/// <summary>
/// Allows this <see cref="HsqlCommandBuilder"/>
/// to handle additional parameter properties.
/// </summary>
/// <param name="parameter">
/// A <see cref="DbParameter"/> to which the additional
/// modifications are applied.
/// </param>
/// <param name="row">
/// The <see cref="DataRow"/> from the schema table
/// provided by <see cref="DbDataReader.GetSchemaTable"/>.
/// </param>
/// <param name="statementType">
/// The type of command being generated; INSERT, UPDATE or DELETE.
/// </param>
/// <param name="whereClause">
/// <c>true</c> if the parameter is part of the update or delete
/// <c>WHERE</c> clause; <c>false</c> if it is part of the insert
/// or update values.
/// </param>
protected override void ApplyParameterInfo(
DbParameter parameter,
DataRow row,
StatementType statementType,
bool whereClause)
{
HsqlParameter parm = (HsqlParameter)parameter;
int?providerType = row[SchemaTableColumn.ProviderType] as int?;
if (providerType != null)
{
parm.ProviderType = (HsqlProviderType)providerType;
}
}
internal void DeriveParametersInternal()
{
if (CommandType != CommandType.StoredProcedure)
{
throw new InvalidOperationException(string.Format(
"Operation not supported for CommandType: "
+ CommandType.ToString()));
}
Prepare();
HsqlStatement statement = m_statement;
ParameterMetaData pmd = statement.ParameterDescriptor.metaData;
string[] parameterNames = pmd.colNames;
int count = parameterNames.Length;
HsqlParameter[] parameters = new HsqlParameter[count];
for (int i = 0; i < count; i++)
{
string name = parameterNames[i];
ParameterMode mode = (ParameterMode)pmd.paramMode[i];
int type = pmd.colTypes[i];
int precision = pmd.colSizes[i];
int scale = pmd.colScales[i];
int nullability = pmd.colNullable[i];
HsqlProviderType providerType = (HsqlProviderType)type;
DbType dbType = HsqlConvert.ToDbType(providerType);
ParameterDirection? direction = HsqlConvert.ToParameterDirection(mode);
bool? isNullable = IsNullable(nullability);
bool isCharacter = IsCharacterType(type);
bool isNumber = (!isCharacter) && IsNumberType(type);
bool isTemporal = !(isCharacter || isNumber) && IsTemporalType(type);
int size = ToBufferSize(type, precision);
if (isCharacter)
{
precision = 0;
scale = 0;
}
else if (isNumber || isTemporal)
{
if (precision == 0)
{
precision = ToDefaultPrecision(type);
}
}
HsqlParameter parameter = new HsqlParameter();
parameter.DbType = dbType;
if (direction != null)
{
parameter.Direction = direction.Value;
}
if (isNullable != null)
{
parameter.IsNullable = isNullable.Value;
}
parameter.ParameterName = name;
parameter.Precision = (byte)Math.Min(byte.MaxValue, precision);
parameter.ProviderType = providerType;
parameter.Scale = (byte)Math.Min(byte.MaxValue, scale);
parameter.Size = size;
parameter.SourceVersion = DataRowVersion.Default;
parameters[i] = parameter;
}
HsqlParameterCollection pc = Parameters;
pc.Clear();
foreach (HsqlParameter parameter in parameters)
{
pc.Add(parameter);
}
}
/// <summary>
/// Returns a new cloned instance of this parameter.
/// </summary>
/// <remarks>
/// <para>
/// Special handling is provided when <c>Value</c> is
/// of type <c>byte[]</c>, <c>char[]</c> or <c>ICloneable</c>.
/// </para>
/// <para>
/// Case 1:
/// </para>
/// <para>
/// When the source <c>Value</c> is of type <c>byte[]</c> or
/// <c>char[]</c>, then the source <c>Offset</c> and <c>Size</c>
/// properties are taken into consideration. Specifically, the
/// destination <c>Offset</c> is assigned zero (0) and the destination
/// <c>Value</c> is assigned a copy of the source <c>Value</c> that
/// starts from the source <c>Offset</c>. When the source <c>Size</c>
/// is zero (0), then <c>Value.Length - Offset</c> elements are
/// copied; otherwise, the lower of <c>Size</c> or <c>Value.Length
/// - Offset</c> elements are copied.
/// </para>
/// <para>
/// Case 2:
/// </para>
/// <para>
/// When the source <c>Value</c> is <c>ICloneable</c> then the target
/// <c>Value</c> is assigned a clone of the source <c>Value</c>.
/// </para>
/// <para>
/// Case 3:
/// </para>
/// <para>
/// The target <c>Value</c> is assigned directly from the source
/// <c>Value</c>.
/// </para>
/// </remarks>
/// <returns>
/// The cloned <see cref="HsqlParameter"/> instance.
/// </returns>
public HsqlParameter Clone()
{
HsqlParameter parameter = new HsqlParameter();
parameter.m_assigned = m_assigned;
parameter.m_dataRowVersion = m_dataRowVersion;
parameter.m_dbType = m_dbType;
parameter.m_direction = m_direction;
parameter.m_forceSize = m_forceSize;
parameter.m_hsqlDbType = m_hsqlDbType;
parameter.m_inferProviderType = m_inferProviderType;
parameter.m_name = m_name;
parameter.m_nullable = m_nullable;
parameter.m_precision = m_precision;
parameter.m_scale = m_scale;
parameter.m_size = m_size;
parameter.m_sourceColumn = m_sourceColumn;
parameter.m_sourceColumnNullMapping = m_sourceColumnNullMapping;
parameter.m_suppressed = m_suppressed;
byte[] bytes;
char[] chars;
if (null != (bytes = m_value as byte[]))
{
int targetLength = bytes.Length - m_offset;
if ((m_size != 0) && (m_size < targetLength))
{
targetLength = m_size;
}
byte[] targetValue = new byte[Math.Max(targetLength, 0)];
Buffer.BlockCopy(
bytes,
m_offset,
targetValue,
0,
targetValue.Length);
parameter.m_offset = 0;
parameter.m_value = targetValue;
}
else if (null != (chars = m_value as char[]))
{
int targetLength = chars.Length - m_offset;
if ((m_size != 0) && (m_size < targetLength))
{
targetLength = m_size;
}
char[] targetValue = new char[Math.Max(targetLength, 0)];
Buffer.BlockCopy(
chars,
m_offset,
targetValue,
0,
targetValue.Length * 2);
parameter.m_offset = 0;
parameter.m_value = targetValue;
}
else
{
parameter.m_offset = m_offset;
ICloneable cloneable = m_value as ICloneable;
parameter.m_value = (cloneable == null)
? m_value
: cloneable.Clone();
}
return parameter;
}
internal void DeriveParametersInternal()
{
if (CommandType != CommandType.StoredProcedure)
{
throw new InvalidOperationException(string.Format(
"Operation not supported for CommandType: "
+ CommandType.ToString()));
}
Prepare();
HsqlStatement statement = m_statement;
ParameterMetaData pmd = statement.ParameterDescriptor.metaData;
string[] parameterNames = pmd.colNames;
int count = parameterNames.Length;
HsqlParameter[] parameters = new HsqlParameter[count];
for (int i = 0; i < count; i++)
{
string name = parameterNames[i];
ParameterMode mode = (ParameterMode)pmd.paramMode[i];
int type = pmd.colTypes[i];
int precision = pmd.colSizes[i];
int scale = pmd.colScales[i];
int nullability = pmd.colNullable[i];
HsqlProviderType providerType = (HsqlProviderType)type;
DbType dbType = HsqlConvert.ToDbType(providerType);
ParameterDirection?direction = HsqlConvert.ToParameterDirection(mode);
bool?isNullable = IsNullable(nullability);
bool isCharacter = IsCharacterType(type);
bool isNumber = (!isCharacter) && IsNumberType(type);
bool isTemporal = !(isCharacter || isNumber) && IsTemporalType(type);
int size = ToBufferSize(type, precision);
if (isCharacter)
{
precision = 0;
scale = 0;
}
else if (isNumber || isTemporal)
{
if (precision == 0)
{
precision = ToDefaultPrecision(type);
}
}
HsqlParameter parameter = new HsqlParameter();
parameter.DbType = dbType;
if (direction != null)
{
parameter.Direction = direction.Value;
}
if (isNullable != null)
{
parameter.IsNullable = isNullable.Value;
}
parameter.ParameterName = name;
parameter.Precision = (byte)Math.Min(byte.MaxValue, precision);
parameter.ProviderType = providerType;
parameter.Scale = (byte)Math.Min(byte.MaxValue, scale);
parameter.Size = size;
parameter.SourceVersion = DataRowVersion.Default;
parameters[i] = parameter;
}
HsqlParameterCollection pc = Parameters;
pc.Clear();
foreach (HsqlParameter parameter in parameters)
{
pc.Add(parameter);
}
}
/// <summary>
/// Returns a new cloned instance of this parameter.
/// </summary>
/// <remarks>
/// <para>
/// Special handling is provided when <c>Value</c> is
/// of type <c>byte[]</c>, <c>char[]</c> or <c>ICloneable</c>.
/// </para>
/// <para>
/// Case 1:
/// </para>
/// <para>
/// When the source <c>Value</c> is of type <c>byte[]</c> or
/// <c>char[]</c>, then the source <c>Offset</c> and <c>Size</c>
/// properties are taken into consideration. Specifically, the
/// destination <c>Offset</c> is assigned zero (0) and the destination
/// <c>Value</c> is assigned a copy of the source <c>Value</c> that
/// starts from the source <c>Offset</c>. When the source <c>Size</c>
/// is zero (0), then <c>Value.Length - Offset</c> elements are
/// copied; otherwise, the lower of <c>Size</c> or <c>Value.Length
/// - Offset</c> elements are copied.
/// </para>
/// <para>
/// Case 2:
/// </para>
/// <para>
/// When the source <c>Value</c> is <c>ICloneable</c> then the target
/// <c>Value</c> is assigned a clone of the source <c>Value</c>.
/// </para>
/// <para>
/// Case 3:
/// </para>
/// <para>
/// The target <c>Value</c> is assigned directly from the source
/// <c>Value</c>.
/// </para>
/// </remarks>
/// <returns>
/// The cloned <see cref="HsqlParameter"/> instance.
/// </returns>
public HsqlParameter Clone()
{
HsqlParameter parameter = new HsqlParameter();
parameter.m_assigned = m_assigned;
parameter.m_dataRowVersion = m_dataRowVersion;
parameter.m_dbType = m_dbType;
parameter.m_direction = m_direction;
parameter.m_forceSize = m_forceSize;
parameter.m_hsqlDbType = m_hsqlDbType;
parameter.m_inferProviderType = m_inferProviderType;
parameter.m_name = m_name;
parameter.m_nullable = m_nullable;
parameter.m_precision = m_precision;
parameter.m_scale = m_scale;
parameter.m_size = m_size;
parameter.m_sourceColumn = m_sourceColumn;
parameter.m_sourceColumnNullMapping = m_sourceColumnNullMapping;
parameter.m_suppressed = m_suppressed;
byte[] bytes;
char[] chars;
if (null != (bytes = m_value as byte[]))
{
int targetLength = bytes.Length - m_offset;
if ((m_size != 0) && (m_size < targetLength))
{
targetLength = m_size;
}
byte[] targetValue = new byte[Math.Max(targetLength, 0)];
Buffer.BlockCopy(
bytes,
m_offset,
targetValue,
0,
targetValue.Length);
parameter.m_offset = 0;
parameter.m_value = targetValue;
}
else if (null != (chars = m_value as char[]))
{
int targetLength = chars.Length - m_offset;
if ((m_size != 0) && (m_size < targetLength))
{
targetLength = m_size;
}
char[] targetValue = new char[Math.Max(targetLength, 0)];
Buffer.BlockCopy(
chars,
m_offset,
targetValue,
0,
targetValue.Length * 2);
parameter.m_offset = 0;
parameter.m_value = targetValue;
}
else
{
parameter.m_offset = m_offset;
ICloneable cloneable = m_value as ICloneable;
parameter.m_value = (cloneable == null)
? m_value
: cloneable.Clone();
}
return(parameter);
}