package org.simantics.interop.update.model;

import java.util.Collection;
import java.util.HashSet;

import org.simantics.db.Statement;
import org.simantics.utils.datastructures.Pair;

public class UpdateList {
	private HashSet<Pair<Statement, Statement>> changes;
	
	public UpdateList() {
		changes = new HashSet<>();
	}
	
	public UpdateList(Collection<Pair<Statement, Statement>> changes) {
		this.changes = new HashSet<>(changes);
	}
	
	public Collection<Pair<Statement, Statement>> getChanges() {
		return changes;
	}
	
	public void addChange(Pair<Statement, Statement> change) {
		changes.add(change);
	}
	
	public void removeChange(Pair<Statement, Statement> change) {
		changes.remove(change);
	}
	
	public void clear() {
		changes.clear();
	}
}