Class DefaultProjectMerger

java.lang.Object

org.apache.cayenne.project.DefaultProjectMerger

All Implemented Interfaces:

ProjectMerger

public class DefaultProjectMerger
extends Object
implements ProjectMerger

A default implementation of ProjectMerger. The general rule of merge is that the order of descriptors on the merge list matters. If there are two conflicting metadata objects belonging to two descriptors, an object from the last project takes precedence over the object from the first one. This way it is easy to override pieces of metadata. This is also similar to how DI modules are merged in Cayenne. So this is how the merge works:

• Merged project name is the same as the name of the last project on the merge list.
• Merged project settings are the same as the settings of the last project on the merge list. I.e. settings are not merged to avoid invalid combinations and unexpected runtime behavior.
• If there are two or more DataMaps with the same name, only one DataMap is placed in the merged project, the rest are discarded. DataMap with highest index in the project array is chosen per precedence rule above.
• If there are two or more DataNodes with the same name, only one DataNodes is placed in the merged project, the rest are discarded. DataNodes with highest index in the project array is chosen per precedence rule above.

Since:

3.1

Constructor Summary

Constructors

Constructor	Description
DefaultProjectMerger()

Method Summary

Modifier and Type	Method	Description
Project	merge(Project... projects)

Methods inherited from class Object

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

Constructor Details

DefaultProjectMerger

public DefaultProjectMerger()

Method Details

merge

public Project merge(Project... projects)

Specified by:

merge in interface ProjectMerger