com.simiacryptus.mindseye.art.photo.topology.IteratedRasterTopology Maven / Gradle / Ivy

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/*
 * Copyright (c) 2019 by Andrew Charneski.
 *
 * The author licenses this file to you 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 com.simiacryptus.mindseye.art.photo.topology;

import com.simiacryptus.ref.lang.ReferenceCountingBase;

import javax.annotation.Nonnull;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

public class IteratedRasterTopology extends ReferenceCountingBase implements RasterTopology {
  private final RasterTopology inner;
  private int iterations = 2;

  public IteratedRasterTopology(RasterTopology inner) {
    this.inner = inner;
    this.setIterations(getIterations());
  }

  @Override
  public int[] getDimensions() {
    return inner.getDimensions();
  }

  public int getIterations() {
    return iterations;
  }

  public void setIterations(int iterations) {
    this.iterations = iterations;
  }

  public static List iterate(List edges, int pow) {
    assert pow > 0;
    if (1 == pow) {
      return edges;
    } else {
      final List prev = iterate(edges, pow - 1);
      return IntStream
          .range(0, prev.size()).parallel().mapToObj(j -> Arrays.stream(prev.get(j))
              .flatMap(i -> Arrays.stream(prev.get(i))).filter(i -> i != j).distinct().toArray())
          .collect(Collectors.toList());
    }
  }

  @Override
  public List connectivity() {
    return iterate(inner.connectivity(), getIterations());
  }

  @Override
  public int getIndexFromCoords(int x, int y) {
    return inner.getIndexFromCoords(x, y);
  }

  @Override
  public int[] getCoordsFromIndex(int i) {
    return inner.getCoordsFromIndex(i);
  }

  @Override
  public IteratedRasterTopology addRef() {
    return (IteratedRasterTopology) super.addRef();
  }

  @Override
  protected void _free() {
    super._free();
    inner.freeRef();
  }
}