Package io.jmix.flowui.data.value

Class BufferedContainerValueSource<E,V>

java.lang.Object

io.jmix.flowui.data.value.ContainerValueSource<E,V>

io.jmix.flowui.data.value.BufferedContainerValueSource<E,V>

Type Parameters:

E - the type of the entity in the container

V - the type of the property value

All Implemented Interfaces:

BufferedDataUnit, DataUnit, EntityDataUnit, EntityValueSource<E,V>, HasType<V>, ValueSource<V>, org.springframework.beans.factory.Aware, org.springframework.context.ApplicationContextAware

public class BufferedContainerValueSource<E,V>
extends ContainerValueSource<E,V>
implements BufferedDataUnit

Represents a value source that provides buffering capabilities for reading and writing property values.

This class is useful in scenarios where the property value changes need to be decoupled from the underlying data source, allowing intermediate updates to be managed before committing the changes.

Nested Class Summary

Nested classes/interfaces inherited from interface io.jmix.flowui.data.DataUnit

DataUnit.StateChangeEvent

Nested classes/interfaces inherited from interface io.jmix.flowui.data.EntityValueSource

EntityValueSource.InstanceChangeEvent<E>

Nested classes/interfaces inherited from interface io.jmix.flowui.data.ValueSource

ValueSource.ValueChangeEvent<V>

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	buffered
protected V	internalValue

Fields inherited from class io.jmix.flowui.data.value.ContainerValueSource

container, dataModelSecurityEnabled, events, metaPropertyPath, property, state

Constructor Summary

Constructors

Constructor	Description
BufferedContainerValueSource(InstanceContainer<E> container, String property)
BufferedContainerValueSource(InstanceContainer<E> container, String property, boolean buffered)

Method Summary

Modifier and Type	Method	Description
protected void	containerItemPropertyChanged(InstanceContainer.ItemPropertyChangeEvent<E> e)
void	discard()	Discards all changes since the last time BufferedDataUnit.write() is invoked.
V	getValue()	Returns the current value stored in the value source.
boolean	isBuffered()
boolean	isModified()
void	setApplicationContext(org.springframework.context.ApplicationContext applicationContext)
protected void	setState(BindingState state)
void	setValue(V value)	Sets the given value to this value source.
protected void	setValueInternal(V value)
void	write()	Writes all changes since the last time this method is invoked.

Methods inherited from class io.jmix.flowui.data.value.ContainerValueSource

addInstanceChangeListener, addStateChangeListener, addValueChangeListener, canUpdateMasterRefs, containerItemChanged, copyPropertyCollection, getContainer, getDataContext, getEntityMetaClass, getInverseProperty, getItem, getMetaPropertyPath, getState, getType, isCollectionPropertyType, isDataModelSecurityEnabled, isEqualCollectionValue, isReadOnly, setDataModelSecurityEnabled, updateMasterRefs

Methods inherited from class java.lang.Object

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

Field Details

buffered

protected boolean buffered

internalValue

protected V internalValue

Constructor Details

BufferedContainerValueSource

public BufferedContainerValueSource(InstanceContainer<E> container,
 String property)

BufferedContainerValueSource

public BufferedContainerValueSource(InstanceContainer<E> container,
 String property,
 boolean buffered)

Method Details

setApplicationContext

public void setApplicationContext(org.springframework.context.ApplicationContext applicationContext)

Specified by:

setApplicationContext in interface org.springframework.context.ApplicationContextAware

Overrides:

setApplicationContext in class ContainerValueSource<E,V>

containerItemPropertyChanged

protected void containerItemPropertyChanged(InstanceContainer.ItemPropertyChangeEvent<E> e)

Overrides:

containerItemPropertyChanged in class ContainerValueSource<E,V>

setState

protected void setState(BindingState state)

Overrides:

setState in class ContainerValueSource<E,V>

isBuffered

public boolean isBuffered()

Specified by:

isBuffered in interface BufferedDataUnit

Returns:

true if this data unit in buffered mode, false otherwise.

getValue

@Nullable
public V getValue()

Description copied from interface: ValueSource

Returns the current value stored in the value source.

Specified by:

getValue in interface ValueSource<E>

Overrides:

getValue in class ContainerValueSource<E,V>

Returns:

the current value, or null if no value is set

setValue

public void setValue(@Nullable
 V value)

Description copied from interface: ValueSource

Sets the given value to this value source.

Specified by:

setValue in interface ValueSource<E>

Overrides:

setValue in class ContainerValueSource<E,V>

Parameters:

value - the value to be set

setValueInternal

protected void setValueInternal(@Nullable
 V value)

write

public void write()

Description copied from interface: BufferedDataUnit

Writes all changes since the last time this method is invoked.

Specified by:

write in interface BufferedDataUnit

discard

public void discard()

Description copied from interface: BufferedDataUnit

Discards all changes since the last time BufferedDataUnit.write() is invoked.

Specified by:

discard in interface BufferedDataUnit

isModified

public boolean isModified()

Specified by:

isModified in interface BufferedDataUnit

Returns:

true if this data unit stores changed data, false otherwise.