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MapChangeDetector.java
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MapChangeDetector.java
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/**
* Copyright (C) 2022 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 java.util.Iterator;
import java.util.Map;
class MapChangeDetector implements ChangeDetector {
private final ChangeDetector changeDetector;
MapChangeDetector(ChangeDetector changeDetector) {
this.changeDetector = changeDetector;
}
@Override
public boolean hasChanges(Object clone, Object original) {
assert clone != null;
assert original != null;
final Map<?, ?> cl = (Map<?, ?>) clone;
final Map<?, ?> orig = (Map<?, ?>) original;
if (orig.size() != cl.size()) {
return true;
}
boolean changes = false;
final Iterator<?> it = orig.keySet().iterator();
while (it.hasNext() && !changes) {
final Object origKey = it.next();
if (!cl.containsKey(origKey)) {
return true;
}
final Object origVal = orig.get(origKey);
Object clVal = cl.get(origKey);
changes = changeDetector.hasChanges(origVal, clVal);
}
return changes;
}
}