DeleteNodeConsolidator.java

package edu.isi.karma.controller.command.alignment;

import java.util.Iterator;
import java.util.List;

import org.apache.commons.lang3.tuple.ImmutablePair;
import org.apache.commons.lang3.tuple.Pair;

import edu.isi.karma.controller.command.Command;
import edu.isi.karma.controller.command.ICommand;
import edu.isi.karma.controller.history.CommandConsolidator;
import edu.isi.karma.rep.Workspace;

public class DeleteNodeConsolidator extends CommandConsolidator {

	@Override
	public Pair<ICommand, Object> consolidateCommand(List<ICommand> commands,
			ICommand newCommand, Workspace workspace) {
		if (newCommand instanceof DeleteNodeCommand) {
			String model = newCommand.getModel();
			String nodeId = ((DeleteNodeCommand)newCommand).getNodeId();
			if(nodeId != null) {
				Iterator<ICommand> itr = commands.iterator();
				while(itr.hasNext()) {
					ICommand tmp = itr.next();
					if (tmp.getModel().equals(model)
							&& ((Command)tmp).getOutputColumns().equals(((Command)newCommand).getOutputColumns())
							&& (tmp instanceof AddLiteralNodeCommand || tmp instanceof AddNodeCommand)) {
						String tmpNodeId;
						if(tmp instanceof AddLiteralNodeCommand) {
							tmpNodeId = ((AddLiteralNodeCommand)tmp).getNodeId();
						} else {
							tmpNodeId = ((AddNodeCommand)tmp).getNodeId();
						}
						if(tmpNodeId != null && tmpNodeId.equals(nodeId))
							return new ImmutablePair<>(tmp, (Object)newCommand);
					}
				}
			}
		}
		return null;
	}

}