public static VersionValue GetUnsavedVersionValue(
String versionUnsavedValue,
IGetter versionGetter,
IVersionType versionType,
ConstructorInfo constructor)
{
if (versionUnsavedValue == null)
{
if (constructor != null)
{
object defaultValue = versionGetter.Get(Instantiate(constructor));
if (defaultValue != null && defaultValue.GetType().IsValueType)
{
return(new VersionValue(defaultValue));
}
else
{
// if the version of a newly instantiated object is not the same
// as the version seed value, use that as the unsaved-value
return
(versionType.IsEqual(versionType.Seed(null), defaultValue)
? VersionValue.VersionUndefined
: new VersionValue(defaultValue));
}
}
else
{
return(VersionValue.VersionUndefined);
}
}
else if ("undefined" == versionUnsavedValue)
{
return(VersionValue.VersionUndefined);
}
else if ("null" == versionUnsavedValue)
{
return(VersionValue.VersionSaveNull);
}
else if ("negative" == versionUnsavedValue)
{
return(VersionValue.VersionNegative);
}
else
{
// NHibernate-specific
try
{
return(new VersionValue(versionType.FromStringValue(versionUnsavedValue)));
}
catch (InvalidCastException ice)
{
throw new MappingException("Bad version type: " + versionType.Name, ice);
}
catch (Exception e)
{
throw new MappingException("Could not parse version unsaved-value: " + versionUnsavedValue, e);
}
}
}
/// <summary>
/// Create an initial version number
/// </summary>
/// <param name="versionType">The <see cref="IVersionType"/> of the versioned property.</param>
/// <param name="session">The current <see cref="ISession" />.</param>
/// <returns>A seed value to initialize the versioned property with.</returns>
public static object Seed(IVersionType versionType, ISessionImplementor session)
{
object seed = versionType.Seed(session);
if (log.IsDebugEnabled)
{
log.Debug("Seeding: " + seed);
}
return seed;
}
/// <summary>
/// Create an initial version number
/// </summary>
/// <param name="versionType">The <see cref="IVersionType"/> of the versioned property.</param>
/// <param name="session">The current <see cref="ISession" />.</param>
/// <returns>A seed value to initialize the versioned property with.</returns>
public static object Seed(IVersionType versionType, ISessionImplementor session)
{
object seed = versionType.Seed(session);
if (log.IsDebugEnabled)
{
log.Debug("Seeding: " + seed);
}
return(seed);
}
void PostProcessInsert(IASTNode insert)
{
var insertStatement = (InsertStatement)insert;
insertStatement.Validate();
SelectClause selectClause = insertStatement.SelectClause;
var persister = insertStatement.IntoClause.Queryable;
if (!insertStatement.IntoClause.IsExplicitIdInsertion)
{
// We need to generate ids as part of this bulk insert.
//
// Note that this is only supported for sequence-style generators and
// post-insert-style generators; basically, only in-db generators
IIdentifierGenerator generator = persister.IdentifierGenerator;
if (!SupportsIdGenWithBulkInsertion(generator))
{
throw new QueryException("can only generate ids as part of bulk insert with either sequence or post-insert style generators");
}
IASTNode idSelectExprNode = null;
var seqGenerator = generator as SequenceGenerator;
if (seqGenerator != null)
{
string seqName = seqGenerator.GeneratorKey();
string nextval = SessionFactoryHelper.Factory.Dialect.GetSelectSequenceNextValString(seqName);
idSelectExprNode = ASTFactory.CreateNode(SQL_TOKEN, nextval);
}
else
{
//Don't need this, because we should never ever be selecting no columns in an insert ... select...
//and because it causes a bug on DB2
/*String idInsertString = sessionFactoryHelper.getFactory().getDialect().getIdentityInsertString();
* if ( idInsertString != null ) {
* idSelectExprNode = getASTFactory().create( HqlSqlTokenTypes.SQL_TOKEN, idInsertString );
* }*/
}
if (idSelectExprNode != null)
{
selectClause.InsertChild(0, idSelectExprNode);
insertStatement.IntoClause.PrependIdColumnSpec();
}
}
bool includeVersionProperty = persister.IsVersioned && !insertStatement.IntoClause.IsExplicitVersionInsertion && persister.VersionPropertyInsertable;
if (includeVersionProperty)
{
// We need to seed the version value as part of this bulk insert
IVersionType versionType = persister.VersionType;
IASTNode versionValueNode;
if (SessionFactoryHelper.Factory.Dialect.SupportsParametersInInsertSelect)
{
versionValueNode = ASTFactory.CreateNode(PARAM, "?");
IParameterSpecification paramSpec = new VersionTypeSeedParameterSpecification(versionType);
((ParameterNode)versionValueNode).HqlParameterSpecification = paramSpec;
_parameters.Insert(0, paramSpec);
}
else
{
if (IsIntegral(versionType))
{
try
{
object seedValue = versionType.Seed(null);
versionValueNode = ASTFactory.CreateNode(SQL_TOKEN, seedValue.ToString());
}
catch (Exception t)
{
throw new QueryException("could not determine seed value for version on bulk insert [" + versionType + "]", t);
}
}
else if (IsDatabaseGeneratedTimestamp(versionType))
{
string functionName = SessionFactoryHelper.Factory.Dialect.CurrentTimestampSQLFunctionName;
versionValueNode = ASTFactory.CreateNode(SQL_TOKEN, functionName);
}
else
{
throw new QueryException("cannot handle version type [" + versionType + "] on bulk inserts with dialects not supporting parameters in insert-select statements");
}
}
selectClause.InsertChild(0, versionValueNode);
insertStatement.IntoClause.PrependVersionColumnSpec();
}
if (insertStatement.IntoClause.IsDiscriminated)
{
string sqlValue = insertStatement.IntoClause.Queryable.DiscriminatorSQLValue;
IASTNode discrimValue = ASTFactory.CreateNode(SQL_TOKEN, sqlValue);
insertStatement.SelectClause.AddChild(discrimValue);
}
}
public void Bind(DbCommand command, IList <Parameter> sqlQueryParametersList, QueryParameters queryParameters, ISessionImplementor session)
{
int position = sqlQueryParametersList.GetEffectiveParameterLocations(IdBackTrack).Single(); // version parameter can't appear more than once
type.NullSafeSet(command, type.Seed(session), position, session);
}
public static VersionValue GetUnsavedVersionValue(
String versionUnsavedValue,
IGetter versionGetter,
IVersionType versionType,
ConstructorInfo constructor)
{
if (versionUnsavedValue == null)
{
if (constructor != null)
{
object defaultValue = versionGetter.Get(Instantiate(constructor));
if (defaultValue != null && defaultValue.GetType().IsValueType)
return new VersionValue(defaultValue);
else
{
// if the version of a newly instantiated object is not the same
// as the version seed value, use that as the unsaved-value
return
versionType.IsEqual(versionType.Seed(null), defaultValue)
? VersionValue.VersionUndefined
: new VersionValue(defaultValue);
}
}
else
{
return VersionValue.VersionUndefined;
}
}
else if ("undefined" == versionUnsavedValue)
{
return VersionValue.VersionUndefined;
}
else if ("null" == versionUnsavedValue)
{
return VersionValue.VersionSaveNull;
}
else if ("negative" == versionUnsavedValue)
{
return VersionValue.VersionNegative;
}
else
{
// NHibernate-specific
try
{
return new VersionValue(versionType.FromStringValue(versionUnsavedValue));
}
catch (InvalidCastException ice)
{
throw new MappingException("Bad version type: " + versionType.Name, ice);
}
catch (Exception e)
{
throw new MappingException("Could not parse version unsaved-value: " + versionUnsavedValue, e);
}
}
}
public int Bind(IDbCommand statement, QueryParameters qp, ISessionImplementor session, int position)
{
type.NullSafeSet(statement, type.Seed(session), position, session);
return(1);
}
