/// <summary>
/// Initializes a new instance of <see cref="QueryModel"/>
/// </summary>
/// <param name="mainFromClause">The <see cref="Clauses.MainFromClause"/> of the query. This is the starting point of the query, generating items
/// that are filtered and projected by the query.</param>
/// <param name="selectClause">The <see cref="SelectClause"/> of the query. This is the end point of
/// the query, it defines what is actually returned for each of the items coming from the <see cref="MainFromClause"/> and passing the
/// <see cref="BodyClauses"/>. After it, only the <see cref="ResultOperators"/> modify the result of the query.</param>
public QueryModel(MainFromClause mainFromClause, SelectClause selectClause)
{
ArgumentUtility.CheckNotNull("mainFromClause", mainFromClause);
ArgumentUtility.CheckNotNull("selectClause", selectClause);
_uniqueIdentifierGenerator = new UniqueIdentifierGenerator();
MainFromClause = mainFromClause;
SelectClause = selectClause;
BodyClauses = new ObservableCollection <IBodyClause>();
BodyClauses.CollectionChanged += BodyClauses_CollectionChanged;
ResultOperators = new ObservableCollection <ResultOperatorBase>();
ResultOperators.CollectionChanged += ResultOperators_CollectionChanged;
}
/// <summary>
/// Initializes a new instance of <see cref="QueryModel"/>
/// </summary>
/// <param name="mainFromClause">The <see cref="Clauses.MainFromClause"/> of the query. This is the starting point of the query, generating items
/// that are filtered and projected by the query.</param>
/// <param name="selectClause">The <see cref="SelectClause"/> of the query. This is the end point of
/// the query, it defines what is actually returned for each of the items coming from the <see cref="MainFromClause"/> and passing the
/// <see cref="BodyClauses"/>. After it, only the <see cref="ResultOperators"/> modify the result of the query.</param>
public QueryModel (MainFromClause mainFromClause, SelectClause selectClause)
{
ArgumentUtility.CheckNotNull ("mainFromClause", mainFromClause);
ArgumentUtility.CheckNotNull ("selectClause", selectClause);
_uniqueIdentifierGenerator = new UniqueIdentifierGenerator();
MainFromClause = mainFromClause;
SelectClause = selectClause;
BodyClauses = new ObservableCollection<IBodyClause>();
BodyClauses.CollectionChanged += BodyClauses_CollectionChanged;
ResultOperators = new ObservableCollection<ResultOperatorBase>();
ResultOperators.CollectionChanged += ResultOperators_CollectionChanged;
}