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/**
* <copyright>
*
* Service Data Objects
* Version 2.1.0
* Licensed Materials
*
* (c) Copyright BEA Systems, Inc., International Business Machines Corporation,
* Oracle Corporation, Primeton Technologies Ltd., Rogue Wave Software, SAP AG.,
* Software AG., Sun Microsystems, Sybase Inc., Xcalia, Zend Technologies,
* 2005, 2006. All rights reserved.
*
* </copyright>
*
*/
package commonj.sdo.helper;
import commonj.sdo.DataObject;
import commonj.sdo.impl.HelperProvider;
/**
* A helper for copying DataObjects.
*/
public interface CopyHelper
{
/**
* Create a shallow copy of the DataObject dataObject:
* Creates a new DataObject copiedDataObject with the same values
* as the source dataObject for each property where
* property.getType().isDataType() is true.
* The value of such a Property property in copiedDataObject is:
* dataObject.get(property) for single-valued Properties
* (copiedDataObject.get(property) equals() dataObject.get(property)), or
* a List where each member is equal to the member at the
* same index in dataObject for multi-valued Properties
* copiedDataObject.getList(property).get(i) equals() dataObject.getList(property).get(i)
* The copied Object is unset for each Property where
* property.getType().isDataType() is false
* since they are not copied.
* Read-only properties are copied.
* A copied object shares metadata with the source object
* sourceDO.getType() == copiedDO.getType()
* If a ChangeSummary is part of the source DataObject
* the copy has a new, empty ChangeSummary.
* Logging state is the same as the source ChangeSummary.
*
* @param dataObject to be copied
* @return copy of dataObject
*/
DataObject copyShallow(DataObject dataObject);
/**
* Create a deep copy of the DataObject tree:
* Copies the dataObject and all its {@link commonj.sdo.Property#isContainment() contained}
* DataObjects recursively.
* Values of Properties are copied as in shallow copy,
* and values of Properties where
* property.getType().isDataType() is false
* are copied where each value copied must be a
* DataObject contained by the source dataObject.
* If a DataObject is outside the DataObject tree and the
* property is bidirectional, then the DataObject is skipped.
* If a DataObject is outside the DataObject tree and the
* property is unidirectional, then the same DataObject is referenced.
* Read-only properties are copied.
* If any DataObject referenced is not in the containment
* tree an IllegalArgumentException is thrown.
* If a ChangeSummary is part of the copy tree the new
* ChangeSummary refers to objects in the new DataObject tree.
* Logging state is the same as the source ChangeSummary.
*
* @param dataObject to be copied.
* @return copy of dataObject
* @throws IllegalArgumentException if any referenced DataObject
* is not part of the containment tree.
*/
DataObject copy(DataObject dataObject);
/**
* The default CopyHelper.
*/
CopyHelper INSTANCE = HelperProvider.getCopyHelper();
}
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