com.google.inject.grapher.Edge Maven / Gradle / Ivy
/**
* Copyright (C) 2011 Google Inc.
*
* 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.google.inject.grapher;
import com.google.common.base.Objects;
/**
* Edge in a guice dependency graph.
*
* @author [email protected] (Bojan Djordjevic)
*/
public abstract class Edge {
private final NodeId fromId;
private final NodeId toId;
protected Edge(NodeId fromId, NodeId toId) {
this.fromId = fromId;
this.toId = toId;
}
public NodeId getFromId() {
return fromId;
}
public NodeId getToId() {
return toId;
}
@Override public boolean equals(Object obj) {
if (!(obj instanceof Edge)) {
return false;
}
Edge other = (Edge) obj;
return Objects.equal(fromId, other.fromId) && Objects.equal(toId, other.toId);
}
@Override public int hashCode() {
return Objects.hashCode(fromId, toId);
}
/**
* Returns a copy of the edge with new node IDs.
*
* @param fromId new ID of the 'from' node
* @param toId new ID of the 'to' node
* @return copy of the edge with the new node IDs
*/
public abstract Edge copy(NodeId fromId, NodeId toId);
}