Package oracle.javatools.db.datatypes

Classes related to datatypes in the database API.

See:
Description

Interface Summary

DataType

Interface defines a database datatype (e.g.

Class Summary

BaseDateTimeDataType
BinaryDataType
CharacterDataType
ComplexType	Implementation of DataType for ComplexTypes.
DataTypeAttribute
DataTypeHelper	Helper class for unwrapping the DataTypeUsage object.
DataTypeID	INTERNAL USE ONLY.
DataTypeRegistry	Registry for DataTypes.
DataTypeRegistry.Registerer	A Registerer is responsible for providing allowed DataTypes for a given provider class.
DataTypeSynonym	DataType implementation that delegates all calls to an underlying DataType that it is a "synonym" for.
DataTypeUsage	To "use" a DataType is to refere to it by ID and store values for any attributes that DataType may have (e.g.
DateDataType
NumericDataType
NumericDataType.MinMaxValue	public static class MinMaxValue defines the minimum and maximum value range of integer and floating-point numbers for use by NumericDataType.validateDefaultValue().
ObjectType	Deprecated.
ObjectTypeUsage
PredefinedDataType
PredefinedDataTypeUsage
TimeStampTZDataType
UserDataType	Defines a data type that we 'discovered' when importing or navigating a database, usually from a foreign database, or for un-imported object types.

Enum Summary

ComplexType.SQLJUsingType

Exception Summary

DataTypeValidationException
DefaultValueValidationException

Package oracle.javatools.db.datatypes Description

Classes related to datatypes in the database API. DataType definitions are DBObjects, and are retrieved from a DBObjectProvider using the listDataTypes and getDataType methods. For ComplexType objects the listObjects and getObject methods should be used with their type string ComplexType.TYPE.

Related Documentation

When a datatype is used, for example in a column, the information about it is encapsulated in a DataTypeUsage object. This includes the ID of the datatype, as well as any attributes associated with its use (e.g. size, scale, precision etc). For more information see DataTypeUsage. In general when using DataType and DataTypeUsage objects, the DataTypeHelper class provides a lot of useful helper methods.

Examples

A Column's DataTypeUsage

Getting the size for a varchar2 column:

  final Column ename = table.getColumn( "ENAME" );
  final DataTypeUsage datatypeUsage = ename.getDataTypeUsage();
  final Long size = DataTypeHelper.getLongAttributeValue(
                                         datatypeUsage,
                                         DataTypeAttribute.DATATYPE_SIZE );

Creating a DataTypeUsage

Creating a VARCHAR2 column of size 30:

  final DataType datatype = provider.getDataType( "VARCHAR2" );
  final DataTypeUsage datatypeUsage = datatype.createDefaultUsage();
  datatypeUsage.putAttributeValue( DataTypeAttribute.DATATYPE_SIZE,
                                   30L );

See Also:

oracle.javatools.db