Class ValueReferencingControl

java.lang.Object

de.xima.fc.gui.model.value_descriptor_form.Control

de.xima.fc.gui.model.value_descriptor_form.ValueReferencingControl

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

AddListItemControl, AddMapEntryControl, AddRecordEntryControl, EditableControl, ListItemControl, MapEntryControl, RecordEntryControl

public abstract class ValueReferencingControl
extends Control

A Control that references a value via a JSON path expression.

Since:

8.5.0

See Also:

• Serialized Form

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ValueReferencingControl(String type, IValueAccessor<?> root, String path)	Creates a new value-referencing control.

Method Summary

Modifier and Type	Method	Description
protected final Object	readValue()	Reads the value referenced by the control's path expression from the root object.
protected final void	writeValue(Object value)	Writes a value to the location referenced by the control's path expression in the root object.

Methods inherited from class Control

getType

Methods inherited from class Object

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

Constructor Details

ValueReferencingControl

protected ValueReferencingControl(String type,
 IValueAccessor<?> root,
 String path)

Creates a new value-referencing control.

Parameters:

type - The type of the control that determines how it is rendered.

root - The root object against which the path is evaluated.

path - The JSON path expression that references the value.

Method Details

readValue

protected final Object readValue()

Reads the value referenced by the control's path expression from the root object.

Returns:

The referenced value, or null if the path does not resolve to a value.

writeValue

protected final void writeValue(Object value)

Writes a value to the location referenced by the control's path expression in the root object. If the path is "$", the root object itself is replaced with the new value.

Parameters:

value - The value to write.