org.apache.tapestry.ioc.services
Interface PropertyAdapter

All Superinterfaces:

AnnotationProvider

All Known Implementing Classes:

PropertyAdapterImpl

public interface PropertyAdapter
extends AnnotationProvider

Provides access to a single property within a class. Acts as an AnnotationProvider; when searching for annotations, the read method (if present) is checked first, followed by the write method.

See Also:

ClassPropertyAdapter

Method Summary

Object	get(Object instance) Reads the property value.
String	getName() Returns the name of the property.
Method	getReadMethod() Returns the method used to read the property, or null if the property is not readable.
Class	getType() Returns the type of the property.
Method	getWriteMethod() Returns the method used to update the property, or null if the property is not writeable.
boolean	isCastRequired() Returns true if the return type of the read method is not the same as the property type.
boolean	isRead() Returns true if the property is readable (i.e., has a getter method).
boolean	isUpdate() Returns true if the property is writeable (i.e., has a setter method).
void	set(Object instance, Object value) Updates the property value.

Methods inherited from interface org.apache.tapestry.ioc.AnnotationProvider

getAnnotation

Method Detail

getName

String getName()

Returns the name of the property.

isRead

boolean isRead()

Returns true if the property is readable (i.e., has a getter method).

getReadMethod

Method getReadMethod()

Returns the method used to read the property, or null if the property is not readable.

isUpdate

boolean isUpdate()

Returns true if the property is writeable (i.e., has a setter method).

getWriteMethod

Method getWriteMethod()

Returns the method used to update the property, or null if the property is not writeable.

get

Object get(Object instance)

Reads the property value.

Parameters:

instance - to read from

Throws:

UnsupportedOperationException - if the property is write only

set

void set(Object instance,
         Object value)

Updates the property value. The provided value must not be null if the property type is primitive, and must otherwise be of the proper type.

Parameters:

instance - to update

value - new value for the property

Throws:

UnsupportedOperationException - if the property is read only

getType

Class getType()

Returns the type of the property.

isCastRequired

boolean isCastRequired()

Returns true if the return type of the read method is not the same as the property type. This can occur when the property has been defined using generics, in which case, the method's type may be Object when the property type is something more specific. This method is primarily used when generating runtime code related to the property.