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## 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
Author:
  Andrus Adamchik
See Also:
  Serialized Form

Field Summary
`protected List` | `diffs`

Constructor Summary
`CompoundDiff()` Creates an empty CompoundDiff instance.
`CompoundDiff(List diffs)` Creates CompoundDiff instance.

Method Summary
`void` | `add(GraphDiff diff)`
`void` | `addAll(Collection diffs)`
`void` | `apply(GraphChangeHandler tracker)` Iterates over diffs list, calling "apply" on each individual diff.
`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 List diffs

Constructor Detail

### CompoundDiff

    public CompoundDiff()

  Creates an empty CompoundDiff instance.

### CompoundDiff

    public CompoundDiff(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 List getDiffs()

### add

    public void add(GraphDiff diff)

### addAll

    public void addAll(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`

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