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/*******************************************************************************
 * Copyright 2013 Lars Behnke
 * 
 * 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 com.apporiented.algorithm.clustering;

import java.util.Collection;

public class SingleLinkageStrategy implements LinkageStrategy {

	@Override
	public Double calculateDistance(Collection distances) {
		double min = Double.NaN;

		for (Double dist : distances) {
		    if (Double.isNaN(min) || dist < min)
		        min = dist;
		}
		return min;
	}
}