Package io.permazen.change

Class ListFieldRemove<T,E>

java.lang.Object

io.permazen.change.Change<T>

io.permazen.change.FieldChange<T>

io.permazen.change.ListFieldChange<T>

io.permazen.change.ListFieldRemove<T,E>

Type Parameters:

T - the type of the object containing the changed field

E - the type of the changed list's elements

public class ListFieldRemove<T,E>
extends ListFieldChange<T>

Notification object that gets passed to @OnChange-annotated methods when an element is removed from a list field.

Constructor Summary

Constructors

Constructor	Description
ListFieldRemove(T jobj, String fieldName, int index, E element)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	apply(PermazenTransaction jtx, PermazenObject jobj)	Apply this change to the given object in the given transaction.
boolean	equals(Object obj)
E	getElement()	Get the element that was removed from the list.
int	getIndex()	Get the list index from which the element was removed.
int	hashCode()
String	toString()
<R> R	visit(ChangeSwitch<R> target)	Apply visitor pattern.

Methods inherited from class io.permazen.change.FieldChange

getFieldName

Methods inherited from class io.permazen.change.Change

apply, apply, apply, getObject, getPermazenObject

Methods inherited from class java.lang.Object

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

Constructor Details

ListFieldRemove

public ListFieldRemove(T jobj,
 String fieldName,
 int index,
 E element)

Constructor.

Parameters:

jobj - Java object containing the list field that changed

fieldName - the name of the field that changed

index - index at which the removal occurred

element - the element that was removed

Throws:

IllegalArgumentException - if jobj or fieldName is null

Method Details

visit

public <R> R visit(ChangeSwitch<R> target)

Description copied from class: Change

Apply visitor pattern. Invokes the method of target corresponding to this instance's type.

Specified by:

visit in class Change<T>

Type Parameters:

R - visitor return type

Parameters:

target - visitor pattern target

Returns:

value returned by the selected method of target

apply

public void apply(PermazenTransaction jtx,
 PermazenObject jobj)

Description copied from class: Change

Apply this change to the given object in the given transaction.

Specified by:

apply in class Change<T>

Parameters:

jtx - the transaction in which to apply this change

jobj - the target object to which to apply this change

getIndex

public int getIndex()

Get the list index from which the element was removed.

Returns:

the index at which the value was removed

getElement

public E getElement()

Get the element that was removed from the list.

Returns:

the value removed from the list

equals

public boolean equals(Object obj)

Overrides:

equals in class FieldChange<T>

hashCode

public int hashCode()

Overrides:

hashCode in class FieldChange<T>

toString

public String toString()

Overrides:

toString in class Object