55 lines
1.3 KiB
Java
55 lines
1.3 KiB
Java
package org.insa.graph;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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/**
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* Implementation of Arc that represents a "backward" arc in a graph, i.e. an
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* arc that is the reverse of another one. This arc only holds a reference to
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* the original arc.
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*
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*/
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class ArcBackward extends Arc {
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// Original arc
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private final Arc originalArc;
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/**
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* Create a new backward arc which corresponds to the reverse arc of the given
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* arc.
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*
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* @param originalArc Original forwarc arc corresponding to this backward arc.
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*/
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protected ArcBackward(Arc originalArc) {
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this.originalArc = originalArc;
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}
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@Override
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public Node getOrigin() {
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return this.originalArc.getDestination();
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}
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@Override
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public Node getDestination() {
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return this.originalArc.getOrigin();
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}
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@Override
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public float getLength() {
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return this.originalArc.getLength();
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}
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@Override
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public RoadInformation getRoadInformation() {
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return this.originalArc.getRoadInformation();
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}
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@Override
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public List<Point> getPoints() {
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List<Point> pts = new ArrayList<>(this.originalArc.getPoints());
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Collections.reverse(pts);
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return pts;
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}
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}
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