001 // --- BEGIN LICENSE BLOCK --- 002 /* 003 * Copyright (c) 2009, Mikio L. Braun 004 * All rights reserved. 005 * 006 * Redistribution and use in source and binary forms, with or without 007 * modification, are permitted provided that the following conditions are 008 * met: 009 * 010 * * Redistributions of source code must retain the above copyright 011 * notice, this list of conditions and the following disclaimer. 012 * 013 * * Redistributions in binary form must reproduce the above 014 * copyright notice, this list of conditions and the following 015 * disclaimer in the documentation and/or other materials provided 016 * with the distribution. 017 * 018 * * Neither the name of the Technische Universit??t Berlin nor the 019 * names of its contributors may be used to endorse or promote 020 * products derived from this software without specific prior 021 * written permission. 022 * 023 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 024 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 025 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 026 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 027 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 028 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 029 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 030 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 031 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 032 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 033 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 034 */ 035 // --- END LICENSE BLOCK --- 036 037 /* 038 * To change this template, choose Tools | Templates 039 * and open the template in the editor. 040 */ 041 package org.jblas.la.ranges; 042 043 /** 044 * Range which varies from a given interval. Endpoints are both inclusive! 045 */ 046 public class IntervalRange implements Range { 047 private int start; 048 private int end; 049 private int value; 050 private int counter; 051 052 /** Construct new interval range. Endpoints are inclusive. */ 053 public IntervalRange(int a, int b) { 054 start = a; 055 end = b; 056 } 057 058 public void init(int lower, int upper) { 059 value = start; 060 counter = 0; 061 if (start < lower || end > upper) { 062 throw new IllegalArgumentException("Bounds " + lower + " to " + upper + " are beyond range interval " + start + " to " + end + "."); 063 } 064 } 065 066 public int length() { 067 return end - start + 1; 068 } 069 070 public void next() { 071 counter++; 072 value++; 073 } 074 075 public int index() { 076 return counter; 077 } 078 079 public int value() { 080 return value; 081 } 082 083 public boolean hasMore() { 084 return counter < end; 085 } 086 }