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using System.Collections.Generic;
using System.Text;
namespace Marina.DataAccess.Builders {
public static class DatabaseInsert {
public static IInsertQueryBuilder Into( string tableName ) {
return new InsertQueryBuilder( tableName );
}
private class InsertQueryBuilder : IInsertQueryBuilder {
public InsertQueryBuilder( string tableName ) {
_tableName = tableName;
_parameters = new List< DatabaseCommandParameter >( );
}
public IEnumerable< DatabaseCommandParameter > Parameters() {
return _parameters;
}
public IQuery Build() {
return new Query( this );
}
public IInsertQueryBuilder AddValue< T >( DatabaseColumn column, T value ) {
_parameters.Add( new DatabaseCommandParameter( column.ColumnName, value ) );
return this;
}
public override string ToString() {
StringBuilder builder = new StringBuilder( );
builder.AppendFormat( "INSERT INTO {0} ({1}) VALUES ({2});SELECT @@IDENTITY;", _tableName,
GetParameterNames( string.Empty ),
GetParameterNames( "@" ) );
return builder.ToString( );
}
private string GetParameterNames( string prefix ) {
StringBuilder builder = new StringBuilder( );
foreach ( DatabaseCommandParameter parameter in _parameters ) {
builder.AppendFormat( "{0}{1},", prefix, parameter.ColumnName );
}
builder.Remove( builder.Length - 1, 1 );
return builder.ToString( );
}
private readonly string _tableName;
private readonly IList< DatabaseCommandParameter > _parameters;
}
}
}
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