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CloneBuilder.java
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CloneBuilder.java
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/**
* Copyright (C) 2016 Czech Technical University in Prague
* <p>
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
* <p>
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jopa.sessions;
import cz.cvut.kbss.jopa.model.descriptors.Descriptor;
import java.lang.reflect.Field;
/**
* Objects of this interface are responsible for building clones for UnitOfWork
* transactions.
*/
public interface CloneBuilder {
/**
* Builds clone of the given object.
*
* @param original Object
* @param descriptor Entity descriptor
* @return Object The clone
* @throws NullPointerException If {@code original} or {@code repository} is {@code null}
*/
Object buildClone(Object original, Descriptor descriptor);
/**
* Builds clone of the given object.
* <p>
* This method differs from {@link #buildClone(Object, cz.cvut.kbss.jopa.model.descriptors.Descriptor)} in that it
* accepts another argument which represents the owner of the built clone.
* This is useful in situations when we are cloning attributes directly, e.
* g. when lazily loading a field value.
*
* @param cloneOwner The owner of the created clone
* @param clonedField The field whose value is being cloned
* @param original The original to clone
* @param descriptor Entity descriptor
* @return The clone
* @throws NullPointerException If {@code cloneOwner}, {@code original} or {@code contextUri} is {@code null}
*/
Object buildClone(Object cloneOwner, Field clonedField, Object original,
Descriptor descriptor);
/**
* Resets the clone builder. Especially resets the visited objects cache to
* make sure all the clones are built from scratch and are not affected by
* the previously built ones.
*/
void reset();
/**
* Merges the changes on clone into the original object.
*
* @param changeSet Contains changes to merge
*/
void mergeChanges(ObjectChangeSet changeSet);
}