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1 /*******************************************************************************
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2 * Copyright (c) 2004, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.viewers.deferred.IntHashMap;
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14
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15 import tango.util.collection.HashMap;
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16
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17 /**
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18 * Represents a map of objects onto ints. This is intended for future optimization:
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19 * using int primitives would allow for an implementation that doesn't require
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20 * additional object allocations for Integers. However, the current implementation
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21 * simply delegates to the Java HashMap class.
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22 *
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23 * @since 3.1
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24 */
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25 /* package */ class IntHashMap {
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26 private HashMap!(Object,int) map;
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27
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28 /**
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29 * @param size
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30 * @param loadFactor
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31 */
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32 public this(int size, float loadFactor) {
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33 map = new HashMap!(Object,int);
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34 // (size, loadFactor);
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35 }
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36
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37 /**
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38 *
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39 */
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40 public this() {
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41 map = new HashMap!(Object,int);
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42 }
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43
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44 /**
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45 * @param key
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46 */
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47 public void remove(Object key) {
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48 map.removeKey(key);
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49 }
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50
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51 /**
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52 * @param key
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53 * @param value
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54 */
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55 public void put(Object key, int value) {
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56 map.add(key, value);
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57 }
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58
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59 /**
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60 * @param key
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61 * @return the int value at the given key
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62 */
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63 public int get(Object key) {
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64 return get(key, 0);
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65 }
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66
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67 /**
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68 * @param key
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69 * @param defaultValue
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70 * @return the int value at the given key, or the default value if this map does not contain the given key
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71 */
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72 public int get(Object key, int defaultValue) {
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73 if( map.containsKey( key )){
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74 return map.get(key);
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75 }
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76 return defaultValue;
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77 }
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78
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79 /**
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80 * @param key
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81 * @return <code>true</code> if this map contains the given key, <code>false</code> otherwise
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82 */
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83 public bool containsKey(Object key) {
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84 return map.containsKey(key);
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85 }
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86
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87 /**
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88 * @return the number of key/value pairs
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89 */
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90 public int size() {
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91 return map.size();
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92 }
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93 }
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