public String getTitle() {
return "Get Headers";
}
@Override
public String getDescription() {
return null;
}
@Override
public CommandType getCommandType() {
return CommandType.notInHistory;
}
@Override
public UpdateContainer doIt(Workspace workspace) throws CommandException {
Worksheet worksheet = workspace.getWorksheet(worksheetId);
HTable ht = worksheet.getHeaders();
if (hNodeId.compareTo("") != 0) {
HNode hNode = workspace.getFactory().getHNode(hNodeId);
HTable parentHT = workspace.getFactory().getHTable(hNode.getHTableId());
if (commandName.compareTo("GroupBy") == 0 || commandName.compareTo("Fold") == 0 || commandName.compareTo("Glue") == 0)
ht = hNode.getNestedTable();
else
ht = parentHT;
}
if (ht == null) {
return new UpdateContainer();
}
final JSONArray array = new JSONArray();
for (HNode hn : ht.getHNodes()) {
if (!commandName.equals("Unfold") || (!hn.hasNestedTable() && !hn.getId().equals(hNodeId)) ) {
JSONObject obj = new JSONObject();
obj.put("ColumnName", hn.getColumnName());
obj.put("HNodeId", hn.getId());
HashMap<String, HashSet<HNode>> appliedCommands = hn.getAppliedCommands();
JSONArray commands = new JSONArray();
for(String command : appliedCommands.keySet()) {
JSONObject com = new JSONObject();
com.put("CommandName", command);
HashSet<HNode> cNodes = appliedCommands.get(command);
JSONArray cols = new JSONArray();
for(HNode cNode : cNodes) {
JSONObject col = new JSONObject();
col.put("HNodeId", cNode.getId());
col.put("ColumnName", cNode.getColumnName());
cols.put(col);
}
com.put("Columns", cols);
commands.put(com);
}
obj.put("appliedCommands", commands);
array.put(obj);
}
}
try {
return new UpdateContainer(new AbstractUpdate() {
@Override
public void generateJson(String prefix, PrintWriter pw, VWorkspace vWorkspace) {
pw.print(array.toString());
}
});
} catch (Exception e) {
logger.error("Error occurred while fetching graphs!", e);
return new UpdateContainer(new ErrorUpdate("Error occurred while fetching graphs!"));
}
}
@Override
public UpdateContainer undoIt(Workspace workspace) {
return null;
}
}