hadoop InnerNode 源码
haddop InnerNode 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/net/InnerNode.java
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.net;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import java.util.List;
@InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
@InterfaceStability.Unstable
public interface InnerNode extends Node {
interface Factory<N extends InnerNode> {
/**
* @return Construct an InnerNode from a path-like string.
* @param path input path.
*/
N newInnerNode(String path);
}
/** Add node <i>n</i> to the subtree of this node
* @param n node to be added
* @return true if the node is added; false otherwise
*/
boolean add(Node n);
/** Given a node's string representation, return a reference to the node
* @param loc string location of the form /rack/node
* @return null if the node is not found or the childnode is there but
* not an instance of {@link InnerNodeImpl}
*/
Node getLoc(String loc);
/** @return its children */
List<Node> getChildren();
/** @return the number of children this node has. */
int getNumOfChildren();
/** @return the number of leave nodes. */
int getNumOfLeaves();
/** Remove node <i>n</i> from the subtree of this node
* @param n node to be deleted
* @return true if the node is deleted; false otherwise
*/
boolean remove(Node n);
/** get <i>leafIndex</i> leaf of this subtree
* if it is not in the <i>excludedNode</i>
*
* @param leafIndex an indexed leaf of the node
* @param excludedNode an excluded node (can be null)
* @return the leaf node corresponding to the given index.
*/
Node getLeaf(int leafIndex, Node excludedNode);
}
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