content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.activemq.store.kahadb.disk.util;
  
  /**
   * Represents a range of numbers.
   * 
   * @author chirino
   */
  public class Sequence extends LinkedNode<Sequence> {
      long first;
      long last;
  
      public Sequence(long value) {
          first = last = value;
      }
  
      public Sequence(long first, long last) {
          this.first = first;
          this.last = last;
      }
  
      public boolean isAdjacentToLast(long value) {
          return last + 1 == value;
      }
  
      public boolean isBiggerButNotAdjacentToLast(long value) {
          return last + 1 < value;
      }
  
      public boolean isAdjacentToFirst(long value) {
          return first - 1 == value;
      }
  
      public boolean contains(long value) {
          return first <= value && value <= last;
      }
  
      public long range() {
          return first == last ? 1 : (last - first) + 1;
      }
      
      @Override
      public String toString() {
          return first == last ? "" + first : first + ".." + last;
      }
  
      public long getFirst() {
          return first;
      }
  
      public void setFirst(long first) {
          this.first = first;
      }
  
      public long getLast() {
          return last;
      }
  
      public void setLast(long last) {
          this.last = last;
      }
      
      public interface Closure<T extends Throwable> {
          public void execute(long value) throws T;
      }
  
      public <T extends Throwable> void each(Closure<T> closure) throws T {
          for( long i=first; i<=last; i++ ) {
              closure.execute(i);
          }
      }
  
  }