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 */ 041package org.jblas.ranges; 042 043/** 044 * Range which varies from a given interval. Endpoint is exclusive! 045 * 046 * "new IntervalRange(0, 3)" enumerates 0, 1, 2. 047 */ 048public class IntervalRange implements Range { 049 private int start; 050 private int end; 051 private int value; 052 053 /** Construct new interval range. Endpoints are inclusive. */ 054 public IntervalRange(int a, int b) { 055 start = a; 056 end = b; 057 } 058 059 public void init(int lower, int upper) { 060 value = start; 061 if (start < lower || end > upper + 1) { 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; 068 } 069 070 public void next() { 071 value++; 072 } 073 074 public int index() { 075 return value; 076 } 077 078 public int value() { 079 return value; 080 } 081 082 public boolean hasMore() { 083 return value < end; 084 } 085}