Mahesh Poojary Huawei | 46fb4db | 2016-07-14 12:38:17 +0530 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2016-present Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.onosproject.yangutils.datamodel.utils; |
| 18 | |
| 19 | import org.onosproject.yangutils.datamodel.exceptions.DataModelException; |
| 20 | |
| 21 | import java.math.BigDecimal; |
| 22 | import java.util.ArrayList; |
| 23 | |
| 24 | /** |
| 25 | * The "fraction-digits" statement, which is a substatement to the |
| 26 | * "type" statement, MUST be present if the type is "decimal64". It |
| 27 | * takes as an argument an integer between 1 and 18, inclusively. It |
| 28 | * controls the size of the minimum difference between values of a |
| 29 | * decimal64 type, by restricting the value space to numbers that are |
| 30 | * expressible as "i x 10^-n" where n is the fraction-digits argument. |
| 31 | * |
| 32 | * +----------------+-----------------------+----------------------+ |
| 33 | * | fraction-digit | min | max | |
| 34 | * +----------------+-----------------------+----------------------+ |
| 35 | * | 1 | -922337203685477580.8 | 922337203685477580.7 | |
| 36 | * | 2 | -92233720368547758.08 | 92233720368547758.07 | |
| 37 | * | 3 | -9223372036854775.808 | 9223372036854775.807 | |
| 38 | * | 4 | -922337203685477.5808 | 922337203685477.5807 | |
| 39 | * | 5 | -92233720368547.75808 | 92233720368547.75807 | |
| 40 | * | 6 | -9223372036854.775808 | 9223372036854.775807 | |
| 41 | * | 7 | -922337203685.4775808 | 922337203685.4775807 | |
| 42 | * | 8 | -92233720368.54775808 | 92233720368.54775807 | |
| 43 | * | 9 | -9223372036.854775808 | 9223372036.854775807 | |
| 44 | * | 10 | -922337203.6854775808 | 922337203.6854775807 | |
| 45 | * | 11 | -92233720.36854775808 | 92233720.36854775807 | |
| 46 | * | 12 | -9223372.036854775808 | 9223372.036854775807 | |
| 47 | * | 13 | -922337.2036854775808 | 922337.2036854775807 | |
| 48 | * | 14 | -92233.72036854775808 | 92233.72036854775807 | |
| 49 | * | 15 | -9223.372036854775808 | 9223.372036854775807 | |
| 50 | * | 16 | -922.3372036854775808 | 922.3372036854775807 | |
| 51 | * | 17 | -92.23372036854775808 | 92.23372036854775807 | |
| 52 | * | 18 | -9.223372036854775808 | 9.223372036854775807 | |
| 53 | * +----------------+-----------------------+----------------------+ |
| 54 | */ |
| 55 | |
| 56 | /** |
| 57 | * Represents the decimal64 value range based on fraction-digits. |
| 58 | */ |
| 59 | public final class FractionDigits { |
| 60 | |
| 61 | public static class Range { |
| 62 | private double min; |
| 63 | private double max; |
| 64 | |
| 65 | /** |
| 66 | * Creates an instance of range. |
| 67 | * |
| 68 | * @param min minimum value of decimal64 |
| 69 | * @param max maximum value of decimal64 |
| 70 | */ |
| 71 | protected Range(double min, double max) { |
| 72 | this.min = min; |
| 73 | this.max = max; |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Retrieve minimum value range. |
| 78 | * |
| 79 | * @return minimum value range |
| 80 | */ |
| 81 | public double getMin() { |
| 82 | return min; |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Retrieve maximum value range. |
| 87 | * |
| 88 | * @return maximum value range |
| 89 | */ |
| 90 | public double getMax() { |
| 91 | return max; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | private static ArrayList<Range> decimal64ValueRange = null; |
| 96 | |
| 97 | /** |
| 98 | * Creates a fraction-digits instance. |
| 99 | */ |
| 100 | private FractionDigits() { |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Generates decimal64 value range based on fraction-digits. |
| 105 | * |
| 106 | * @return decimal64 value range by fraction-digits as index |
| 107 | */ |
| 108 | private static ArrayList<Range> getDecimal64ValueRange() { |
| 109 | if (decimal64ValueRange == null) { |
| 110 | decimal64ValueRange = new ArrayList<>(); |
| 111 | decimal64ValueRange.add(new Range(-922337203685477580.8, 922337203685477580.7)); // fraction-digit: 1 |
| 112 | decimal64ValueRange.add(new Range(-92233720368547758.08, 92233720368547758.07)); // fraction-digit: 2 |
| 113 | decimal64ValueRange.add(new Range(-9223372036854775.808, 9223372036854775.807)); // fraction-digit: 3 |
| 114 | decimal64ValueRange.add(new Range(-922337203685477.5808, 922337203685477.5807)); // fraction-digit: 4 |
| 115 | decimal64ValueRange.add(new Range(-92233720368547.75808, 92233720368547.75807)); // fraction-digit: 5 |
| 116 | decimal64ValueRange.add(new Range(-9223372036854.775808, 9223372036854.775807)); // fraction-digit: 6 |
| 117 | decimal64ValueRange.add(new Range(-922337203685.4775808, 922337203685.4775807)); // fraction-digit: 7 |
| 118 | decimal64ValueRange.add(new Range(-92233720368.54775808, 92233720368.54775807)); // fraction-digit: 8 |
| 119 | decimal64ValueRange.add(new Range(-9223372036.854775808, 9223372036.854775807)); // fraction-digit: 9 |
| 120 | decimal64ValueRange.add(new Range(-922337203.6854775808, 922337203.6854775807)); // fraction-digit: 10 |
| 121 | decimal64ValueRange.add(new Range(-92233720.36854775808, 92233720.36854775807)); // fraction-digit: 11 |
| 122 | decimal64ValueRange.add(new Range(-9223372.036854775808, 9223372.036854775807)); // fraction-digit: 12 |
| 123 | decimal64ValueRange.add(new Range(-922337.2036854775808, 922337.2036854775807)); // fraction-digit: 13 |
| 124 | decimal64ValueRange.add(new Range(-92233.72036854775808, 92233.72036854775807)); // fraction-digit: 14 |
| 125 | decimal64ValueRange.add(new Range(-9223.372036854775808, 9223.372036854775807)); // fraction-digit: 15 |
| 126 | decimal64ValueRange.add(new Range(-922.3372036854775808, 922.3372036854775807)); // fraction-digit: 16 |
| 127 | decimal64ValueRange.add(new Range(-92.23372036854775808, 92.23372036854775807)); // fraction-digit: 17 |
| 128 | decimal64ValueRange.add(new Range(-9.223372036854775808, 9.223372036854775807)); // fraction-digit: 18 |
| 129 | } |
| 130 | return decimal64ValueRange; |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Checks given decimal64 value is in the specific range based on given fraction-digit. |
| 135 | * |
| 136 | * @param value decimal64 value |
| 137 | * @param fractionDigit fraction-digits |
| 138 | * @return success when it is in specific range otherwise false |
| 139 | */ |
| 140 | public static boolean isValidDecimal64(BigDecimal value, int fractionDigit) { |
| 141 | if (!((fractionDigit >= 1) && (fractionDigit <= 18))) { |
| 142 | return false; |
| 143 | } |
| 144 | |
| 145 | // ArrayList index starts from 0. |
| 146 | Range range = getDecimal64ValueRange().get(fractionDigit - 1); |
| 147 | if ((value.doubleValue() >= range.min) && (value.doubleValue() <= range.max)) { |
| 148 | return true; |
| 149 | } |
| 150 | return false; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * Retrieve range based on fraction-digits. |
| 155 | * |
| 156 | * @param fractionDigit fraction-digits |
| 157 | * @return range |
| 158 | * @throws DataModelException a violation of data model rules |
| 159 | */ |
| 160 | public static Range getRange(int fractionDigit) throws DataModelException { |
| 161 | if (!((fractionDigit >= 1) && (fractionDigit <= 18))) { |
| 162 | throw new DataModelException("YANG file error : given fraction-digit is not in its range (1..18)."); |
| 163 | } |
| 164 | |
| 165 | return getDecimal64ValueRange().get(fractionDigit - 1); |
| 166 | } |
| 167 | } |