/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j 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 org.neo4j.index.internal.gbptree;

class TrackingValueMerger<K, V> implements ValueMerger<K, V> {
    private final ValueMerger<K, V> actual;
    private boolean merged;

    TrackingValueMerger(ValueMerger<K, V> actual) {
        this.actual = actual;
    }

    @Override
    public MergeResult merge(K existingKey, K newKey, V existingValue, V newValue) {
        merged = true;
        return actual.merge(existingKey, newKey, existingValue, newValue);
    }

    boolean wasMerged() {
        return merged;
    }
}
