DelegateFinder.java

package games.strategy.triplea.delegate;

import games.strategy.engine.data.GameData;
import games.strategy.engine.delegate.IDelegate;

public class DelegateFinder {
  private static IDelegate findDelegate(final GameData data, final String delegate_name) {
    final IDelegate delegate = data.getDelegateList().getDelegate(delegate_name);
    if (delegate == null) {
      throw new IllegalStateException(delegate_name + " delegate not found");
    }
    return delegate;
  }

  public static final PoliticsDelegate politicsDelegate(final GameData data) {
    return (PoliticsDelegate) findDelegate(data, "politics");
  }

  public static final BattleDelegate battleDelegate(final GameData data) {
    return (BattleDelegate) findDelegate(data, "battle");
  }

  public static final AbstractMoveDelegate moveDelegate(final GameData data) {
    return (AbstractMoveDelegate) findDelegate(data, "move");
  }

  public static final TechnologyDelegate techDelegate(final GameData data) {
    return (TechnologyDelegate) findDelegate(data, "tech");
  }
}