MazeComponents.java

/*
 * Copyright 2015 Lukas Tenbrink
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package ivorius.ivtoolkit.maze.components;

import com.google.common.base.Function;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.Iterables;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import ivorius.ivtoolkit.maze.MazeRoom;

import javax.annotation.Nullable;
import java.util.Map;
import java.util.Set;

/**
 * Created by lukas on 15.04.15.
 */
public class MazeComponents
{
    public static <T> MazeComponent<T> shift(final MazeComponent<T> component, final MazeRoom shift)
    {
        return new SetMazeComponent<>(FluentIterable.from(component.rooms()).transform(new Function<MazeRoom, MazeRoom>()
        {
            @Nullable
            @Override
            public MazeRoom apply(MazeRoom input)
            {
                return input != null ? input.add(shift) : null;
            }
        }).toSet(), FluentIterable.from(component.exits().keySet()).transform(new Function<MazeRoomConnection, MazeRoomConnection>()
        {
            @Nullable
            @Override
            public MazeRoomConnection apply(@Nullable MazeRoomConnection input)
            {
                return input != null ? input.add(shift) : null;
            }
        }).toMap(new Function<MazeRoomConnection, T>()
        {
            @Nullable
            @Override
            public T apply(@Nullable MazeRoomConnection input)
            {
                return component.exits().get(input);
            }
        }));
    }
}