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package org.onap.ccsdk.sli.core.slipluginutils.slitopologyutils.graph;
/**
* Default weigher returns identical weight for every graph edge. Basically it
* is a hop count weigher.
* Produces weights of {@link ScalarWeight} type.
*
* @param <V> vertex type
* @param <E> edge type
*/
public class DefaultEdgeWeigher<V extends Vertex, E extends Edge<V>>
implements EdgeWeigher<V, E> {
/**
* Common weight value for any link.
*/
protected static final double HOP_WEIGHT_VALUE = 1;
/**
* Weight value for null path (without links).
*/
protected static final double NULL_WEIGHT_VALUE = 0;
/**
* Default weight based on hop count.
* {@value #HOP_WEIGHT_VALUE}
*/
public static final ScalarWeight DEFAULT_HOP_WEIGHT =
new ScalarWeight(HOP_WEIGHT_VALUE);
/**
* Default initial weight.
* {@value #NULL_WEIGHT_VALUE}
*/
public static final ScalarWeight DEFAULT_INITIAL_WEIGHT =
new ScalarWeight(NULL_WEIGHT_VALUE);
@Override
public Weight weight(E edge) {
return DEFAULT_HOP_WEIGHT;
}
@Override
public Weight getInitialWeight() {
return DEFAULT_INITIAL_WEIGHT;
}
@Override
public Weight getNonViableWeight() {
return ScalarWeight.NON_VIABLE_WEIGHT;
}
}
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