svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.api / src / main / java / org / gvsig / fmap / dal / feature / FeatureQueryOrder.java @ 40559
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1 | 40559 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | *
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4 | * Copyright (C) 2007-2013 gvSIG Association.
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5 | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | * as published by the Free Software Foundation; either version 3
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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21 | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | */
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24 | 40435 | jjdelcerro | package org.gvsig.fmap.dal.feature; |
25 | |||
26 | import java.util.ArrayList; |
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27 | import java.util.Comparator; |
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28 | import java.util.Iterator; |
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29 | import java.util.List; |
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30 | |||
31 | import org.gvsig.fmap.dal.exception.DataEvaluatorRuntimeException; |
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32 | import org.gvsig.tools.evaluator.Evaluator; |
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33 | import org.gvsig.tools.evaluator.EvaluatorData; |
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34 | import org.gvsig.tools.evaluator.EvaluatorException; |
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35 | import org.gvsig.tools.lang.Cloneable; |
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36 | import org.gvsig.tools.persistence.Persistent; |
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37 | import org.gvsig.tools.persistence.PersistentState; |
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38 | import org.gvsig.tools.persistence.exception.PersistenceException; |
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39 | |||
40 | public class FeatureQueryOrder implements Persistent, Cloneable { |
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41 | |||
42 | private List members = new ArrayList(); |
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43 | |||
44 | public class FeatureQueryOrderMember implements Persistent, Cloneable { |
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45 | String attributeName = null; |
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46 | Evaluator evaluator = null;
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47 | boolean ascending;
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48 | |||
49 | FeatureQueryOrderMember(String attributeName, boolean ascending) { |
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50 | this.attributeName = attributeName;
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51 | this.ascending = ascending;
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52 | } |
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53 | FeatureQueryOrderMember(Evaluator evaluator, boolean ascending) {
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54 | this.evaluator = evaluator;
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55 | this.ascending = ascending;
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56 | } |
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57 | public boolean hasEvaluator() { |
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58 | return this.evaluator != null; |
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59 | } |
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60 | public Evaluator getEvaluator() {
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61 | return this.evaluator; |
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62 | } |
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63 | public boolean getAscending() { |
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64 | return this.ascending; |
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65 | } |
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66 | public String getAttributeName() { |
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67 | return this.attributeName; |
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68 | } |
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69 | public void loadFromState(PersistentState state) |
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70 | throws PersistenceException {
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71 | this.attributeName = state.getString("attributeName"); |
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72 | this.ascending = state.getBoolean("ascending"); |
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73 | this.evaluator = (Evaluator) state.get("evaluator"); |
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74 | } |
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75 | |||
76 | public void saveToState(PersistentState state) |
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77 | throws PersistenceException {
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78 | state.set("attributeName", this.attributeName); |
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79 | state.set("ascending", this.ascending); |
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80 | if (this.evaluator != null) { |
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81 | state.set("evaluator", evaluator);
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82 | } |
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83 | |||
84 | } |
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85 | |||
86 | public Object clone() throws CloneNotSupportedException { |
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87 | // Nothing more to clone
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88 | return super.clone(); |
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89 | } |
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90 | } |
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91 | |||
92 | public Object add(String attributeName, boolean ascending) { |
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93 | FeatureQueryOrderMember member = new FeatureQueryOrderMember(
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94 | attributeName, ascending); |
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95 | if( members.add(member) ) {
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96 | return member;
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97 | } |
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98 | return null; |
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99 | } |
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100 | |||
101 | public Object add(Evaluator evaluator, boolean ascending) { |
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102 | FeatureQueryOrderMember member = new FeatureQueryOrderMember(
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103 | evaluator, |
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104 | ascending); |
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105 | if (members.add(member)) {
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106 | return member;
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107 | } |
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108 | return null; |
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109 | } |
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110 | |||
111 | public Iterator iterator() { |
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112 | return members.iterator();
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113 | } |
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114 | |||
115 | public boolean remove(FeatureQueryOrderMember member) { |
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116 | return members.remove(member);
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117 | } |
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118 | |||
119 | public void remove(int index) { |
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120 | members.remove(index); |
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121 | } |
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122 | |||
123 | public void clear() { |
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124 | members.clear(); |
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125 | } |
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126 | |||
127 | public int size() { |
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128 | return this.members.size(); |
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129 | } |
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130 | |||
131 | public Comparator getFeatureComparator() { |
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132 | return new DefaultFeatureComparator(this); |
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133 | } |
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134 | |||
135 | public Object clone() throws CloneNotSupportedException { |
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136 | FeatureQueryOrder clone = (FeatureQueryOrder) super.clone();
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137 | |||
138 | if (members != null) { |
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139 | clone.members = new ArrayList(members.size()); |
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140 | for (int i = 0; i < members.size(); i++) { |
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141 | clone.members.add(((Cloneable) members.get(i)).clone());
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142 | } |
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143 | } |
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144 | |||
145 | return clone;
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146 | } |
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147 | |||
148 | public FeatureQueryOrder getCopy() {
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149 | FeatureQueryOrder aCopy = new FeatureQueryOrder();
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150 | Iterator iter = this.members.iterator(); |
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151 | FeatureQueryOrderMember member; |
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152 | while (iter.hasNext()) {
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153 | member = (FeatureQueryOrderMember) iter.next(); |
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154 | if (member.hasEvaluator()) {
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155 | aCopy.add(member.getEvaluator(), member.getAscending()); |
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156 | } else {
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157 | aCopy.add(member.getAttributeName(), member.getAscending()); |
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158 | } |
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159 | } |
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160 | return aCopy;
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161 | } |
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162 | |||
163 | public void loadFromState(PersistentState state) |
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164 | throws PersistenceException {
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165 | this.members = (List) state.get("menbers"); |
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166 | } |
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167 | |||
168 | public void saveToState(PersistentState state) throws PersistenceException { |
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169 | state.set("menbers", members);
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170 | } |
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171 | |||
172 | private class DefaultFeatureComparator implements Comparator { |
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173 | |||
174 | private FeatureQueryOrder order;
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175 | |||
176 | |||
177 | public DefaultFeatureComparator(FeatureQueryOrder order) {
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178 | this.order = order;
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179 | // TODO optimizar en un array???
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180 | |||
181 | } |
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182 | |||
183 | |||
184 | private int myCompare(Object arg0, Object arg1) { |
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185 | if (arg0 == null){ |
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186 | if (arg1 == null){ |
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187 | return 0; |
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188 | } else{
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189 | return 1; |
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190 | } |
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191 | } else if (arg1 == null){ |
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192 | if (arg0 == null) { |
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193 | return 0; |
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194 | } else {
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195 | return 1; |
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196 | } |
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197 | } |
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198 | if (arg0 instanceof Comparable) { |
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199 | return ((Comparable) arg0).compareTo(arg1); |
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200 | } else if (arg1 instanceof Comparable) { |
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201 | return ((Comparable) arg1).compareTo(arg0) * -1; |
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202 | } |
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203 | |||
204 | if (arg0.equals(arg1)){
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205 | return 0; |
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206 | } else{
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207 | return -1; |
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208 | } |
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209 | |||
210 | } |
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211 | |||
212 | public int compare(Object arg0, Object arg1) { |
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213 | Iterator iter = this.order.iterator(); |
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214 | int returnValue = 0; |
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215 | Feature f0 = (Feature) arg0; |
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216 | Feature f1 = (Feature) arg1; |
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217 | Object item;
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218 | String attrName;
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219 | Evaluator evaluator; |
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220 | while (returnValue == 0 && iter.hasNext()) { |
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221 | item = iter.next(); |
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222 | if (item instanceof String) { |
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223 | attrName = (String) item;
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224 | returnValue = this
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225 | .myCompare(f0.get(attrName), f1 |
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226 | .get(attrName)); |
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227 | } else {
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228 | evaluator = (Evaluator) item; |
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229 | try {
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230 | returnValue = this.myCompare(evaluator
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231 | .evaluate((EvaluatorData) f0), evaluator |
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232 | .evaluate((EvaluatorData) f1)); |
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233 | } catch (EvaluatorException e) {
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234 | throw new DataEvaluatorRuntimeException(e); |
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235 | } |
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236 | } |
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237 | } |
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238 | |||
239 | return returnValue;
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240 | } |
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241 | |||
242 | } |
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243 | |||
244 | } |