org.eclipse.emf.cdo.compare
Class CDOCompareUtil

java.lang.Object
  org.eclipse.emf.cdo.compare.CDOCompareUtil

public final class CDOCompareUtil

extends Object

Provides static factory methods that return CDO-scoped comparisons.

Two different scopes are supported:

• CDOComparisonScope.AllContents takes an arbitrary object (including resource nodes) and returns matches for all elements of its content tree. This scope has the advantage that the comparison can be rooted at specific objects that are different from (below of) the root resource. The disadvantage is that all the transitive children of this specific object are matched, whether they differ or not. Major parts of huge repositories can be loaded to the client side easily, if no attention is paid. The following method returns comparisons that are based on this scope algorithm:
  • compare(CDOObject, CDOView, CDOView[])
• CDOComparisonScope.Minimal takes a view/transaction and returns matches only for the changed elements of the entire content tree of its root resource. The advantage of this scope is that CDO-specific mechanisms are used to efficiently (remotely) determine the set of changed objects. Only those and their container objects are considered as matches, making this scope scale seamlessly with the overall size of a repository. The following method returns comparisons that are based on this scope algorithm:
  • compare(CDOView, CDOView, CDOView[])

The matcher used by the comparisons is based on an ID function that considers the CDOIDs of the objects. Resources and folders are treated as normal EObjects.

compare

public static Comparison compare(IComparisonScope scope)

compare

public static Comparison compare(CDOObject left,
                                 CDOView rightView,
                                 CDOView[] originView)

Takes an arbitrary object (including resource nodes) and returns matches for all elements of its content tree. This scope has the advantage that the comparison can be rooted at specific objects that are different from (below of) the root resource. The disadvantage is that all the transitive children of this specific object are matched, whether they differ or not. Major parts of huge repositories can be loaded to the client side easily, if no attention is paid.

compare

public static Comparison compare(CDOView leftView,
                                 CDOView rightView,
                                 CDOView[] originView)

Takes a view/transaction and returns matches only for the changed elements of the entire content tree of its root resource. The advantage of this scope is that CDO-specific mechanisms are used to efficiently (remotely) determine the set of changed objects. Only those and their container objects are considered as matches, making this scope scale seamlessly with the overall size of a repository.

compare

public static Comparison compare(CDOView leftView,
                                 CDOView rightView,
                                 CDOView[] originView,
                                 Set<CDOID> ids)

compareUncommittedChanges

public static Comparison compareUncommittedChanges(CDOTransaction transaction)