/*
* Copyright ( c ) 2008 , 2019 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
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* questions .
*/
package jit.graph;
// This class define the tree node.
public class Node {
public final static int Black = 0 ; // constants used to define the
public final static int Red = 1 ; // node color
public final static int Left_son = 2 ; // constants used to identify
public final static int Right_son = 3 ;// the node parent and sons.
public final static int Parent = 4 ;
private int color;
private int key;
private Node L, R, P; // L-left son,R-right son,P-parent
// constructor create a new node the default color is red
// the default appearance (bold) is regular.
// initialize the key field.
public Node(int k) {
color = Red;
key = k;
L = null ;
R = null ;
P = null ;
}
// constructor for constructing a tree null object, is color
// is black.
public Node() {
color = Black;
key = -1 ;
L = null ;
R = null ;
P = null ;
}
// This method set the node key.
public void setKey(int k) {
key = k;
}
// This method return the node key.
public int getKey() {
return (key);
}
// This method set the node color.
public void setColor(int c) {
if (c == Black) {
color = Black;
} else if (c == Red) {
color = Red;
}
}
// This method return the node color.
public int getColor() {
return (color);
}
// This method set the node parent or childs acording to the who
// parameter.
public void setNode(int who, Node n) {
switch (who) {
case Left_son:
L = n;
break ;
case Right_son:
R = n;
break ;
case Parent:
P = n;
break ;
}
}
// This method return the node parent or childs acording to the who
// parameter.
public Node getNode(int who) {
switch (who) {
case Left_son:
return L;
case Right_son:
return R;
case Parent:
return P;
}
return null ;
}
}
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