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 @ 44154
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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 | 43020 | jjdelcerro | * This program is free software; you can redistribute it and/or modify it under
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7 | * the terms of the GNU General Public License as published by the Free Software
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8 | * Foundation; either version 3 of the License, or (at your option) any later
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9 | * version.
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10 | 40559 | jjdelcerro | *
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11 | 43020 | jjdelcerro | * This program is distributed in the hope that it will be useful, but WITHOUT
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12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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13 | * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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14 | * details.
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15 | 40559 | jjdelcerro | *
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16 | 43020 | jjdelcerro | * You should have received a copy of the GNU General Public License along with
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17 | * this program; if not, write to the Free Software Foundation, Inc., 51
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18 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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19 | 40559 | jjdelcerro | *
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20 | 43020 | jjdelcerro | * For any additional information, do not hesitate to contact us at info AT
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21 | * gvsig.com, or visit our website www.gvsig.com.
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22 | 40559 | jjdelcerro | */
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23 | 40435 | jjdelcerro | package org.gvsig.fmap.dal.feature; |
24 | |||
25 | import java.util.ArrayList; |
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26 | import java.util.Comparator; |
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27 | import java.util.Iterator; |
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28 | import java.util.List; |
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29 | 43020 | jjdelcerro | import java.util.NoSuchElementException; |
30 | 43987 | jjdelcerro | import org.apache.commons.lang3.StringUtils; |
31 | 40435 | jjdelcerro | |
32 | import org.gvsig.fmap.dal.exception.DataEvaluatorRuntimeException; |
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33 | import org.gvsig.tools.evaluator.Evaluator; |
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34 | import org.gvsig.tools.evaluator.EvaluatorData; |
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35 | import org.gvsig.tools.evaluator.EvaluatorException; |
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36 | import org.gvsig.tools.lang.Cloneable; |
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37 | import org.gvsig.tools.persistence.Persistent; |
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38 | import org.gvsig.tools.persistence.PersistentState; |
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39 | import org.gvsig.tools.persistence.exception.PersistenceException; |
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40 | |||
41 | 43026 | jjdelcerro | public class FeatureQueryOrder implements Persistent, Cloneable { |
42 | 40435 | jjdelcerro | |
43 | 43026 | jjdelcerro | public class FeatureQueryOrderMember implements Persistent, org.gvsig.tools.lang.Cloneable { |
44 | |||
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 | |||
54 | FeatureQueryOrderMember(Evaluator evaluator, boolean ascending) {
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55 | this.evaluator = evaluator;
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56 | this.ascending = ascending;
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57 | } |
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58 | |||
59 | public boolean hasEvaluator() { |
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60 | return this.evaluator != null; |
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61 | } |
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62 | |||
63 | public Evaluator getEvaluator() {
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64 | return this.evaluator; |
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65 | } |
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66 | |||
67 | public boolean getAscending() { |
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68 | return this.ascending; |
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69 | } |
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70 | |||
71 | public String getAttributeName() { |
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72 | return this.attributeName; |
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73 | } |
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74 | |||
75 | @Override
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76 | public void loadFromState(PersistentState state) |
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77 | throws PersistenceException {
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78 | this.attributeName = state.getString("attributeName"); |
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79 | this.ascending = state.getBoolean("ascending"); |
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80 | this.evaluator = (Evaluator) state.get("evaluator"); |
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81 | } |
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82 | |||
83 | @Override
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84 | public void saveToState(PersistentState state) |
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85 | throws PersistenceException {
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86 | state.set("attributeName", this.attributeName); |
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87 | state.set("ascending", this.ascending); |
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88 | if (this.evaluator != null) { |
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89 | state.set("evaluator", evaluator);
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90 | } |
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91 | |||
92 | } |
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93 | |||
94 | @Override
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95 | public FeatureQueryOrderMember clone() throws CloneNotSupportedException { |
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96 | // Nothing more to clone
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97 | return (FeatureQueryOrderMember) super.clone(); |
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98 | } |
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99 | |||
100 | } |
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101 | |||
102 | 43020 | jjdelcerro | private List members = new ArrayList(); |
103 | 40435 | jjdelcerro | |
104 | 43026 | jjdelcerro | public FeatureQueryOrder() {
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105 | } |
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106 | |||
107 | 43987 | jjdelcerro | public Object add(String order) { |
108 | if( StringUtils.isEmpty(order) ) {
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109 | return null; |
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110 | } |
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111 | Object r = null; |
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112 | String[] attributes = StringUtils.split(order, ','); |
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113 | for (String attribute : attributes) { |
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114 | boolean ascending = true; |
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115 | if( attribute.startsWith("+") ) { |
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116 | ascending = true;
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117 | attribute = attribute.substring(1);
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118 | } else if( attribute.startsWith("-") ) { |
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119 | ascending = false;
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120 | attribute = attribute.substring(1);
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121 | } |
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122 | attribute = attribute.trim(); |
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123 | r = this.add(attribute,ascending);
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124 | } |
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125 | return r;
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126 | } |
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127 | |||
128 | 43020 | jjdelcerro | public Object add(String attributeName, boolean ascending) { |
129 | 40435 | jjdelcerro | FeatureQueryOrderMember member = new FeatureQueryOrderMember(
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130 | attributeName, ascending); |
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131 | 43020 | jjdelcerro | if (members.add(member)) {
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132 | return member;
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133 | } |
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134 | return null; |
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135 | } |
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136 | 40435 | jjdelcerro | |
137 | 43020 | jjdelcerro | public Object add(Evaluator evaluator, boolean ascending) { |
138 | FeatureQueryOrderMember member = new FeatureQueryOrderMember(
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139 | evaluator, |
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140 | ascending); |
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141 | if (members.add(member)) {
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142 | return member;
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143 | } |
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144 | return null; |
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145 | } |
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146 | 40435 | jjdelcerro | |
147 | 43026 | jjdelcerro | public Iterable<FeatureQueryOrderMember> members() { |
148 | // Me hubiese gustado que FeatureQueryOrder fuese Iterable, pero no se deja por
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149 | // que FeatureQueryOrderMember es una clase interna y no esta definida en el
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150 | // momento de poner el :
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151 | // implements Iterable<FeatureQueryOrderMember>
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152 | // Y si saco a una clase independiente FeatureQueryOrderMember se pierde
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153 | // compatibilidad binaria con quien la esta usando.
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154 | // Para rodearlo, he creado el metodo members.
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155 | return new Iterable<FeatureQueryOrderMember> () { |
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156 | |||
157 | @Override
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158 | public Iterator<FeatureQueryOrderMember> iterator() { |
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159 | return FeatureQueryOrder.this.iterator();
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160 | } |
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161 | }; |
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162 | } |
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163 | |||
164 | 43020 | jjdelcerro | public Iterator<FeatureQueryOrderMember> iterator() { |
165 | 43026 | jjdelcerro | if (members == null) { |
166 | 43020 | jjdelcerro | return new Iterator<FeatureQueryOrderMember>() { |
167 | @Override
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168 | public boolean hasNext() { |
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169 | return false; |
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170 | } |
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171 | 40435 | jjdelcerro | |
172 | 43020 | jjdelcerro | @Override
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173 | public FeatureQueryOrderMember next() {
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174 | throw new NoSuchElementException(); |
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175 | } |
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176 | 40435 | jjdelcerro | |
177 | 43020 | jjdelcerro | @Override
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178 | public void remove() { |
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179 | throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
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180 | } |
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181 | }; |
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182 | } |
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183 | return members.iterator();
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184 | } |
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185 | 40435 | jjdelcerro | |
186 | 43020 | jjdelcerro | public boolean remove(FeatureQueryOrderMember member) { |
187 | return members.remove(member);
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188 | } |
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189 | 40435 | jjdelcerro | |
190 | 43020 | jjdelcerro | public void remove(int index) { |
191 | members.remove(index); |
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192 | } |
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193 | 40435 | jjdelcerro | |
194 | 43020 | jjdelcerro | public void clear() { |
195 | members.clear(); |
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196 | } |
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197 | 40435 | jjdelcerro | |
198 | 43020 | jjdelcerro | public int size() { |
199 | return this.members.size(); |
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200 | } |
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201 | 40435 | jjdelcerro | |
202 | 43020 | jjdelcerro | public Comparator getFeatureComparator() { |
203 | return new DefaultFeatureComparator(this); |
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204 | } |
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205 | 40435 | jjdelcerro | |
206 | 43020 | jjdelcerro | public Object clone() throws CloneNotSupportedException { |
207 | FeatureQueryOrder clone = (FeatureQueryOrder) super.clone();
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208 | 40435 | jjdelcerro | |
209 | 43020 | jjdelcerro | if (members != null) { |
210 | clone.members = new ArrayList(members.size()); |
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211 | for (int i = 0; i < members.size(); i++) { |
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212 | clone.members.add(((Cloneable) members.get(i)).clone());
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213 | } |
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214 | } |
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215 | 40435 | jjdelcerro | |
216 | 43020 | jjdelcerro | return clone;
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217 | } |
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218 | 40435 | jjdelcerro | |
219 | 43020 | jjdelcerro | public FeatureQueryOrder getCopy() {
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220 | FeatureQueryOrder aCopy = new FeatureQueryOrder();
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221 | Iterator iter = this.members.iterator(); |
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222 | FeatureQueryOrderMember member; |
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223 | while (iter.hasNext()) {
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224 | member = (FeatureQueryOrderMember) iter.next(); |
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225 | if (member.hasEvaluator()) {
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226 | aCopy.add(member.getEvaluator(), member.getAscending()); |
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227 | } else {
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228 | aCopy.add(member.getAttributeName(), member.getAscending()); |
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229 | } |
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230 | } |
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231 | return aCopy;
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232 | } |
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233 | 40435 | jjdelcerro | |
234 | 43020 | jjdelcerro | public void loadFromState(PersistentState state) |
235 | throws PersistenceException {
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236 | this.members = (List) state.get("menbers"); |
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237 | } |
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238 | 40435 | jjdelcerro | |
239 | 43020 | jjdelcerro | public void saveToState(PersistentState state) throws PersistenceException { |
240 | state.set("menbers", members);
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241 | } |
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242 | 40435 | jjdelcerro | |
243 | 43020 | jjdelcerro | private class DefaultFeatureComparator implements Comparator { |
244 | 40435 | jjdelcerro | |
245 | 43020 | jjdelcerro | private FeatureQueryOrder order;
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246 | 40435 | jjdelcerro | |
247 | 43020 | jjdelcerro | public DefaultFeatureComparator(FeatureQueryOrder order) {
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248 | this.order = order;
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249 | // TODO optimizar en un array???
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250 | 40435 | jjdelcerro | |
251 | 43020 | jjdelcerro | } |
252 | 40435 | jjdelcerro | |
253 | 43020 | jjdelcerro | private int myCompare(Object arg0, Object arg1) { |
254 | if (arg0 == null) { |
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255 | if (arg1 == null) { |
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256 | return 0; |
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257 | } else {
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258 | return 1; |
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259 | } |
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260 | } else if (arg1 == null) { |
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261 | if (arg0 == null) { |
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262 | return 0; |
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263 | } else {
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264 | return 1; |
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265 | } |
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266 | } |
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267 | if (arg0 instanceof Comparable) { |
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268 | return ((Comparable) arg0).compareTo(arg1); |
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269 | } else if (arg1 instanceof Comparable) { |
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270 | return ((Comparable) arg1).compareTo(arg0) * -1; |
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271 | } |
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272 | 40435 | jjdelcerro | |
273 | 43020 | jjdelcerro | if (arg0.equals(arg1)) {
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274 | return 0; |
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275 | } else {
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276 | return -1; |
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277 | } |
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278 | 40435 | jjdelcerro | |
279 | 43020 | jjdelcerro | } |
280 | 40435 | jjdelcerro | |
281 | 43020 | jjdelcerro | public int compare(Object arg0, Object arg1) { |
282 | Iterator iter = this.order.iterator(); |
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283 | int returnValue = 0; |
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284 | Feature f0 = (Feature) arg0; |
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285 | Feature f1 = (Feature) arg1; |
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286 | Object item;
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287 | String attrName;
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288 | Evaluator evaluator; |
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289 | while (returnValue == 0 && iter.hasNext()) { |
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290 | item = iter.next(); |
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291 | if (item instanceof String) { |
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292 | attrName = (String) item;
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293 | returnValue = this
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294 | .myCompare(f0.get(attrName), f1 |
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295 | .get(attrName)); |
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296 | } else {
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297 | evaluator = (Evaluator) item; |
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298 | try {
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299 | returnValue = this.myCompare(evaluator
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300 | .evaluate((EvaluatorData) f0), evaluator |
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301 | .evaluate((EvaluatorData) f1)); |
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302 | } catch (EvaluatorException e) {
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303 | throw new DataEvaluatorRuntimeException(e); |
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304 | } |
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305 | } |
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306 | } |
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307 | 40435 | jjdelcerro | |
308 | 43020 | jjdelcerro | return returnValue;
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309 | } |
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310 | 40435 | jjdelcerro | |
311 | 43020 | jjdelcerro | } |
312 | |||
313 | } |