private SqlFormatter(QueryLanguage language, bool forDebug)
{
this.language = language;
this.sb = new StringBuilder();
this.aliases = new Dictionary<TableAlias, string>();
this.forDebug = forDebug;
}
private QueryBinder(QueryMapper mapper, Expression root)
{
this.mapper = mapper;
this.language = mapper.Translator.Linguist.Language;
this.map = new Dictionary<ParameterExpression, Expression>();
this.groupByMap = new Dictionary<Expression, GroupByInfo>();
this.root = root;
}
private ColumnProjector(QueryLanguage language, Expression expression, IEnumerable<ColumnDeclaration> existingColumns, TableAlias newAlias, IEnumerable<TableAlias> existingAliases)
{
this.language = language;
this.newAlias = newAlias;
this.existingAliases = new HashSet<TableAlias>(existingAliases);
this.map = new Dictionary<ColumnExpression, ColumnExpression>();
if (existingColumns != null)
{
this.columns = new List<ColumnDeclaration>(existingColumns);
this.columnNames = new HashSet<string>(existingColumns.Select(c => c.Name));
}
else
{
this.columns = new List<ColumnDeclaration>();
this.columnNames = new HashSet<string>();
}
this.candidates = Nominator.Nominate(language, expression);
}
internal static HashSet<Expression> Nominate(QueryLanguage language, Expression expression)
{
Nominator nominator = new Nominator(language);
nominator.Visit(expression);
return nominator.candidates;
}
public static string Format(Expression expression, QueryLanguage language)
{
TSqlFormatter formatter = new TSqlFormatter(language);
formatter.Visit(expression);
return formatter.ToString();
}
public static Expression Rewrite(QueryLanguage language, Expression expression)
{
return new OrderByRewriter(language).Visit(expression);
}
public QueryTranslator(QueryLanguage language, QueryMapping mapping, QueryPolicy policy)
{
this.linguist = language.CreateLinguist(this);
this.mapper = mapping.CreateMapper(this);
this.police = policy.CreatePolice(this);
}
private SkipToNestedOrderByRewriter(QueryLanguage language)
{
this.language = language;
}
public static Expression Rewrite(QueryPolicy policy, QueryLanguage language, Expression expression)
{
return new ClientJoinedProjectionRewriter(policy, language).Visit(expression);
}
private SkipToRowNumberRewriter(QueryLanguage language)
{
this.language = language;
}
private SingletonProjectionRewriter(QueryLanguage language)
{
this.language = language;
}
protected TSqlFormatter(QueryLanguage language)
: base(language)
{
}
public static ProjectedColumns ProjectColumns(QueryLanguage language, Expression expression, IEnumerable<ColumnDeclaration> existingColumns, TableAlias newAlias, IEnumerable<TableAlias> existingAliases)
{
ColumnProjector projector = new ColumnProjector(language, expression, existingColumns, newAlias, existingAliases);
Expression expr = projector.Visit(expression);
return new ProjectedColumns(expr, projector.columns.AsReadOnly());
}
/// <summary>
/// Initializes a new instance of the <see cref="SqlFormatter"/> class.
/// </summary>
/// <param name="language">The language.</param>
protected SqlFormatter(QueryLanguage language)
: this(language, false)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="OleDbQueryProvider"/> class.
/// </summary>
/// <param name="connection">The connection.</param>
/// <param name="language">The language.</param>
/// <param name="mapping">The mapping.</param>
/// <param name="policy">The policy.</param>
public OleDbQueryProvider(OleDbConnection connection, QueryLanguage language, QueryMapping mapping, QueryPolicy policy)
: base(connection, language, mapping, policy)
{
}
private SQLiteFormatter(QueryLanguage language)
: base(language)
{
}
/// <summary>
/// 实例化新的一个 <see cref="QueryLinguist"/> 类对象。
/// </summary>
/// <param name="language">The language.</param>
/// <param name="translator">The translator.</param>
public QueryLinguist(QueryLanguage language, QueryTranslator translator)
{
this.language = language;
this.translator = translator;
}
private AccessFormatter(QueryLanguage language)
: base(language)
{
}
public static ProjectedColumns ProjectColumns(QueryLanguage language, Expression expression, IEnumerable<ColumnDeclaration> existingColumns, TableAlias newAlias, params TableAlias[] existingAliases)
{
return ProjectColumns(language, expression, existingColumns, newAlias, (IEnumerable<TableAlias>)existingAliases);
}
private RelationshipBinder(QueryMapper mapper)
{
this.mapper = mapper;
this.mapping = mapper.Mapping;
this.language = mapper.Translator.Linguist.Language;
}
public static Expression Rewrite(QueryLanguage language, Expression expression)
{
return new SkipToRowNumberRewriter(language).Visit(expression);
}
private CrossApplyRewriter(QueryLanguage language)
{
this.language = language;
}
public static Expression Rewrite(QueryLanguage language, Expression expression)
{
return new SingletonProjectionRewriter(language).Visit(expression);
}
protected DbExpressionWriter(TextWriter writer, QueryLanguage language)
: base(writer)
{
this.language = language;
}
private ClientJoinedProjectionRewriter(QueryPolicy policy, QueryLanguage language)
{
this.policy = policy;
this.language = language;
}
public static void Write(TextWriter writer, QueryLanguage language, Expression expression)
{
new DbExpressionWriter(writer, language).Visit(expression);
}
private OrderByRewriter(QueryLanguage language)
{
this.language = language;
this.isOuterMostSelect = true;
}
public static string WriteToString(QueryLanguage language, Expression expression)
{
StringWriter sw = new StringWriter();
Write(sw, language, expression);
return sw.ToString();
}
private Nominator(QueryLanguage language)
{
this.language = language;
this.candidates = new HashSet<Expression>();
this.isBlocked = false;
}
public static Expression Rewrite(QueryLanguage language, Expression expr)
{
return new AggregateRewriter(language, expr).Visit(expr);
}