org.javers.core.diff.appenders.MapChangeAppender Maven / Gradle / Ivy
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JaVers - object auditing and diff framework for Java
package org.javers.core.diff.appenders;
import org.javers.common.collections.Maps;
import org.javers.common.exception.JaversException;
import org.javers.core.diff.NodePair;
import org.javers.core.diff.changetype.map.*;
import org.javers.core.metamodel.type.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import static org.javers.common.exception.JaversExceptionCode.VALUE_OBJECT_IS_NOT_SUPPORTED_AS_MAP_KEY;
import static org.javers.core.diff.appenders.CorePropertyChangeAppender.renderNotParametrizedWarningIfNeeded;
/**
* @author bartosz walacik
*/
class MapChangeAppender implements PropertyChangeAppender {
@Override
public boolean supports(JaversType propertyType) {
if (!(propertyType instanceof MapType)){
return false;
}
MapType mapType = (MapType)propertyType;
if (mapType.getKeyJaversType() instanceof ValueObjectType){
throw new JaversException(VALUE_OBJECT_IS_NOT_SUPPORTED_AS_MAP_KEY, propertyType);
}
return true;
}
@Override
public MapChange calculateChanges(NodePair pair, JaversProperty property) {
MapType mapType = property.getType();
Map left = wrapKeysIfNeeded((Map) pair.getLeftDehydratedPropertyValueAndSanitize(property), mapType.getKeyJaversType());
Map right = wrapKeysIfNeeded((Map) pair.getRightDehydratedPropertyValueAndSanitize(property), mapType.getKeyJaversType());
List changes = calculateEntryChanges(left, right, mapType.getValueJaversType());
if (!changes.isEmpty()){
renderNotParametrizedWarningIfNeeded(mapType.getKeyJavaType(), "key", "Map", property);
renderNotParametrizedWarningIfNeeded(mapType.getValueJavaType(), "value", "Map", property);
return new MapChange(pair.createPropertyChangeMetadata(property), changes,
(Map)pair.getLeftPropertyValueAndSanitize(property),
(Map)pair.getRightPropertyValueAndSanitize(property));
}
else {
return null;
}
}
private Map wrapKeysIfNeeded(Map map, JaversType mapKeyType) {
return HashWrapper.wrapKeysIfNeeded(map, mapKeyType);
}
/**
* @return never returns null
*/
List calculateEntryChanges(Map leftMap, Map rightMap, JaversType mapValueType) {
List changes = new ArrayList<>();
for (Object commonKey : Maps.commonKeys(leftMap, rightMap)) {
Object leftVal = leftMap.get(commonKey);
Object rightVal = rightMap.get(commonKey);
if (!mapValueType.equals(leftVal, rightVal)){
changes.add( new EntryValueChange(commonKey, leftVal, rightVal));
}
}
for (Object addedKey : Maps.keysDifference(rightMap, leftMap)) {
Object addedValue = rightMap.get(addedKey);
changes.add( new EntryAdded(addedKey, addedValue));
}
for (Object removedKey : Maps.keysDifference(leftMap, rightMap)) {
Object removedValue = leftMap.get(removedKey);
changes.add( new EntryRemoved(removedKey, removedValue));
}
return changes;
}
}