Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2009 Mike Cumings |
| 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 com.kenai.jbosh; |
| 18 | |
| 19 | /** |
| 20 | * Abstract base class for attribute implementations based on {@code Integer} |
| 21 | * types. Additional support for parsing of integer values from their |
| 22 | * {@code String} representations as well as callback handling of value |
| 23 | * validity checks are also provided. |
| 24 | */ |
| 25 | abstract class AbstractIntegerAttr extends AbstractAttr<Integer> { |
| 26 | |
| 27 | /** |
| 28 | * Creates a new attribute object. |
| 29 | * |
| 30 | * @param val attribute value |
| 31 | * @throws BOSHException on parse or validation failure |
| 32 | */ |
| 33 | protected AbstractIntegerAttr(final int val) throws BOSHException { |
| 34 | super(Integer.valueOf(val)); |
| 35 | } |
| 36 | |
| 37 | /** |
| 38 | * Creates a new attribute object. |
| 39 | * |
| 40 | * @param val attribute value in string form |
| 41 | * @throws BOSHException on parse or validation failure |
| 42 | */ |
| 43 | protected AbstractIntegerAttr(final String val) throws BOSHException { |
| 44 | super(parseInt(val)); |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Utility method intended to be called by concrete implementation |
| 49 | * classes from within the {@code check()} method when the concrete |
| 50 | * class needs to ensure that the integer value does not drop below |
| 51 | * the specified minimum value. |
| 52 | * |
| 53 | * @param minVal minimum value to allow |
| 54 | * @throws BOSHException if the integer value is below the specific |
| 55 | * minimum |
| 56 | */ |
| 57 | protected final void checkMinValue(int minVal) throws BOSHException { |
| 58 | int intVal = getValue(); |
| 59 | if (intVal < minVal) { |
| 60 | throw(new BOSHException( |
| 61 | "Illegal attribute value '" + intVal + "' provided. " |
| 62 | + "Must be >= " + minVal)); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Utility method to parse a {@code String} into an {@code Integer}, |
| 68 | * converting any possible {@code NumberFormatException} thrown into |
| 69 | * a {@code BOSHException}. |
| 70 | * |
| 71 | * @param str string to parse |
| 72 | * @return integer value |
| 73 | * @throws BOSHException on {@code NumberFormatException} |
| 74 | */ |
| 75 | private static int parseInt(final String str) throws BOSHException { |
| 76 | try { |
| 77 | return Integer.parseInt(str); |
| 78 | } catch (NumberFormatException nfx) { |
| 79 | throw(new BOSHException( |
| 80 | "Could not parse an integer from the value provided: " |
| 81 | + str, |
| 82 | nfx)); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Returns the native {@code int} value of the underlying {@code Integer}. |
| 88 | * Will throw {@code NullPointerException} if the underlying |
| 89 | * integer was {@code null}. |
| 90 | * |
| 91 | * @return native {@code int} value |
| 92 | */ |
| 93 | public int intValue() { |
| 94 | return getValue().intValue(); |
| 95 | } |
| 96 | |
| 97 | } |