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## org.springframework.beans
Interface Mergeable

All Known Implementing Classes:
  ManagedArray, ManagedList, ManagedMap, ManagedProperties, ManagedSet

    public interface Mergeable

Interface representing an object whose value set can be merged with that of a parent object.

Since:
  2.0
Author:
  Rob Harrop
See Also:
  `ManagedSet`, `ManagedList`, `ManagedMap`, `ManagedProperties`

Method Summary
`boolean` | `isMergeEnabled()` Is merging enabled for this particular instance?
`java.lang.Object` | `merge(java.lang.Object parent)` Merge the current value set with that of the supplied object.

Method Detail

### isMergeEnabled

    boolean isMergeEnabled()

  Is merging enabled for this particular instance?

### merge

    java.lang.Object merge(java.lang.Object parent)

  Merge the current value set with that of the supplied object.

  The supplied object is considered the parent, and values in the callee's value set must override those of the supplied object.

  Parameters:
    `parent` - the object to merge with
  Returns:
    the result of the merge operation
  Throws:
    `java.lang.IllegalArgumentException` - if the supplied parent is `null`
    `java.lang.IllegalStateException` - if merging is not enabled for this instance (i.e. `mergeEnabled` equals `false`).

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