Package org.apache.cayenne.graph

Class CompoundDiff

java.lang.Object

org.apache.cayenne.graph.CompoundDiff

All Implemented Interfaces:

Serializable, GraphDiff

public class CompoundDiff
extends Object
implements GraphDiff

A GraphDiff that is a list of other GraphDiffs.

Since:

1.2

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected List<GraphDiff>	diffs

Constructor Summary

Constructors

Constructor	Description
CompoundDiff()	Creates an empty CompoundDiff instance.
CompoundDiff(List<GraphDiff> diffs)	Creates CompoundDiff instance.

Method Summary

Modifier and Type	Method	Description
void	add(GraphDiff diff)
void	addAll(Collection<? extends GraphDiff> diffs)
void	apply(GraphChangeHandler tracker)	Iterates over diffs list, calling "apply" on each individual diff.
List<GraphDiff>	getDiffs()
boolean	isNoop()	Returns true if this diff has no other diffs or if all of its diffs are noops.
void	undo(GraphChangeHandler tracker)	Iterates over diffs list in reverse order, calling "apply" on each individual diff.

Methods inherited from class java.lang.Object

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

Field Details

diffs

protected List<GraphDiff> diffs

Constructor Details

CompoundDiff

public CompoundDiff()

Creates an empty CompoundDiff instance.

CompoundDiff

public CompoundDiff(List<GraphDiff> diffs)

Creates CompoundDiff instance. Note that a List is not cloned in this constructor, so subsequent calls to add and addAll would modify the original list.

Method Details

isNoop

public boolean isNoop()

Returns true if this diff has no other diffs or if all of its diffs are noops.

Specified by:

isNoop in interface GraphDiff

getDiffs

public List<GraphDiff> getDiffs()

add

public void add(GraphDiff diff)

addAll

public void addAll(Collection<? extends GraphDiff> diffs)

apply

public void apply(GraphChangeHandler tracker)

Iterates over diffs list, calling "apply" on each individual diff.

Specified by:

apply in interface GraphDiff

undo

public void undo(GraphChangeHandler tracker)

Iterates over diffs list in reverse order, calling "apply" on each individual diff.

Specified by:

undo in interface GraphDiff