001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.fusesource.hawtdb.util.list; 018 019 020 /** 021 * Represents a range of numbers. 022 * 023 * @author chirino 024 */ 025 public class Sequence extends LinkedNode<Sequence> { 026 long first; 027 long last; 028 029 public Sequence(long value) { 030 first = last = value; 031 } 032 033 public Sequence(long first, long last) { 034 this.first = first; 035 this.last = last; 036 } 037 038 public boolean isAdjacentToLast(long value) { 039 return last + 1 == value; 040 } 041 042 public boolean isAdjacentToFirst(long value) { 043 return first - 1 == value; 044 } 045 046 public boolean contains(long value) { 047 return first <= value && value <= last; 048 } 049 050 public long range() { 051 return first == last ? 1 : (last - first) + 1; 052 } 053 054 @Override 055 public String toString() { 056 return first == last ? "" + first : first + "-" + last; 057 } 058 059 public long getFirst() { 060 return first; 061 } 062 063 public void setFirst(long first) { 064 this.first = first; 065 } 066 067 public long getLast() { 068 return last; 069 } 070 071 public void setLast(long last) { 072 this.last = last; 073 } 074 075 public interface Closure<T extends Throwable> { 076 public void execute(long value) throws T; 077 } 078 079 public <T extends Throwable> void each(Closure<T> closure) throws T { 080 for( long i=first; i<=last; i++ ) { 081 closure.execute(i); 082 } 083 } 084 085 }