private void Init()
{
this.GenericBytesComparer = new Kooboo.IndexedDB.Btree.Comparer.EqualityComparer(this.StoreSetting.PrimaryKeyLen);
this.TrySetVersionFunction();
Type keytype = typeof(TKey);
Helper.IndexHelper.VerifyIndexType(keytype);
this.IsStringKey = keytype == typeof(string);
// StoreVersionUpgrade.Upgrade(this);
if (KeyConverter != null && ValueConverter != null && this.primaryIndex != null && this.Indexes != null)
{
return;
}
if (KeyConverter == null)
{
KeyConverter = ObjectContainer.GetConverter <TKey>();
}
if (ValueConverter == null)
{
if (this.StoreSetting.UseDefaultNETBinaryFormater)
{
ValueConverter = ObjectContainer.GetBinaryConverter <TValue>();
}
else
{
ValueConverter = ObjectContainer.GetConverter <TValue>(this.SettingColumns);
}
}
this.primaryIndex = new Btree.BtreeIndex <TKey>(this.StoreSetting.PrimaryKey, true, this.StoreSetting.PrimaryKeyLen, Helper.IndexHelper.GetIndexFileName(this.ObjectFolder, this.StoreSetting.PrimaryKey), this.StoreSetting.MaxCacheLevel);
IndexInstanceList <TValue> indexClassInstance = new IndexInstanceList <TValue>();
indexClassInstance.ParseSetting(this.StoreSetting.Indexs, this.ObjectFolder, this.StoreSetting.MaxCacheLevel);
this.Indexes = indexClassInstance;
if (indexClassInstance.items.Count > 0)
{
this.HasIndex = true;
}
}
/// <summary>
/// Create an additional index. The primary key index will be automatically created.
/// When create a new index, it will trigger a rebuild of that index.
/// </summary>
/// <param name="fieldName"></param>
/// <param name="unique"></param>
/// <param name="maxkeylen">For string type of index, you can define a </param>
private void CreateIndex(string fieldName, bool unique, int maxkeylen = 0)
{
lock (_Locker)
{
if (this.Indexes.HasIndex(fieldName))
{
throw new Exception("the index " + fieldName + " already exits");
}
Type keytype = Helper.TypeHelper.GetFieldType <TValue>(fieldName);
Helper.IndexHelper.VerifyIndexType(keytype);
maxkeylen = Helper.KeyHelper.GetKeyLen(keytype, maxkeylen);
var indexinstance = IndexInstanceList <TValue> .GetIndexInstance(ObjectFolder, fieldName, maxkeylen, this.StoreSetting.MaxCacheLevel);
try
{
foreach (var item in this.primaryIndex.allItemCollection(true))
{
var value = this.getValue(item);
indexinstance.Add(value, item);
}
}
catch (Exception)
{
indexinstance.Close();
indexinstance.DelSelf();
throw new Exception("build index failed, can be uniqueness contraints or others.");
}
this.Indexes.items.Add(indexinstance);
this.StoreSetting.Indexs[fieldName] = maxkeylen;
Helper.SettingHelper.UpdateSetting(this.StoreSettingFile, this.StoreSetting);
}
}
