AbstractOpponentPartyCardStrategy.java

/**
 * Copyright (C) 2017 Jan Schäfer (jansch@users.sourceforge.net)
 *
 * 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 org.jskat.ai.nn.input;

import java.util.HashSet;
import java.util.Set;

import org.jskat.player.ImmutablePlayerKnowledge;
import org.jskat.util.Player;

public abstract class AbstractOpponentPartyCardStrategy extends
		AbstractCardStrategy {

	protected static Set<Player> getOpponentPartyMembers(
			ImmutablePlayerKnowledge knowledge) {

		Set<Player> result = new HashSet<Player>();
		if (knowledge.getDeclarer().equals(knowledge.getPlayerPosition())) {
			// player is declarer
			result.add(knowledge.getDeclarer().getLeftNeighbor());
			result.add(knowledge.getDeclarer().getRightNeighbor());
		} else {
			// player is opponent
			result.add(knowledge.getDeclarer());
		}
		return result;
	}
}