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/*
 * #%L
 * ELK Reasoner
 * $Id:$
 * $HeadURL:$
 * %%
 * Copyright (C) 2011 - 2016 Department of Computer Science, University of Oxford
 * %%
 * 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.
 * #L%
 */
package org.semanticweb.elk.reasoner.taxonomy.impl;

import java.util.ArrayList;
import java.util.List;

import org.semanticweb.elk.reasoner.taxonomy.model.Node;
import org.semanticweb.elk.reasoner.taxonomy.model.NodeStore;

public abstract class AbstractNodeStore>
		implements NodeStore {

	/** The listeners notified about the changes. */
	protected final List> listeners_;

	public AbstractNodeStore() {
		this.listeners_ = new ArrayList>();
	}

	@Override
	public boolean addListener(final Listener listener) {
		return listeners_.add(listener);
	}

	@Override
	public boolean removeListener(final Listener listener) {
		return listeners_.remove(listener);
	}

	protected void fireMemberForNodeAppeared(final Node node) {
		for (final Listener listener : listeners_) {
			for (final T member : node) {
				listener.memberForNodeAppeared(member, node);
			}
		}
	}

	protected void fireMemberForNodeDisappeared(final Node node) {
		for (final Listener listener : listeners_) {
			for (final T member : node) {
				listener.memberForNodeDisappeared(member, node);
			}
		}
	}

}