de.uni.freiburg.iig.telematik.jagal.graph.weighted.WeightedEdge Maven / Gradle / Ivy

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package de.uni.freiburg.iig.telematik.jagal.graph.weighted;

import de.uni.freiburg.iig.telematik.jagal.graph.Edge;
import de.uni.freiburg.iig.telematik.jagal.graph.Vertex;


/**
 * Represents an edge that maintains a weight.
 * 
 * @author Thomas Stocker
 *
 */
public class WeightedEdge> extends Edge implements Comparable>{
	
	public static final int DEFAULT_WEIGHT = 1;
	private double weight = DEFAULT_WEIGHT;
	
	public WeightedEdge(){}
	
	public WeightedEdge(V source, V target){
		super(source, target);
	}
	
	public WeightedEdge(V source, V target, double weight){
		this(source, target);
		this.weight = weight;
	}
	
	/**
	 * Returns the weight of this edge.
	 * @return The edge weight.
	 */
	public double getWeight(){
		return weight;
	}
	
	/**
	 * Sets the weight of this edge.
	 * @param weight Edge weight.
	 */
	public void setWeight(double weight){
		this.weight = weight;
	}
	
	public WeightedEdge clone(){
		return new WeightedEdge(source, target, weight);
	}

	@Override
	public int compareTo(WeightedEdge o) {
		if (this == o)
			   return 0;
			if (o == null)
			   return 0;
			if (o.getClass() != getClass())
			   return 0;
			
			if(this.weight<((WeightedEdge) o).getWeight()){
				return 1;
			}
			if(this.weight>((WeightedEdge) o).getWeight()){
				return -1;
			}
			return 0;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = super.hashCode();
		long temp;
		temp = Double.doubleToLongBits(weight);
		result = prime * result + (int) (temp ^ (temp >>> 32));
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (!super.equals(obj))
			return false;
		if (getClass() != obj.getClass())
			return false;
		@SuppressWarnings("unchecked")
		WeightedEdge other = (WeightedEdge) obj;
		if (Double.doubleToLongBits(weight) != Double
				.doubleToLongBits(other.weight))
			return false;
		return true;
	}

	@Override
	public String toString(){
		return "("+source+"-"+weight+"->"+target+")";
	}
	
}