| /* |
| * 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.samoa.instances; |
| |
| import java.io.Serializable; |
| |
| public class Range implements Serializable { |
| |
| //Only works for ranges "start-end" |
| private int start = 0; |
| private int end = 0; |
| private int upperLimit = 0; |
| private final String rangeText; |
| |
| public Range(String range) { |
| this.rangeText = range; |
| //this.setRange(range); //needs upperLimit |
| } |
| |
| /** |
| * Sets the range from a string representation. |
| * |
| * @param range the start and end string |
| * |
| */ |
| public void setRange(String range) { |
| String single = range.trim(); |
| int hyphenIndex = range.indexOf('-'); |
| |
| if (hyphenIndex > 0) { |
| this.start = rangeSingle(range.substring(0, hyphenIndex)); |
| this.end = rangeSingle(range.substring(hyphenIndex + 1)); |
| } else { |
| int number = rangeSingle(range); |
| if (number >= 0) { // first n attributes |
| this.start = 0; |
| this.end = number; |
| } else { // last n attributes |
| this.start = this.upperLimit + number > 0 ? this.upperLimit + number : 0; |
| this.end = this.upperLimit - 1; |
| } |
| } |
| } |
| |
| /** |
| * Translates a single string selection into it's internal 0-based |
| * equivalent. |
| * |
| * @param single the string representing the selection (eg: 1 first last) |
| * @return the number corresponding to the selected value |
| */ |
| protected /*@pure@*/ int rangeSingle(/*@non_null@*/String singleSelection) { |
| |
| String single = singleSelection.trim(); |
| if (single.toLowerCase().equals("first")) { |
| return 0; |
| } |
| if (single.toLowerCase().equals("last") || single.toLowerCase().equals("-1")) { |
| return -1; |
| } |
| int index = Integer.parseInt(single); |
| if (index >= 1) { //Non for negatives |
| index--; |
| } |
| return index; |
| } |
| |
| boolean isInRange(int value) { |
| boolean ret = false; |
| if (value >= start && value <= end) { |
| ret = true; |
| } |
| return ret; |
| } |
| |
| int getSelectionLength() { |
| return end - start + 1; |
| } |
| |
| public void setUpper(int attributeNumber) { |
| this.upperLimit = attributeNumber; |
| this.setRange(this.rangeText); |
| } |
| |
| //JD |
| public int getStart() { |
| return start; |
| } |
| |
| //JD |
| |
| public int getEnd() { |
| return end; |
| } |
| |
| } |