com.vaadin.ui.declarative

Class FieldBinder

java.lang.Object

com.vaadin.ui.declarative.FieldBinder

All Implemented Interfaces:

Serializable

public class FieldBinder
extends Object
implements Serializable

Binder utility that binds member fields of a design class instance to given component instances. Only fields of type Component are bound

Since:

7.4

Author:

Vaadin Ltd

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
FieldBinder(Object design) Creates a new instance of LayoutFieldBinder.
FieldBinder(Object design, Class<?> classWithFields) Creates a new instance of LayoutFieldBinder.

Method Summary

Modifier and Type	Method and Description
boolean	bindField(Component instance) Tries to bind the given Component instance to a member field of the bind target.
boolean	bindField(Component instance, String localId) Tries to bind the given Component instance to a member field of the bind target.
protected static List<Field>	getFields(Class<?> searchClass) Returns a list containing Field objects reflecting all the fields of the class or interface represented by this Class object.
Collection<String>	getUnboundFields() Returns a collection of field names that are not bound.

Methods inherited from class java.lang.Object

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

Constructor Detail

FieldBinder

public FieldBinder(Object design)
            throws IntrospectionException

Creates a new instance of LayoutFieldBinder.

Parameters:

design - the design class instance containing the fields to bind

Throws:

IntrospectionException - if the given design class can not be introspected

FieldBinder

public FieldBinder(Object design,
                   Class<?> classWithFields)
            throws IntrospectionException

Creates a new instance of LayoutFieldBinder.

Parameters:

design - the instance containing the fields

classWithFields - the class which defines the fields to bind

Throws:

IntrospectionException - if the given design class can not be introspected

Method Detail

getUnboundFields

public Collection<String> getUnboundFields()
                                    throws FieldBindingException

Returns a collection of field names that are not bound.

Returns:

a collection of fields assignable to Component that are not bound

Throws:

FieldBindingException

bindField

public boolean bindField(Component instance)

Tries to bind the given Component instance to a member field of the bind target. The name of the bound field is constructed based on the id or caption of the instance, depending on which one is defined. If a field is already bound (not null), FieldBindingException is thrown.

Parameters:

instance - the instance to be bound to a field

Returns:

true on success, otherwise false

Throws:

FieldBindingException - if error occurs when trying to bind the instance to a field

bindField

public boolean bindField(Component instance,
                         String localId)

Tries to bind the given Component instance to a member field of the bind target. The fields are matched based on localId, id and caption.

Parameters:

instance - the instance to be bound to a field

localId - the localId used for mapping the field to an instance field

Returns:

true on success

Throws:

FieldBindingException - if error occurs when trying to bind the instance to a field

getFields

protected static List<Field> getFields(Class<?> searchClass)

Returns a list containing Field objects reflecting all the fields of the class or interface represented by this Class object. The fields in superclasses are excluded.

Parameters:

searchClass - the class to be scanned for fields

Returns:

the list of fields in this class