StatementExtensions.cs

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using System;

using Deveel.Data.Sql.Expressions;

namespace Deveel.Data.Sql.Statements {
    public static class StatementExtensions {
        public static IStatement Prepare(this IStatement statement, IExpressionPreparer preparer) {
            if (statement is IPreparable)
                statement = ((IPreparable) statement).Prepare(preparer) as IStatement;

            return statement;
        }

        public static IStatement PrepareStatement(this IStatement statement, IRequest context) {
            if (statement is IPreparableStatement)
                statement = ((IPreparableStatement) statement).Prepare(context);

            return statement;
        }

        public static IStatement Prepare(this IStatement statement, IExpressionPreparer preparer, IRequest context) {
            if (statement is IPreparable)
                statement = ((IPreparable) statement).Prepare(preparer) as IStatement;

            if (statement == null)
                return null;

            if (statement is IPreparableStatement)
                statement = ((IPreparableStatement) statement).Prepare(context);

            return statement;
        }
    }
}