Android Open Source - android-plotter List Pool

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From Project

Back to project page android-plotter.

License

The source code is released under:

Apache License

Java Source Code

package org.solovyev.android.plotter.meshes;
//from   w ww  .  ja v a  2  s.c  o  m
import javax.annotation.Nonnull;
import java.util.ArrayList;
import java.util.List;

public final class ListPool<M extends Mesh> implements Pool<M> {

  public ListPool(@Nonnull Callback<M> callback) {
    this.callback = callback;
  }

  @Nonnull
  private final List<M> list = new ArrayList<M>();

  @Nonnull
  private final Callback<M> callback;

  @Nonnull
  @Override
  public M obtain() {
    final int poolSize = list.size();
    final M mesh;
    if (poolSize > 0) {
      mesh = list.remove(poolSize - 1);
    } else {
      mesh = callback.create();
    }
    return mesh;
  }

  @Override
  public void release(@Nonnull M mesh) {
    callback.release(mesh);
    list.add(mesh);
  }

  @Override
  public void clear() {
    while (!list.isEmpty()) {
      callback.release(list.remove(list.size() - 1));
    }
  }

  public static interface Callback<M extends Mesh> {
    @Nonnull
    M create();
    void release(@Nonnull M mesh);
  }
}

Java Source Code List

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