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#region MIT license
//
// MIT license
//
// Copyright (c) 2007-2008 Jiri Moudry, Pascal Craponne
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#endregion
using System;
using System.Collections.Generic;
using System.Linq;
using DbLinq.Schema;
using DbLinq.Schema.Dbml;
namespace DbLinq.Vendor.Implementation
{
partial class SchemaLoader
{
/// <summary>
/// Gets the primary keys.
/// </summary>
/// <param name="table">The table.</param>
/// <returns></returns>
protected static List<string> GetPrimaryKeys(Table table)
{
return (from c in table.Type.Columns where c.IsPrimaryKey select c.Name).ToList();
}
/// <summary>
/// Checks for problematic names on columns
/// We currently have 1 case, where column is equal to table name
/// </summary>
/// <param name="schema"></param>
protected virtual void CheckColumnsName(Database schema)
{
foreach (var table in schema.Tables)
{
foreach (var column in table.Type.Columns)
{
// THE case
if (column.Member == table.Type.Name)
{
// now, we try to append 1, then 2, etc.
var appendValue = 0;
for (; ; )
{
var newColumnMember = column.Member + ++appendValue;
if (!table.Type.Columns.Any(c => c.Member == newColumnMember))
{
column.Member = newColumnMember;
}
}
}
}
}
}
/// <summary>
/// Checks for name conflicts, given lambdas to correct on conflicts
/// </summary>
/// <param name="schema"></param>
/// <param name="tableNamedAssociationRenamer"></param>
/// <param name="columnNamedAssociationRenamer"></param>
protected virtual void CheckConstraintsName(Database schema,
Func<Association, string> tableNamedAssociationRenamer,
Func<Association, string> columnNamedAssociationRenamer)
{
foreach (var table in schema.Tables)
{
foreach (var association in table.Type.Associations)
{
var localAssociation = association;
if (association.Member == table.Type.Name)
association.Member = tableNamedAssociationRenamer(association);
else if ((from column in table.Type.Columns where column.Member == localAssociation.Member select column).FirstOrDefault() != null)
{
association.Member = columnNamedAssociationRenamer(association);
}
}
}
}
/// <summary>
/// Checks for name conflicts
/// </summary>
/// <param name="schema"></param>
protected virtual void CheckConstraintsName(Database schema)
{
CheckConstraintsName(schema,
association => association.ThisKey.Replace(',', '_') + association.Member,
association => association.Member + association.Type);
}
/// <summary>
/// Generates storage fields, given a formatting method
/// </summary>
/// <param name="schema"></param>
/// <param name="storageGenerator"></param>
protected virtual void GenerateStorageAndMemberFields(Database schema, Func<string, string> storageGenerator)
{
foreach (var table in schema.Tables)
{
foreach (var column in table.Type.Columns)
{
column.Storage = storageGenerator(column.Member);
}
HashSet<string> storageFields = new HashSet<string>();
HashSet<string> memberFields = new HashSet<string>();
foreach (var column in table.Type.Columns)
{
storageFields.Add(column.Storage);
memberFields.Add(column.Member);
}
foreach (var association in table.Type.Associations)
{
association.Storage = storageGenerator(association.Member);
//Associations may contain the same foreign key more than once - add a number suffix to duplicates
for (var suffix = 0; ; suffix++)
{
var name = suffix == 0 ? association.Storage : association.Storage + suffix;
if (storageFields.Contains(name)) continue;
association.Storage = name;
storageFields.Add(name);
break;
}
for (var suffix = 0; ; suffix++)
{
var name = suffix == 0 ? association.Member : association.Member + suffix;
if (memberFields.Contains(name)) continue;
association.Member = name;
memberFields.Add(name);
break;
}
}
}
}
/// <summary>
/// Generates all storage fields
/// </summary>
/// <param name="schema"></param>
protected virtual void GenerateStorageAndMemberFields(Database schema)
{
GenerateStorageAndMemberFields(schema, delegate(string name)
{
//jgm 2008June: pre-pended underscore to have same storage format as MS
// TODO: add an option for this behavior
var storage = "_" + NameFormatter.Format(name, Case.camelCase);
if (storage == name)
storage = "_" + storage;
return storage;
});
}
}
}
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