| package org.onlab.graph; |
| |
| import java.util.Objects; |
| |
| import static com.google.common.base.MoreObjects.toStringHelper; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Abstract graph edge implementation. |
| */ |
| public abstract class AbstractEdge<V extends Vertex> implements Edge<V> { |
| |
| private final V src; |
| private final V dst; |
| |
| /** |
| * Creates a new edge between the specified source and destination vertexes. |
| * |
| * @param src source vertex |
| * @param dst destination vertex |
| */ |
| public AbstractEdge(V src, V dst) { |
| this.src = checkNotNull(src, "Source vertex cannot be null"); |
| this.dst = checkNotNull(dst, "Destination vertex cannot be null"); |
| } |
| |
| @Override |
| public V src() { |
| return src; |
| } |
| |
| @Override |
| public V dst() { |
| return dst; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(src, dst); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof AbstractEdge) { |
| final AbstractEdge other = (AbstractEdge) obj; |
| return Objects.equals(this.src, other.src) && Objects.equals(this.dst, other.dst); |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return toStringHelper(this) |
| .add("src", src) |
| .add("dst", dst) |
| .toString(); |
| } |
| } |