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annotate Collections/DictionaryToArrayConverter.cs @ 13:6b762694f051

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Check size of dictionary so that we don't have to get the values when we've got an empty dictionary no-open-ticket
author IBBoard <dev@ibboard.co.uk>
date Tue, 06 Jan 2009 19:27:47 +0000
parents 465b672e9682
children
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1 // DictionaryToArrayConverter.cs is a part of the IBBoard utils library (referred to from here as "this program")
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2 //
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3 // Copyright (C) 2009 IBBoard
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4 //
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5 // This program is free software: you can redistribute it and/or modify
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6 // it under the terms of the GNU Lesser General Public License as published by
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7 // the Free Software Foundation, either version 3 of the License, or
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8 // (at your option) any later version.
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9 //
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10 // This program is distributed in the hope that it will be useful,
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11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 // GNU Lesser General Public License for more details.
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14 //
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15 // You should have received a copy of the GNU Lesser General Public License
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16 // along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 //
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18
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19 using System;
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20 using System.Collections.Generic;
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21
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22 namespace IBBoard
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23 {
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26 public class DictionaryToArrayConverter
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27 {
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28 /// <summary>
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29 /// Takes the set of values in a dictionary and returns them as an array of typed objects.
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30 /// </summary>
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31 /// <param name="dictionary">
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32 /// A <see cref="Dictionary`2"/> to extract an array of values from
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33 /// </param>
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34 /// <returns>
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35 /// An array of <see cref="VALUE_TYPE"/> objects taken from the Values property of the dictionary, or NULL if the dictionary is NULL
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36 /// </returns>
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37 public static VALUE_TYPE[] Convert<KEY_TYPE, VALUE_TYPE>(Dictionary<KEY_TYPE, VALUE_TYPE> dictionary)
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38 {
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39 if (dictionary == null)
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40 {
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41 return null;
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42 }
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43
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44 int entryCount = dictionary.Count;
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45 VALUE_TYPE[] col = new VALUE_TYPE[entryCount];
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46
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47 if (entryCount > 0)
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48 {
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49 dictionary.Values.CopyTo(col, 0);
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50 }
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51
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52 return col;
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53 }
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54 }
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55 }