Interface AstObserver

All Known Implementing Classes:

AstObserverAdapter, LexicalPreservingPrinter.Observer, PropagatingAstObserver

public interface AstObserver

An Observer for an AST element (either a Node or a NodeList).

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static enum	AstObserver.ListChangeType	Type of change occurring on a List

Method Summary

Modifier and Type	Method	Description
void	listChange(NodeList<?> observedNode, AstObserver.ListChangeType type, int index, Node nodeAddedOrRemoved)	A list is changed
void	listReplacement(NodeList<?> observedNode, int index, Node oldNode, Node newNode)
void	parentChange(Node observedNode, Node previousParent, Node newParent)	The parent of a node is changed
void	propertyChange(Node observedNode, ObservableProperty property, Object oldValue, Object newValue)	The value of a property is changed

Method Details

propertyChange

void propertyChange(Node observedNode,
 ObservableProperty property,
 Object oldValue,
 Object newValue)

The value of a property is changed

Parameters:

observedNode - owner of the property

property - property changed

oldValue - value of the property before the change

newValue - value of the property after the change

parentChange

void parentChange(Node observedNode,
 Node previousParent,
 Node newParent)

The parent of a node is changed

Parameters:

observedNode - node of which the parent is changed

previousParent - previous parent

newParent - new parent

listChange

void listChange(NodeList<?> observedNode,
 AstObserver.ListChangeType type,
 int index,
 Node nodeAddedOrRemoved)

A list is changed

Parameters:

observedNode - list changed

type - type of change

index - position at which the changed occurred

nodeAddedOrRemoved - element added or removed

listReplacement

void listReplacement(NodeList<?> observedNode,
 int index,
 Node oldNode,
 Node newNode)