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/*
 * This file is part of WebLookAndFeel library.
 *
 * WebLookAndFeel library 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.
 *
 * WebLookAndFeel library 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 WebLookAndFeel library.  If not, see .
 */

package com.alee.api.merge.nullresolver;

import com.alee.api.annotations.NotNull;
import com.alee.api.annotations.Nullable;
import com.alee.api.merge.Merge;
import com.alee.api.merge.NullResolver;
import com.alee.api.merge.RecursiveMerge;

/**
 * {@link NullResolver} that overwrites base object only if merged object is not {@code null}.
 *
 * @author Mikle Garin
 * @see How to use Merge
 * @see Merge
 */
public final class SkippingNullResolver implements NullResolver
{
    @Nullable
    @Override
    public Object resolve ( @NotNull final RecursiveMerge merge, @Nullable final Object object, @Nullable final Object merged )
    {
        return merged != null ? merged : object;
    }
}