DisplayTask.java

package sk.stuba.fiit.perconik.eclipse.swt.widgets;

import java.util.concurrent.Callable;

import javax.annotation.Nullable;

import com.google.common.base.Supplier;

public abstract class DisplayTask<V> implements Callable<V> {
  protected DisplayTask() {}

  public static final <V> DisplayTask<V> of(final Callable<V> callable) {
    return new DisplayTask<V>() {
      @Override
      public V call() throws Exception {
        return callable.call();
      }
    };
  }

  public static final <V> DisplayTask<V> of(final Runnable runnable) {
    return of(runnable, null);
  }

  public static final <V> DisplayTask<V> of(final Runnable runnable, @Nullable final V result) {
    return new DisplayTask<V>() {
      @Override
      public V call() {
        runnable.run();

        return result;
      }
    };
  }

  public static final <V> DisplayTask<V> of(final Supplier<V> supplier) {
    return new DisplayTask<V>() {
      @Override
      public V call() {
        return supplier.get();
      }
    };
  }

  public final V get(final DisplayExecutor executor) {
    return executor.submit(this).get();
  }
}