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MapValueMerger.java
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MapValueMerger.java
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/**
* Copyright (C) 2019 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.merge;
import cz.cvut.kbss.jopa.model.descriptors.Descriptor;
import cz.cvut.kbss.jopa.model.metamodel.FieldSpecification;
import cz.cvut.kbss.jopa.utils.CollectionFactory;
import cz.cvut.kbss.jopa.utils.EntityPropertiesUtils;
import java.util.Map;
public class MapValueMerger implements ValueMerger {
@Override
public void mergeValue(FieldSpecification<?, ?> att, Object target, Object originalValue, Object mergedValue,
Descriptor attributeDescriptor) {
final Map<?, ?> mergedMap = (Map<?, ?>) mergedValue;
// This is a simplified version which will work only for the @Properties attributes
// Bus since JOPA does not currently support any other use of Maps, it should be ok
if (mergedMap == null) {
EntityPropertiesUtils.setFieldValue(att.getJavaField(), target, null);
return;
}
final Map<Object, Object> newMap = CollectionFactory.createDefaultMap();
newMap.putAll(mergedMap);
EntityPropertiesUtils.setFieldValue(att.getJavaField(), target, newMap);
}
}