org.fastnate.generator.context

Class PrimitiveProperty<E,T>

java.lang.Object

org.fastnate.generator.context.Property<E,T>

org.fastnate.generator.context.SingularProperty<E,T>

org.fastnate.generator.context.PrimitiveProperty<E,T>

Type Parameters:

E - The type of the container class

T - The type of the primitive

Direct Known Subclasses:

GeneratedIdProperty, VersionProperty

public class PrimitiveProperty<E,T>
extends SingularProperty<E,T>

Describes a singular primitive property of an EntityClass. A primitive property is not only a Java primitive, but it includes all properties that are of a type that is easily mapped to an SQL expression using a ValueConverter. This includes:

• Java primitive types (boolean, char, byte, short, int, long, float, double)
• Their wrapper types (Boolean, Character, Byte, Short, Integer, Long, Float, Double)
• String
• BigInteger and BigDecimal
• Date and its subclasses (Date, Time and Timestamp)
• Calendar
• byte arrays (byte[] and Byte[])
• character array (char[] and Character[])
• Enumerated types (Enum)
• User-defined serializable types

Author:

Tobias Liefke, Andreas Penski

Constructor Summary

Constructors

Constructor and Description
PrimitiveProperty(GeneratorContext context, String table, AttributeAccessor attribute, javax.persistence.Column columnMetadata) Instantiates a new primitive property.

Method Summary

Modifier and Type	Method and Description
void	addInsertExpression(E entity, InsertStatement statement) Adds an expression according to the current value of the property for the given entity to an SQL insert statement.
static <T,E extends Enum<E>> ValueConverter<T>	createConverter(AttributeAccessor attribute, Class<T> targetType, boolean mapKey) Creates a converter for a primitive type.
protected String	getDefaultValue(AttributeAccessor attribute) Finds the default value from the given attribute.
protected GeneratorDialect	getDialect() Resolves the current dialect from the context.
String	getExpression(E entity, boolean whereExpression) Creates the expression for the current value of the given entity in SQL.
String	getPredicate(E entity) Creates an SQL predicate that references all entities that have the same value as the given entity.

Methods inherited from class org.fastnate.generator.context.SingularProperty

getColumn, isTableColumn

Methods inherited from class org.fastnate.generator.context.Property

createPostInsertStatements, createPreInsertStatements, failIfRequired, findReferencedEntities, generatePendingStatements, getName, getValue, isRequired, setValue, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

PrimitiveProperty

public PrimitiveProperty(GeneratorContext context,
                         String table,
                         AttributeAccessor attribute,
                         javax.persistence.Column columnMetadata)

Instantiates a new primitive property.

Parameters:

context - the current context

table - the table that the column belongs to

attribute - the attribute of the property

columnMetadata - the column metadata

Method Detail

createConverter

public static <T,E extends Enum<E>> ValueConverter<T> createConverter(AttributeAccessor attribute,
                                                                      Class<T> targetType,
                                                                      boolean mapKey)

Creates a converter for a primitive type.

Type Parameters:

T - the generic type

E - the element type

Parameters:

attribute - the accessor for the attribute that contains the value, not nessecarily of the target type

targetType - the primitive type

mapKey - indicates that the converter is for the key of a map

Returns:

the converter or UnsupportedTypeConverter if no converter is available

addInsertExpression

public void addInsertExpression(E entity,
                                InsertStatement statement)

Description copied from class: Property

Adds an expression according to the current value of the property for the given entity to an SQL insert statement.

Overrides:

addInsertExpression in class Property<E,T>

Parameters:

entity - the inspected entity

statement - the created statement

getDefaultValue

protected String getDefaultValue(AttributeAccessor attribute)

Finds the default value from the given attribute.

Parameters:

attribute - the current attribute of the property

Returns:

the default value or null if none is set

See Also:

DefaultValue.value()

getDialect

protected GeneratorDialect getDialect()

Resolves the current dialect from the context.

Returns:

the dialect of the current generation context

getExpression

public String getExpression(E entity,
                            boolean whereExpression)

Description copied from class: Property

Creates the expression for the current value of the given entity in SQL.

Overrides:

getExpression in class Property<E,T>

Parameters:

entity - the entity

whereExpression - indicates that the expression is used in a "where" statement

Returns:

the expression for the value of this property or null if no exists

getPredicate

public String getPredicate(E entity)

Description copied from class: Property

Creates an SQL predicate that references all entities that have the same value as the given entity. Used to reference entites by their (unique) properties or ids.

Overrides:

getPredicate in class Property<E,T>

Parameters:

entity - the entity

Returns:

the predicate for the value of that entity or null if no such expression is available