org.apache.cayenne.graph
Class CompoundDiff

java.lang.Object
  org.apache.cayenne.graph.CompoundDiff

All Implemented Interfaces:

java.io.Serializable, GraphDiff

public class CompoundDiff
extends java.lang.Object
implements GraphDiff

A GraphDiff that is a list of other GraphDiffs.

Since:

1.2

Author:

Andrus Adamchik

See Also:

Serialized Form

Field Summary

protected java.util.List

diffs

Constructor Summary

CompoundDiff()
Creates an empty CompoundDiff instance.

CompoundDiff(java.util.List diffs)
Creates CompoundDiff instance.

Method Summary

void	add(GraphDiff diff)
void	addAll(java.util.Collection diffs)
void	apply(GraphChangeHandler tracker) Iterates over diffs list, calling "apply" on each individual diff.
java.util.List	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 Detail

diffs

protected java.util.List diffs

Constructor Detail

CompoundDiff

public CompoundDiff()

Creates an empty CompoundDiff instance.

CompoundDiff

public CompoundDiff(java.util.List 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 Detail

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 java.util.List getDiffs()

add

public void add(GraphDiff diff)

addAll

public void addAll(java.util.Collection 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