public void RegisterDynamicEntity(DynamicEntityDefinition entityDefinition, bool ensureCompatibility)
{
if (entityDefinition.Fields.Count == 0)
{
throw new ArgumentException("EntityDefinition must contain at least one field");
}
// verify this is a unique entity name
// check the type-defined entities
lock (m_entities)
{
var existing = m_entities.FirstOrDefault(e => e.EntityName == entityDefinition.EntityName);
if (existing != null)
{
if (!ensureCompatibility)
{
throw new EntityAlreadyExistsException(entityDefinition.EntityName);
}
else
{
m_entities[entityDefinition.EntityName] = entityDefinition;
}
}
else
{
m_entities.Add(entityDefinition);
}
}
OnDynamicEntityRegistration(entityDefinition, ensureCompatibility);
}
public override DynamicEntityDefinition DiscoverDynamicEntity(string entityName)
{
var table = m_session.Data.GetTable(entityName);
if (table == null)
{
return(null);
}
var fields = new List <FieldAttribute>();
foreach (var field in table.Fields)
{
fields.Add(new FieldAttribute()
{
FieldName = field.Name,
IsPrimaryKey = field.IsPrimaryKey.HasValue ? field.IsPrimaryKey.Value : false,
DataType = field.TypeName.ParseToDbType()
});
}
var entityDefinition = new DynamicEntityDefinition(entityName, fields);
RegisterEntityInfo(entityDefinition);
return(entityDefinition);
}
protected override void OnDynamicEntityRegistration(DynamicEntityDefinition definition, bool ensureCompatibility)
{
string name = definition.EntityName;
if (!TableExists(name))
{
var fields = new List <Field>();
foreach (var field in definition.Fields)
{
if (ReservedWords.Contains(field.FieldName, StringComparer.InvariantCultureIgnoreCase))
{
throw new ReservedWordException(field.FieldName);
}
fields.Add(FieldFactory.GetFieldForAttribute(field, definition.EntityAttribute.KeyScheme));
}
m_session.Data.CreateTable(name, name, fields);
}
else
{
ValidateTable(definition);
}
}
public static DynamicEntity AsDynamicEntity(this AzureEntity entity, DynamicEntityDefinition definition)
{
var de = new DynamicEntity(definition.EntityName);
de.Fields.Add("PartitionKey", entity.PartitionKey);
de.Fields.Add("RowKey", entity.RowKey);
foreach (var f in entity.Fields)
{
if (!definition.Fields.ContainsField(f.Name))
{
continue;
}
if ((f.Value.ToString() == string.Empty) && (definition.Fields[f.Name].DataType != System.Data.DbType.String))
{
// we store an empty string for non-string 'null' values in the Table Service
de.Fields.Add(f.Name, null);
}
else
{
de.Fields.Add(f.Name, f.Value);
}
}
return(de);
}
public virtual void RegisterDynamicEntity(DynamicEntityDefinition entityDefinition)
{
foreach (var f in entityDefinition.Fields)
{
if (entityDefinition.EntityAttribute.KeyScheme == KeyScheme.Identity)
{
throw new NotSupportedException("The current provider does not currently support Identity dynamic entities");
}
}
RegisterDynamicEntity(entityDefinition, false);
}
protected override void OnDynamicEntityRegistration(DynamicEntityDefinition definition, bool ensureCompatibility)
{
// create the table if necessary
TableService.Tables.CreateTableIfNotExist(definition.EntityName);
// store the definiton. later we'll use it for detecting nulls, ignoring columns, etc
if (!m_dynamicDefinitions.ContainsKey(definition.EntityName))
{
m_dynamicDefinitions.Add(definition.EntityName, definition);
}
else if (ensureCompatibility)
{
m_dynamicDefinitions[definition.EntityName] = definition;
}
else
{
throw new Exception("Dynamic type already registered");
}
}
private DynamicEntityDefinition(DynamicEntityDefinition source)
{
var entityAttribute = new EntityAttribute(source.EntityAttribute.KeyScheme);
entityAttribute.NameInStore = source.EntityAttribute.NameInStore;
this.EntityType = typeof(DynamicEntityDefinition);
this.Initialize(entityAttribute, this.EntityType);
// TODO make a copy of these?
this.Fields.AddRange(source.Fields);
var k = this.Fields.FirstOrDefault(c => c.IsPrimaryKey);
if (k != null)
{
this.PrimaryKeyColumnName = k.FieldName;
}
}
protected abstract void OnDynamicEntityRegistration(DynamicEntityDefinition definition, bool ensureCompatibility);
public override DynamicEntityDefinition DiscoverDynamicEntity(string entityName)
{
if (!TableExists(entityName))
{
return(null);
}
var connection = GetConnection(true);
try
{
using (var cmd = GetNewCommandObject())
{
cmd.Connection = connection;
cmd.Transaction = CurrentTransaction;
cmd.CommandText = string.Format("SELECT COLUMN_NAME, ORDINAL_POSITION, IS_NULLABLE, DATA_TYPE, NUMERIC_PRECISION, NUMERIC_SCALE, CHARACTER_MAXIMUM_LENGTH "
+ "FROM information_schema.columns WHERE TABLE_NAME = '{0}' ORDER BY ORDINAL_POSITION", entityName);
var fields = new List <FieldAttribute>();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var name = reader.GetString(0);
var nullable = string.Compare(reader.GetString(2), "YES", true) == 0;
var type = reader.GetString(3).ParseToDbType();
var field = new FieldAttribute()
{
DataType = type,
FieldName = name,
AllowsNulls = nullable,
};
if (!reader.IsDBNull(4))
{
field.Precision = Convert.ToInt32(reader.GetValue(4));
}
if (!reader.IsDBNull(5))
{
field.Scale = Convert.ToInt32(reader.GetValue(5));
}
if (!reader.IsDBNull(6))
{
field.Length = Convert.ToInt32(reader.GetValue(6));
}
fields.Add(field);
}
}
cmd.CommandText = string.Format(
"SELECT ac.name, ind.is_primary_key, ind.is_unique, ic.is_descending_key, col.collation_name, idc.name " +
"FROM sys.indexes ind " +
"INNER JOIN sys.index_columns ic " +
" ON ind.object_id = ic.object_id and ind.index_id = ic.index_id " +
"INNER JOIN sys.columns col " +
" ON ic.object_id = col.object_id and ic.column_id = col.column_id " +
"INNER JOIN sys.tables t " +
" ON ind.object_id = t.object_id " +
"INNER JOIN sys.identity_columns idc " +
" ON col.object_id = idc.object_id and col.column_id = idc.column_id " +
"INNER JOIN sys.columns ac " +
" ON ac.object_id = col.object_id and ac.column_id = col.column_id " +
"WHERE t.name = '{0}'", entityName);
string identiyColumn = null;
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var column = reader.GetString(0);
var pk = Convert.ToBoolean(reader.GetValue(1));
var unique = Convert.ToBoolean(reader.GetValue(2));
var field = fields.FirstOrDefault(f => f.FieldName == column);
if (pk)
{
field.IsPrimaryKey = true;
}
else
{
var isdescending = Convert.ToInt32(reader.GetValue(3));
field.SearchOrder = isdescending == 0 ? FieldSearchOrder.Ascending : FieldSearchOrder.Descending;
}
if (unique)
{
field.RequireUniqueValue = true;
}
identiyColumn = reader.GetString(5);
}
}
var entityDefinition = new DynamicEntityDefinition(
entityName,
fields,
string.IsNullOrEmpty(identiyColumn) ? KeyScheme.None : KeyScheme.Identity);
RegisterEntityInfo(entityDefinition);
return(entityDefinition);
}
}
finally
{
DoneWithConnection(connection, true);
}
}
public override void RegisterDynamicEntity(DynamicEntityDefinition entityDefinition)
{
base.RegisterDynamicEntity(entityDefinition, true);
}
public override DynamicEntityDefinition DiscoverDynamicEntity(string entityName)
{
if (!TableExists(entityName))
{
throw new EntityNotFoundException(entityName);
}
var connection = GetConnection(true);
try
{
using (var cmd = GetNewCommandObject())
{
cmd.Connection = connection;
cmd.Transaction = CurrentTransaction;
cmd.CommandText = string.Format("SELECT COLUMN_NAME, ORDINAL_POSITION, IS_NULLABLE, DATA_TYPE, NUMERIC_PRECISION, NUMERIC_SCALE FROM information_schema.columns WHERE TABLE_NAME = '{0}' ORDER BY ORDINAL_POSITION", entityName);
var fields = new List <FieldAttribute>();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var name = reader.GetString(0);
var nullable = string.Compare(reader.GetString(2), "YES", true) == 0;
var type = reader.GetString(3).ParseToDbType();
var field = new FieldAttribute()
{
DataType = type,
FieldName = name,
AllowsNulls = nullable,
};
if (!reader.IsDBNull(4))
{
field.Precision = Convert.ToInt32(reader.GetValue(4));
}
if (!reader.IsDBNull(5))
{
field.Scale = Convert.ToInt32(reader.GetValue(5));
}
fields.Add(field);
}
}
// get PK info
cmd.CommandText = string.Format(
"SELECT COLUMN_NAME, CONSTRAINT_TYPE " +
"FROM information_schema.table_constraints t " +
"LEFT JOIN information_schema.key_column_usage k " +
"USING(constraint_name,table_schema,table_name) " +
"WHERE TABLE_NAME = '{0}'", entityName);
// result will be PRIMARY_KEY or UNIQUE
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var column = reader.GetString(0);
var t = reader.GetString(1);
var pk = t == "PRIMARY_KEY";
var unique = t == "UNIQUE";
var field = fields.FirstOrDefault(f => f.FieldName == column);
if (pk)
{
field.IsPrimaryKey = true;
}
if (unique)
{
field.RequireUniqueValue = true;
}
}
}
var entityDefinition = new DynamicEntityDefinition(entityName, fields);
RegisterEntityInfo(entityDefinition);
return(entityDefinition);
}
}
finally
{
DoneWithConnection(connection, true);
}
}
public override DynamicEntityDefinition DiscoverDynamicEntity(string entityName)
{
if (!TableExists(entityName))
{
return(null);
}
var connection = GetConnection(true);
try
{
using (var cmd = GetNewCommandObject())
{
cmd.Connection = connection;
cmd.Transaction = CurrentTransaction;
cmd.CommandText = string.Format("PRAGMA table_info({0})", entityName);
// cid, name, type, notnull, dflt_value, pk
var fields = new List <FieldAttribute>();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var cid = reader.GetInt64(0);
var name = reader.GetString(1);
var type = reader.GetString(2).ParseToDbType();
var nullable = reader.GetInt64(3) == 0;
// 4 == default value - TODO
var isPK = reader.GetInt64(5) == 1;
var field = new FieldAttribute()
{
DataType = type,
FieldName = name,
AllowsNulls = nullable,
IsPrimaryKey = isPK
};
fields.Add(field);
}
}
cmd.CommandText = string.Format("SELECT 1 FROM sqlite_master WHERE tbl_name='{0}' AND sql LIKE '%AUTOINCREMENT%'", entityName);
var autoIncrement = cmd.ExecuteScalar();
// TODO: handle index metadata (ascending/descending, unique, etc)
// PRAGMA index_list(TABLENAME)
// seq | name | unique
// PRAGMA index_info(INDEXNAME)
// seqno | cid | name |
var entityDefinition = new DynamicEntityDefinition(entityName, fields);
try
{
if (Convert.ToInt64(autoIncrement) == 1L)
{
entityDefinition.EntityAttribute.KeyScheme = KeyScheme.Identity;
}
}
catch
{
// not auto-increment
}
RegisterEntityInfo(entityDefinition);
return(entityDefinition);
}
}
finally
{
DoneWithConnection(connection, true);
}
}
public override DynamicEntityDefinition DiscoverDynamicEntity(string entityName)
{
if (!TableExists(entityName))
{
return(null);
}
var connection = GetConnection(true);
try
{
using (var cmd = GetNewCommandObject())
{
cmd.Connection = connection;
cmd.Transaction = CurrentTransaction;
cmd.CommandText = string.Format("SELECT COLUMN_NAME, ORDINAL_POSITION, IS_NULLABLE, DATA_TYPE, NUMERIC_PRECISION, NUMERIC_SCALE FROM information_schema.columns WHERE TABLE_NAME = '{0}' ORDER BY ORDINAL_POSITION", entityName);
var fields = new List <FieldAttribute>();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var name = reader.GetString(0);
var nullable = string.Compare(reader.GetString(2), "YES", true) == 0;
var type = reader.GetString(3).ParseToDbType();
var field = new FieldAttribute()
{
DataType = type,
FieldName = name,
AllowsNulls = nullable,
};
if (!reader.IsDBNull(4))
{
field.Precision = Convert.ToInt32(reader.GetValue(4));
}
if (!reader.IsDBNull(5))
{
field.Scale = Convert.ToInt32(reader.GetValue(5));
}
fields.Add(field);
}
}
cmd.CommandText = string.Format("SELECT COLUMN_NAME, PRIMARY_KEY, [UNIQUE], COLLATION FROM information_schema.indexes WHERE TABLE_NAME = '{0}'", entityName);
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var column = reader.GetString(0);
var pk = Convert.ToBoolean(reader.GetValue(1));
var unique = Convert.ToBoolean(reader.GetValue(2));
var field = fields.FirstOrDefault(f => f.FieldName == column);
if (pk)
{
field.IsPrimaryKey = true;
}
else
{
var collation = Convert.ToInt32(reader.GetValue(3));
field.SearchOrder = collation == 1 ? FieldSearchOrder.Ascending : FieldSearchOrder.Descending;
}
if (unique)
{
field.RequireUniqueValue = true;
}
}
}
var entityDefinition = new DynamicEntityDefinition(entityName, fields);
RegisterEntityInfo(entityDefinition);
return(entityDefinition);
}
}
finally
{
DoneWithConnection(connection, true);
}
}
public override DynamicEntityDefinition DiscoverDynamicEntity(string entityName)
{
if (!TableExists(entityName))
{
throw new EntityNotFoundException(entityName);
}
var connection = GetConnection(true);
try
{
using (var cmd = GetNewCommandObject())
{
cmd.Connection = connection;
cmd.Transaction = CurrentTransaction;
cmd.CommandText = string.Format(
"SELECT COLUMN_NAME, NULLABLE, DATA_TYPE, DATA_PRECISION, DATA_SCALE FROM all_tab_cols "
+ " WHERE UPPER(TABLE_NAME) = UPPER('{0}') ORDER BY COLUMN_ID", entityName);
var fields = new List <FieldAttribute>();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var name = reader.GetString(0);
var nullable = string.Compare(reader.GetString(1), "Y", true) == 0;
var type = ParseDbType(reader.GetString(2));
var field = new FieldAttribute()
{
DataType = type,
FieldName = name,
AllowsNulls = nullable,
};
if (!reader.IsDBNull(3))
{
field.Precision = Convert.ToInt32(reader.GetValue(3));
}
if (!reader.IsDBNull(4))
{
field.Scale = Convert.ToInt32(reader.GetValue(4));
}
fields.Add(field);
}
}
//CONSTRAINT_TYPE (from 11gR2 docs)
//C - Check constraint on a table
//P - Primary key
//U - Unique key
//R - Referential integrity
//V - With check option, on a view
//O - With read only, on a view
//H - Hash expression
//F - Constraint that involves a REF column
//S - Supplemental logging
// INDEX_TYPE
// ASC == NORMAL
// DESC == FUNCTION-BASED NORMAL
cmd.CommandText = string.Format(
"SELECT cons.constraint_type, cons.constraint_name, cols.column_name, i.index_type " +
"FROM all_constraints cons " +
"LEFT OUTER JOIN all_cons_columns cols " +
"ON cons.table_name = cols.table_name " +
"LEFT OUTER JOIN all_indexes i " +
"ON cons.index_name = i.index_name " +
"WHERE UPPER(cols.table_name) = UPPER('{0}')"
, entityName);
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var column = reader.GetString(2);
var ct = reader.GetString(0).TrimEnd();
var pk = false;
var unique = false;
switch (ct)
{
case "P":
pk = true;
unique = true;
break;
case "U":
unique = true;
break;
}
var field = fields.FirstOrDefault(f => f.FieldName == column);
if (pk)
{
field.IsPrimaryKey = true;
}
else
{
var isdescending = reader.GetString(3).IndexOf("FUNTION-BASED", StringComparison.InvariantCultureIgnoreCase) >= 0;
field.SearchOrder = isdescending ? FieldSearchOrder.Descending : FieldSearchOrder.Ascending;
}
if (unique)
{
field.RequireUniqueValue = true;
}
}
}
var entityDefinition = new DynamicEntityDefinition(entityName, fields);
RegisterEntityInfo(entityDefinition);
return(entityDefinition);
}
}
finally
{
DoneWithConnection(connection, true);
}
}
