package edu.isi.karma.controller.command.alignment;
import java.io.PrintWriter;
import org.jgrapht.graph.DirectedWeightedMultigraph;
import org.json.JSONException;
import org.json.JSONStringer;
import org.json.JSONWriter;
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.controller.update.WorksheetUpdateFactory;
import edu.isi.karma.modeling.alignment.Alignment;
import edu.isi.karma.modeling.alignment.AlignmentManager;
import edu.isi.karma.rep.Workspace;
import edu.isi.karma.rep.alignment.DefaultLink;
import edu.isi.karma.rep.alignment.LiteralNode;
import edu.isi.karma.rep.alignment.Node;
import edu.isi.karma.view.VWorkspace;
/**
* Add a Literal Node. This node need not be connected to anything in the Steiner Tree.
* This is used for top-down modeling.
* Nodes added using this command can be removed using the DeleteNodeCommand
* @author dipsy
*
*/
public class AddLiteralNodeCommand extends WorksheetCommand {
private String literalValue;
private String literalType;
private boolean isUri;
private String nodeId;
private String alignmentId;
private static Logger logger = LoggerFactory.getLogger(AddLiteralNodeCommand.class);
// Required for undo
private Alignment oldAlignment;
private DirectedWeightedMultigraph<Node, DefaultLink> oldGraph;
protected AddLiteralNodeCommand(String id, String worksheetId, String alignmentId, String nodeId, String literalValue, String literalType, boolean isUri) {
super(id, worksheetId);
this.alignmentId = alignmentId;
this.literalValue = literalValue;
this.literalType = literalType;
this.isUri = isUri;
this.nodeId = nodeId;
addTag(CommandTag.Modeling);
}
@Override
public String getCommandName() {
return this.getClass().getSimpleName();
}
@Override
public String getTitle() {
if(nodeId == null)
return "Add Literal Node";
return "Edit Literal Node";
}
@Override
public String getDescription() {
return literalValue;
}
@Override
public CommandType getCommandType() {
return CommandType.undoable;
}
@SuppressWarnings("unchecked")
@Override
public UpdateContainer doIt(Workspace workspace) throws CommandException {
logCommand(logger, workspace);
Alignment alignment = AlignmentManager.Instance().getAlignment(
alignmentId);
// Save the original alignment for undo
oldAlignment = alignment.getAlignmentClone();
oldGraph = (DirectedWeightedMultigraph<Node, DefaultLink>) alignment
.getGraph().clone();
UpdateContainer uc = new UpdateContainer();
try {
if(nodeId == null) {
final LiteralNode ln = alignment.addLiteralNode(literalValue, literalType, isUri);
uc.add(new AbstractUpdate() {
@Override
public void generateJson(String prefix, PrintWriter pw,
VWorkspace vWorkspace) {
try {
JSONStringer jsonStr = new JSONStringer();
JSONWriter writer = jsonStr.object();
writer.key("worksheetId").value(worksheetId);
writer.key("updateType").value("AddLiteralNodeUpdate");
writer.key("hNodeId").value(ln.getId());
writer.key("uri").value(literalValue);
writer.endObject();
pw.print(writer.toString());
} catch (JSONException e) {
logger.error("Error occured while writing to JSON!", e);
}
}
});
} else {
alignment.updateLiteralNode(nodeId, literalValue, literalType, isUri);
}
if(!this.isExecutedInBatch())
alignment.align();
} catch (Exception e) {
logger.error("Error adding Literal Node:" , e);
uc.add(new ErrorUpdate("Error adding Literal Node"));
return uc;
}
uc.append(WorksheetUpdateFactory.createSemanticTypesAndSVGAlignmentUpdates(worksheetId, workspace, alignment));
return uc;
}
@Override
public UpdateContainer undoIt(Workspace workspace) {
// Revert to the old alignment
AlignmentManager.Instance()
.addAlignmentToMap(alignmentId, oldAlignment);
oldAlignment.setGraph(oldGraph);
// Get the alignment update
return WorksheetUpdateFactory.createSemanticTypesAndSVGAlignmentUpdates(worksheetId, workspace, oldAlignment);
}
}