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1 /* |
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2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * |
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16 */ |
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17 using System; |
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18 using System.IO; |
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19 using System.Text; |
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20 using System.Threading; |
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21 using System.Collections; |
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22 |
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23 namespace SymbianUtils |
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24 { |
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25 public class AsyncTextReaderFilterCollection : IEnumerable |
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26 { |
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27 #region Enumerations |
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28 public enum TCombinationType |
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29 { |
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30 ECombinationTypeUndefined = 0, |
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31 ECombinationTypeOR, |
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32 ECombinationTypeAND, |
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33 ECombinationTypeNOT |
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34 } |
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35 #endregion |
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36 |
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37 #region Constructors |
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38 public AsyncTextReaderFilterCollection() |
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39 { |
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40 } |
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41 #endregion |
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42 |
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43 #region API - Filter processing |
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44 public bool ProcessFilters( ref string aLine ) |
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45 { |
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46 bool propagateLine = false; |
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47 // |
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48 if ( aLine.Length > 0 ) |
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49 { |
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50 int matchCount = 0; |
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51 int filterCount = Count; |
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52 |
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53 // First phase: check for filter matches |
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54 for ( int i = 0; i < filterCount; i++ ) |
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55 { |
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56 AsyncTextReaderFilter filter = this[ i ]; |
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57 // |
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58 bool matchedFilter = filter.Matches( aLine ); |
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59 if ( matchedFilter ) |
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60 { |
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61 ++matchCount; |
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62 } |
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63 } |
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64 |
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65 // Second phase: check for overall match against combined |
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66 // criteria. |
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67 propagateLine = ( filterCount == 0 ); // Default to true when no filters |
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68 switch ( CombinationType ) |
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69 { |
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70 case TCombinationType.ECombinationTypeOR: |
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71 propagateLine = ( matchCount > 0 ); |
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72 break; |
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73 case TCombinationType.ECombinationTypeAND: |
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74 propagateLine = ( matchCount == filterCount ); |
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75 break; |
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76 case TCombinationType.ECombinationTypeNOT: |
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77 propagateLine = ( matchCount == 0 ); |
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78 break; |
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79 default: |
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80 case TCombinationType.ECombinationTypeUndefined: |
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81 break; |
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82 } |
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83 |
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84 // Third phase: process filter |
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85 if ( propagateLine ) |
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86 { |
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87 for ( int i = 0; i < filterCount; i++ ) |
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88 { |
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89 AsyncTextReaderFilter filter = this[ i ]; |
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90 filter.Process( ref aLine ); |
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91 } |
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92 } |
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93 } |
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94 |
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95 return propagateLine; |
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96 } |
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97 #endregion |
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98 |
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99 #region API - Filter management |
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100 public void Add( AsyncTextReaderFilter aFilter ) |
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101 { |
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102 iFilters.Add( aFilter ); |
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103 } |
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104 |
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105 public void RemoveAt( int aIndex ) |
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106 { |
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107 iFilters.RemoveAt( aIndex ); |
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108 } |
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109 |
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110 public void Remove( AsyncTextReaderFilter aFilter ) |
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111 { |
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112 iFilters.Remove( aFilter ); |
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113 } |
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114 |
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115 public void Clear() |
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116 { |
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117 iFilters.Clear(); |
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118 } |
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119 |
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120 #endregion |
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121 |
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122 #region Properties |
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123 public int Count |
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124 { |
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125 get { return iFilters.Count; } |
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126 } |
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127 |
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128 public AsyncTextReaderFilter this[ int aIndex ] |
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129 { |
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130 get { return (AsyncTextReaderFilter) iFilters[ aIndex ]; } |
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131 } |
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132 |
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133 public TCombinationType CombinationType |
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134 { |
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135 get { return iCombinationType; } |
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136 set { iCombinationType = value; } |
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137 } |
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138 #endregion |
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139 |
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140 #region IEnumerable Members |
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141 public IEnumerator GetEnumerator() |
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142 { |
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143 return new AsyncTextReaderFilterCollectionEnumerator( this ); |
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144 } |
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145 #endregion |
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146 |
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147 #region Data members |
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148 private TCombinationType iCombinationType = TCombinationType.ECombinationTypeUndefined; |
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149 private ArrayList iFilters = new ArrayList(); |
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150 #endregion |
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151 } |
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152 } |