/*
* The MIT License
*
* Copyright (c) 2012, CloudBees, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* THE SOFTWARE.
*/
package jenkins.model.lazy;
/**
* ceil/floor/lower/higher implementations
* that takes the return value of a binary search as an input.
*
* <p>
* Consider a sorted array of int X={x<sub>i</sub>} and a binary search of p on it.
* this class provides likes of {@code ceil(X,p)} which is the smallest x<sub>i</sub>
* that still satisfies x<sub>i</sub> >= p.
*
* Similarly, {@link #HIGHER} is the smallest x<sub>i</sub>
* that still satisfies x<sub>i</sub> > p.
*
* @author Kohsuke Kawaguchi
*/
enum Boundary {
LOWER(-1,-1),
HIGHER(1,0),
FLOOR(0,-1),
CEIL(0,0);
private final int offsetOfExactMatch, offsetOfInsertionPoint;
private Boundary(int offsetOfExactMatch, int offsetOfInsertionPoint) {
this.offsetOfExactMatch = offsetOfExactMatch;
this.offsetOfInsertionPoint = offsetOfInsertionPoint;
}
/**
* Computes the boundary value.
*/
public int apply(int binarySearchOutput) {
int r = binarySearchOutput;
if (r>=0) return r+offsetOfExactMatch; // if we had some x_i==p
int ip = -(r+1);
return ip+offsetOfInsertionPoint;
}
}