Package org.geotools.feature.type

Class AbstractLazyAttributeTypeImpl

Object

AbstractLazyAttributeTypeImpl

All Implemented Interfaces:

AttributeType, PropertyType

Direct Known Subclasses:

AbstractLazyComplexTypeImpl

public abstract class AbstractLazyAttributeTypeImpl
extends Object
implements AttributeType

A replacement for AttributeTypeImpl with lazy evaluation of super type, so types can be defined in any order. Note that type equality is defined by name, so do not allow different types with the same name to be put in any Collection.

Inspired by AttributeTypeImpl and PropertyTypeImpl.

Author:

Ben Caradoc-Davies (CSIRO Earth Science and Resource Engineering)

See Also:

AttributeTypeImpl, PropertyTypeImpl

Constructor Summary

Constructors

Constructor	Description
AbstractLazyAttributeTypeImpl(Name name, Class<?> binding, boolean identified, boolean isAbstract, List<Filter> restrictions, InternationalString description)	Constructor arguments have the same meaning as in AttributeTypeImpl.

Method Summary

Modifier and Type	Method	Description
abstract AttributeType	buildSuper()	Subclasses must override this method to return the super type of this type or null if none.
boolean	equals(Object other)	Equality by name.
Class<?>	getBinding()	The java class that values of properties of the property type are bound to.
InternationalString	getDescription()	Human readable description of this property type.
Name	getName()	The name of the property type.
List<Filter>	getRestrictions()	List of restrictions used define valid values for properties of this property type.
AttributeType	getSuper()	Override of PropertyType.getSuper() which type narrows to AttributeType.
Map<Object,Object>	getUserData()	A map of "user data" which enables applications to store "application-specific" information against a property type.
int	hashCode()	Hashcode override based on PropertyType.getName().
boolean	isAbstract()	Flag indicating if the type is abstract or not.
boolean	isIdentified()	Indicates if the type is identified or not.
String	toString()

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

AbstractLazyAttributeTypeImpl

public AbstractLazyAttributeTypeImpl(Name name,
                                     Class<?> binding,
                                     boolean identified,
                                     boolean isAbstract,
                                     List<Filter> restrictions,
                                     InternationalString description)

Constructor arguments have the same meaning as in AttributeTypeImpl.

Method Detail

buildSuper

public abstract AttributeType buildSuper()

Subclasses must override this method to return the super type of this type or null if none. This method will only be called once at most.

Returns:

super type or null

isIdentified

public boolean isIdentified()

Description copied from interface: AttributeType

Indicates if the type is identified or not.

If this method returns true, then the corresponding attribute must have a unique identifier, ie, Attribute.getIdentifier() must return a value, and cannot be null.

Specified by:

isIdentified in interface AttributeType

Returns:

true if the attribute is identified, otherwise false.

See Also:

AttributeType.isIdentified()

getSuper

public AttributeType getSuper()

Description copied from interface: AttributeType

Override of PropertyType.getSuper() which type narrows to AttributeType.

Specified by:

getSuper in interface AttributeType

Specified by:

getSuper in interface PropertyType

Returns:

The parent or super type, or null.

See Also:

AttributeType.getSuper()

getName

public Name getName()

Description copied from interface: PropertyType

The name of the property type.

Note that this is not the same name as Property.getName(), which is the name of the instance of the type, not the type itself.

The returned name is a qualified name made up of two parts. The first a namespace uri (Name.getNamespaceURI(), and the second a local part (Name.getLocalPart().

This value is never null.

Specified by:

getName in interface PropertyType

Returns:

The name of the property type.

See Also:

PropertyType.getName()

getBinding

public Class<?> getBinding()

Description copied from interface: PropertyType

The java class that values of properties of the property type are bound to.

This value is never null.

Specified by:

getBinding in interface PropertyType

Returns:

The binding of the property type.

See Also:

PropertyType.getBinding()

isAbstract

public boolean isAbstract()

Description copied from interface: PropertyType

Flag indicating if the type is abstract or not.

Specified by:

isAbstract in interface PropertyType

Returns:

true if the type is abstract, otherwise false.

See Also:

PropertyType.isAbstract()

getRestrictions

public List<Filter> getRestrictions()

Description copied from interface: PropertyType

List of restrictions used define valid values for properties of this property type.

Each restriction is a Filter object in which the property is passed through. If Filter.evaluate(Object) returns true the restriction is met. If false is returned then the restriction has not been met and the property should be considered invalid. Remember to check getSuper().getRestrictions() as well.

This method returns an empty set in the case of no restrictions and should not return null.

Specified by:

getRestrictions in interface PropertyType

Returns:

List used to validate allowable values.

See Also:

PropertyType.getRestrictions()

getDescription

public InternationalString getDescription()

Description copied from interface: PropertyType

Human readable description of this property type.

Specified by:

getDescription in interface PropertyType

Returns:

Human readable description of this property type.

See Also:

PropertyType.getDescription()

getUserData

public Map<Object,Object> getUserData()

Description copied from interface: PropertyType

A map of "user data" which enables applications to store "application-specific" information against a property type.

As an example, consider an application that builds a PropertyType from an xml schema. A useful bit of information to attach to the PropertyType is the original schema itself, in whatever construct it might be stored in:

 
 XSDComplexTypeDefinition complexTypeDef = ...;
 PropertyType type = buildPropertyType( complexTypeDef );

 type.getUserData().put( XSDComplexTypeDefintion.class, complexTypeDef );
 
 

Specified by:

getUserData in interface PropertyType

Returns:

A map of user data.

See Also:

PropertyType.getUserData()

equals

public boolean equals(Object other)

Equality by name. Yes, this may be a surprise to some client code, but how else do you define equality in the face of cyclic type definitions, without breaking encapsulation to analyse the full graph of types?

Specified by:

equals in interface PropertyType

Overrides:

equals in class Object

Returns:

true if other is a PropertyType with the same name

See Also:

Object.equals(java.lang.Object)

hashCode

public int hashCode()

Description copied from interface: PropertyType

Hashcode override based on PropertyType.getName().

Specified by:

hashCode in interface PropertyType

Overrides:

hashCode in class Object

Returns:

getName().hashCode()

See Also:

Object.hashCode()

toString

public String toString()

Overrides:

toString in class Object

See Also:

Object.toString()