de.hpi.fgis.dude.util.merger
Class AbstractMerger

java.lang.Object
  de.hpi.fgis.dude.util.merger.AbstractMerger

All Implemented Interfaces:

Merger

Direct Known Subclasses:

DefaultMerger

public abstract class AbstractMerger
extends Object
implements Merger

AbstractMerger splits the merge functionality into the merging of data, which should be implemented in subclasses and the merging of identifiers, which is done in this class.

Author:

Johannes Dyck

Constructor Summary

AbstractMerger()

Method Summary

DuDeObject	merge(DuDeObject leftElement, DuDeObject rightElement) Merges two DuDeObjects into one new DuDeObject.
protected abstract JsonRecord	mergeData(DuDeObject leftElement, DuDeObject rightElement) Creates a new data set containing the merged data from the passed DuDeObjects.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractMerger

public AbstractMerger()

Method Detail

merge

public DuDeObject merge(DuDeObject leftElement,
                        DuDeObject rightElement)

Merges two DuDeObjects into one new DuDeObject. Identifiers will be merged into an array containing all DuDeObjectIds that are part of the new object. Each identifier will only appear once in this array. The merging of the data is delegated to a subclass implementing the corresponding method.

Specified by:

merge in interface Merger

Parameters:

leftElement - One of the DuDeObjects that shall be merged.

rightElement - The other DuDeObject that shall be merged.

Returns:

A new DuDeObject created by merging the input DuDeObjects.

mergeData

protected abstract JsonRecord mergeData(DuDeObject leftElement,
                                        DuDeObject rightElement)

Creates a new data set containing the merged data from the passed DuDeObjects.

Parameters:

leftElement - One of the DuDeObjects that shall be merged.

rightElement - The other DuDeObject that shall be merged.

Returns:

The new data set built from the passed DuDeObjects.