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HADOOP-16156. [Clean-up] Remove NULL check before instanceof and fix checkstyle in InnerNodeImpl. Contributed by Shweta Yakkali. 

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>
(cherry picked from commit dd4a7633ec)
This commit is contained in:
Shweta Yakkali 2019-06-17 23:47:01 -07:00 committed by Wei-Chiu Chuang
parent f148b29508
commit 99abd35a75
1 changed files with 25 additions and 19 deletions
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42
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/net/InnerNodeImpl.java
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@ -41,26 +41,29 @@ public class InnerNodeImpl extends NodeBase implements InnerNode {
protected final Map<String, Node> childrenMap = new HashMap<>(); protected final Map<String, Node> childrenMap = new HashMap<>();
protected int numOfLeaves; protected int numOfLeaves;
/** Construct an InnerNode from a path-like string */ /** Construct an InnerNode from a path-like string. */
protected InnerNodeImpl(String path) { protected InnerNodeImpl(String path) {
super(path); super(path);
} }
/** Construct an InnerNode /** Construct an InnerNode
* from its name, its network location, its parent, and its level */ * from its name, its network location, its parent, and its level. */
protected InnerNodeImpl(String name, String location, InnerNode parent, int level) { protected InnerNodeImpl(String name, String location,
InnerNode parent, int level) {
super(name, location, parent, level); super(name, location, parent, level);
} }
@Override @Override
public List<Node> getChildren() {return children;} public List<Node> getChildren() {
return children;
}
/** @return the number of children this node has */ /** @return the number of children this node has. */
int getNumOfChildren() { int getNumOfChildren() {
return children.size(); return children.size();
} }
/** Judge if this node represents a rack /** Judge if this node represents a rack.
* @return true if it has no child or its children are not InnerNodes * @return true if it has no child or its children are not InnerNodes
*/ */
public boolean isRack() { public boolean isRack() {
@ -76,7 +79,7 @@ public class InnerNodeImpl extends NodeBase implements InnerNode {
return true; return true;
} }
/** Judge if this node is an ancestor of node <i>n</i> /** Judge if this node is an ancestor of node <i>n</i>.
* *
* @param n a node * @param n a node
* @return true if this node is an ancestor of <i>n</i> * @return true if this node is an ancestor of <i>n</i>
@ -87,7 +90,7 @@ public class InnerNodeImpl extends NodeBase implements InnerNode {
startsWith(getPath(this)+NodeBase.PATH_SEPARATOR_STR); startsWith(getPath(this)+NodeBase.PATH_SEPARATOR_STR);
} }
/** Judge if this node is the parent of node <i>n</i> /** Judge if this node is the parent of node <i>n</i>.
* *
* @param n a node * @param n a node
* @return true if this node is the parent of <i>n</i> * @return true if this node is the parent of <i>n</i>
@ -107,8 +110,9 @@ public class InnerNodeImpl extends NodeBase implements InnerNode {
name = name.substring(1); name = name.substring(1);
} }
int index=name.indexOf(PATH_SEPARATOR); int index=name.indexOf(PATH_SEPARATOR);
if (index !=-1) if (index != -1) {
name = name.substring(0, index); name = name.substring(0, index);
}
return name; return name;
} }
@ -168,7 +172,8 @@ public class InnerNodeImpl extends NodeBase implements InnerNode {
* @see InnerNodeImpl(String, String, InnerNode, int) * @see InnerNodeImpl(String, String, InnerNode, int)
*/ */
private InnerNodeImpl createParentNode(String parentName) { private InnerNodeImpl createParentNode(String parentName) {
return new InnerNodeImpl(parentName, getPath(this), this, this.getLevel()+1); return new InnerNodeImpl(parentName,
getPath(this), this, this.getLevel() + 1);
} }
@Override @Override
@ -220,14 +225,16 @@ public class InnerNodeImpl extends NodeBase implements InnerNode {
@Override @Override
public Node getLoc(String loc) { public Node getLoc(String loc) {
if (loc == null || loc.length() == 0) return this; if (loc == null || loc.length() == 0) {
return this;
}
String[] path = loc.split(PATH_SEPARATOR_STR, 2); String[] path = loc.split(PATH_SEPARATOR_STR, 2);
Node childnode = childrenMap.get(path[0]); Node childNode = childrenMap.get(path[0]);
if (childnode == null) return null; // non-existing node if (childNode == null || path.length == 1) {
if (path.length == 1) return childnode; return childNode;
if (childnode instanceof InnerNode) { } else if (childNode instanceof InnerNode) {
return ((InnerNode)childnode).getLoc(path[1]); return ((InnerNode)childNode).getLoc(path[1]);
} else { } else {
return null; return null;
} }
@ -237,8 +244,7 @@ public class InnerNodeImpl extends NodeBase implements InnerNode {
public Node getLeaf(int leafIndex, Node excludedNode) { public Node getLeaf(int leafIndex, Node excludedNode) {
int count=0; int count=0;
// check if the excluded node a leaf // check if the excluded node a leaf
boolean isLeaf = boolean isLeaf = !(excludedNode instanceof InnerNode);
excludedNode == null || !(excludedNode instanceof InnerNode);
// calculate the total number of excluded leaf nodes // calculate the total number of excluded leaf nodes
int numOfExcludedLeaves = int numOfExcludedLeaves =
isLeaf ? 1 : ((InnerNode)excludedNode).getNumOfLeaves(); isLeaf ? 1 : ((InnerNode)excludedNode).getNumOfLeaves();