1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany |
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2 | // |
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3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 | // you may not use this file except in compliance with the License. |
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5 | // You may obtain a copy of the License at |
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6 | // |
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7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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8 | // |
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9 | // Unless required by applicable law or agreed to in writing, software |
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10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 | // See the License for the specific language governing permissions and |
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13 | // limitations under the License. |
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14 | |
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15 | package de.ugoe.cs.autoquest.usageprofiles; |
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16 | |
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17 | import java.io.Serializable; |
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18 | |
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19 | /** |
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20 | * <p> |
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21 | * The symbol strategy is used in a trie for comparing symbols and for storing symbols in maps. |
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22 | * The symbol strategy can be changed to improve the performance of the trie depending on the type |
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23 | * of symbols. |
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24 | * </p> |
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25 | * |
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26 | * @author Patrick Harms |
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27 | * |
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28 | * @param <T> |
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29 | * Type of the symbols that are compared and stored |
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30 | * @see Trie |
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31 | */ |
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32 | public interface SymbolStrategy<T> extends Serializable { |
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33 | |
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34 | /** |
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35 | * <p> |
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36 | * Returns a comparator for symbols that can be used to compare two symbols |
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37 | * </p> |
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38 | * |
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39 | * @return a comparator for symbols |
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40 | * |
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41 | * @see SymbolComparator |
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42 | */ |
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43 | public SymbolComparator<T> getSymbolComparator(); |
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44 | |
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45 | /** |
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46 | * <p> |
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47 | * returns a new empty map for storing symbols and associated values. The symbols are the |
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48 | * keys of the map. |
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49 | * </p> |
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50 | * |
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51 | * @return as described |
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52 | * |
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53 | * @see SymbolMap |
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54 | */ |
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55 | public <V> SymbolMap<T, V> createSymbolMap(); |
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56 | |
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57 | /** |
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58 | * <p> |
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59 | * returns a copy of the provided map for storing symbols and associated values. |
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60 | * </p> |
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61 | * |
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62 | * @return as described |
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63 | * |
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64 | * @see SymbolMap |
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65 | */ |
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66 | public <V> SymbolMap<T, V> copySymbolMap(SymbolMap<T, V> other); |
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67 | |
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68 | } |
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