public static LambdaExpression Build(DataAccessModel dataAccessModel, SqlDatabaseContext sqlDatabaseContext, SqlQueryProvider queryProvider, Expression expression, ProjectionBuilderScope scope)
{
var projectionBuilder = new ProjectionBuilder(dataAccessModel, sqlDatabaseContext, queryProvider, scope);
var body = projectionBuilder.Visit(expression);
return(Expression.Lambda(body, projectionBuilder.objectProjector, projectionBuilder.dataReader, projectionBuilder.versionParameter, projectionBuilder.dynamicParameters));
}
/// <summary>
/// Builds the lambda expression that will perform the projection
/// </summary>
/// <param name="dataAccessModel">The related data access model</param>
/// <param name="sqlDatabaseContext">The related <see cref="SqlDatabaseContext"/></param>
/// <param name="expression">
/// The expression that performs the projection (can be any expression but usually is a MemberInit expression)
/// </param>
/// <returns>
/// A <see cref="LambdaExpression"/> that takes two parameters: an <see cref="ObjectProjector"/>
/// and an <see cref="IDataReader"/>. The lambda expression will construct a single
/// object for return from the current row in the given <see cref="IDataReader"/>.
/// </returns>
public static LambdaExpression Build(DataAccessModel dataAccessModel, SqlDatabaseContext sqlDatabaseContext, Expression expression, IEnumerable <string> columns)
{
var projectionBuilder = new ProjectionBuilder(dataAccessModel, sqlDatabaseContext, columns);
var body = projectionBuilder.Visit(expression);
return(Expression.Lambda(body, projectionBuilder.objectProjector, projectionBuilder.dataReader, projectionBuilder.dynamicParameters));
}
/// <summary>
/// Builds the lambda expression that will perform the projection
/// </summary>
/// <param name="dataAccessModel">The related data access model</param>
/// <param name="sqlDatabaseContext">The related <see cref="SqlDatabaseContext"/></param>
/// <param name="expression">
/// The expression that performs the projection (can be any expression but usually is a MemberInit expression)
/// </param>
/// <returns>
/// A <see cref="LambdaExpression"/> that takes two parameters: an <see cref="ObjectProjector"/>
/// and an <see cref="IDataReader"/>. The lambda expression will construct a single
/// object for return from the current row in the given <see cref="IDataReader"/>.
/// </returns>
public static LambdaExpression Build(DataAccessModel dataAccessModel, SqlDatabaseContext sqlDatabaseContext, Expression expression, IEnumerable<string> columns)
{
var projectionBuilder = new ProjectionBuilder(dataAccessModel, sqlDatabaseContext, columns);
var body = projectionBuilder.Visit(expression);
return Expression.Lambda(body, projectionBuilder.objectProjector, projectionBuilder.dataReader, projectionBuilder.dynamicParameters);
}
public static LambdaExpression Build(DataAccessModel dataAccessModel, SqlDatabaseContext sqlDatabaseContext, SqlQueryProvider queryProvider, Expression expression, ProjectionBuilderScope scope, out Expression <Func <IDataReader, object[]> > rootKeys)
{
var projectionBuilder = new ProjectionBuilder(dataAccessModel, sqlDatabaseContext, queryProvider, scope);
var body = projectionBuilder.Visit(expression);
if (projectionBuilder.scope.rootPrimaryKeys.Count > 0)
{
rootKeys = Expression.Lambda <Func <IDataReader, object[]> >(Expression.NewArrayInit(typeof(object), projectionBuilder.scope.rootPrimaryKeys), projectionBuilder.dataReader);
}
else
{
rootKeys = null;
}
return(Expression.Lambda(typeof(ObjectReaderFunc <>).MakeGenericType(body.Type), body, projectionBuilder.objectProjector, projectionBuilder.dataReader, projectionBuilder.versionParameter, projectionBuilder.dynamicParameters));
}
public static LambdaExpression Build(DataAccessModel dataAccessModel, SqlDatabaseContext sqlDatabaseContext, SqlQueryProvider queryProvider, Expression expression, ProjectionBuilderScope scope, out Expression<Func<IDataReader, object[]>> rootKeys)
{
var projectionBuilder = new ProjectionBuilder(dataAccessModel, sqlDatabaseContext, queryProvider, scope);
var body = projectionBuilder.Visit(expression);
if (projectionBuilder.scope.rootPrimaryKeys.Count > 0)
{
rootKeys = Expression.Lambda<Func<IDataReader, object[]>>(Expression.NewArrayInit(typeof(object), projectionBuilder.scope.rootPrimaryKeys), projectionBuilder.dataReader);
}
else
{
rootKeys = null;
}
return Expression.Lambda(body, projectionBuilder.objectProjector, projectionBuilder.dataReader, projectionBuilder.versionParameter, projectionBuilder.dynamicParameters, projectionBuilder.filterParameter);
}
