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ChangeDetectors.java
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ChangeDetectors.java
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/**
* Copyright (C) 2016 Czech Technical University in Prague
*
* 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.
*
* 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.change;
import cz.cvut.kbss.jopa.sessions.MetamodelProvider;
import java.util.Collection;
import java.util.Map;
class ChangeDetectors implements ChangeDetector {
private final MetamodelProvider metamodelProvider;
private final ChangeDetector mapChangeDetector;
private final ChangeDetector collectionChangeDetector;
private final ChangeDetector managedTypeDector;
ChangeDetectors(MetamodelProvider metamodelProvider) {
this.metamodelProvider = metamodelProvider;
this.mapChangeDetector = new MapChangeDetector(this);
this.collectionChangeDetector = new CollectionChangeDetector(this, metamodelProvider);
this.managedTypeDector = new ManagedTypeChangeDetector(metamodelProvider);
}
@Override
public boolean hasChanges(Object clone, Object original) {
if ((clone == null && original != null) || (clone != null && original == null)) {
return true;
}
if (clone == null) {
return false;
}
if (metamodelProvider.isEntityType(clone.getClass())) {
return managedTypeDector.hasChanges(clone, original);
} else if (clone instanceof Collection) {
return collectionChangeDetector.hasChanges(clone, original);
} else if (clone instanceof Map) {
return mapChangeDetector.hasChanges(clone, original);
}
return !clone.equals(original);
}
}