commonj.sdo
Interface Property

All Known Implementing Classes:

SDOProperty

public interface Property

A representation of a Property in the type of a data object.

Method Summary

java.lang.Object	get(Property property) Returns the value of the specified instance property of this Property.
java.util.List	getAliasNames() Returns a list of alias names for this Property.
Type	getContainingType() Returns the containing type of this Property.
java.lang.Object	getDefault() Returns the default value this Property will have in a data object where the Property hasn't been set.
java.util.List	getInstanceProperties() Returns a read-only List of instance Properties available on this Property.
java.lang.String	getName() Returns the name of the Property.
Property	getOpposite() Returns the opposite Property if the Property is bi-directional or null otherwise.
Type	getType() Returns the type of the Property.
boolean	isContainment() Returns whether the Property is containment, i.e., whether it represents by-value composition.
boolean	isMany() Returns whether the Property is many-valued.
boolean	isNullable() Returns whether or not instances of this property can be set to null.
boolean	isOpenContent() Returns whether or not this is an open content Property.
boolean	isReadOnly() Returns true if values for this Property cannot be modified using the SDO APIs.

Method Detail

getName

java.lang.String getName()

Returns the name of the Property.

Returns:

the Property name.

getType

Type getType()

Returns the type of the Property.

Returns:

the Property type.

isMany

boolean isMany()

Returns whether the Property is many-valued.

Returns:

true if the Property is many-valued.

isContainment

boolean isContainment()

Returns whether the Property is containment, i.e., whether it represents by-value composition.

Returns:

true if the Property is containment.

getContainingType

Type getContainingType()

Returns the containing type of this Property.

Returns:

the Property's containing type.

See Also:

Type.getProperties()

getDefault

java.lang.Object getDefault()

Returns the default value this Property will have in a data object where the Property hasn't been set.

Returns:

the default value.

isReadOnly

boolean isReadOnly()

Returns true if values for this Property cannot be modified using the SDO APIs. When true, DataObject.set(Property property, Object value) throws an exception. Values may change due to other factors, such as services operating on DataObjects.

Returns:

true if values for this Property cannot be modified.

getOpposite

Property getOpposite()

Returns the opposite Property if the Property is bi-directional or null otherwise.

Returns:

the opposite Property if the Property is bi-directional or null

getAliasNames

java.util.List getAliasNames()

Returns a list of alias names for this Property.

Returns:

a list of alias names for this Property.

isNullable

boolean isNullable()

Returns whether or not instances of this property can be set to null. The effect of calling set(null) on a non-nullable property is not specified by SDO.

Returns:

true if this property is nullable.

isOpenContent

boolean isOpenContent()

Returns whether or not this is an open content Property.

Returns:

true if this property is an open content Property.

getInstanceProperties

java.util.List getInstanceProperties()

Returns a read-only List of instance Properties available on this Property.

This list includes, at a minimum, any open content properties (extensions) added to the object before defining the Property's Type. Implementations may, but are not required to in the 2.1 version of SDO, provide additional instance properties.

Returns:

the List of instance Properties on this Property.

get

java.lang.Object get(Property property)

Returns the value of the specified instance property of this Property.

Parameters:

property - one of the properties returned by getInstanceProperties().

Returns:

the value of the specified property.

See Also:

DataObject.get(Property)