svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.db / org.gvsig.fmap.dal.db.jdbc / src / main / java / org / gvsig / fmap / dal / store / jdbc / JDBCIterator.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 | /* gvSIG. Geographic Information System of the Valencian Government
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25 | *
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26 | * Copyright (C) 2007-2008 Infrastructures and Transports Department
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27 | * of the Valencian Government (CIT)
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28 | *
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29 | * This program is free software; you can redistribute it and/or
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30 | * modify it under the terms of the GNU General Public License
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31 | * as published by the Free Software Foundation; either version 2
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32 | * of the License, or (at your option) any later version.
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33 | *
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34 | * This program is distributed in the hope that it will be useful,
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35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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37 | * GNU General Public License for more details.
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38 | *
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39 | * You should have received a copy of the GNU General Public License
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40 | * along with this program; if not, write to the Free Software
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41 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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42 | * MA 02110-1301, USA.
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43 | *
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44 | */
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45 | |||
46 | /*
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47 | * AUTHORS (In addition to CIT):
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48 | * 2009 IVER T.I {{Task}}
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49 | */
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50 | |||
51 | package org.gvsig.fmap.dal.store.jdbc; |
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52 | |||
53 | import java.util.NoSuchElementException; |
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54 | |||
55 | import org.gvsig.fmap.dal.exception.DataException; |
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56 | import org.gvsig.fmap.dal.exception.OpenException; |
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57 | import org.gvsig.fmap.dal.feature.FeatureType; |
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58 | import org.gvsig.fmap.dal.feature.spi.AbstractFeatureProviderIterator; |
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59 | import org.gvsig.fmap.dal.feature.spi.FeatureProvider; |
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60 | import org.gvsig.tools.exception.BaseException; |
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61 | |||
62 | /**
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63 | * @author jmvivo
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64 | *
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65 | */
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66 | public class JDBCIterator extends AbstractFeatureProviderIterator { |
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67 | |||
68 | protected int resultSetID; |
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69 | protected Boolean hasNext = null; |
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70 | protected FeatureType featureType;
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71 | protected JDBCSetProvider set;
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72 | |||
73 | protected JDBCIterator(JDBCStoreProvider store, JDBCSetProvider set,
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74 | FeatureType featureType, |
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75 | int resulsetID) throws DataException { |
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76 | super(store);
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77 | this.resultSetID = resulsetID;
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78 | this.featureType = featureType;
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79 | this.set = set;
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80 | this.hasNext = null; |
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81 | if (this.set != null && resulsetID >= 0){ |
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82 | this.set.addResulsetReference(resulsetID);
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83 | } |
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84 | } |
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85 | |||
86 | private JDBCStoreProvider getJDBCStoreProvider() {
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87 | return (JDBCStoreProvider) getFeatureStoreProvider();
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88 | } |
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89 | |||
90 | public final Object next() { |
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91 | try {
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92 | getDataStoreProvider().open(); |
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93 | } catch (OpenException e) {
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94 | throw new RuntimeException(e); |
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95 | } |
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96 | return internalNext();
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97 | } |
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98 | |||
99 | public final boolean hasNext() { |
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100 | return internalHasNext();
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101 | } |
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102 | |||
103 | @Override
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104 | protected boolean internalHasNext() { |
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105 | if (hasNext == null) { |
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106 | try {
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107 | if (getJDBCStoreProvider().resulsetNext(resultSetID)) {
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108 | hasNext = Boolean.TRUE;
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109 | } else {
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110 | hasNext = Boolean.FALSE;
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111 | this.close();
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112 | } |
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113 | } catch (DataException e) {
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114 | // FIXME Exception
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115 | throw new RuntimeException(e); |
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116 | } |
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117 | } |
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118 | return hasNext.booleanValue();
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119 | } |
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120 | |||
121 | @Override
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122 | protected Object internalNext() { |
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123 | if (!hasNext()) {
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124 | throw new NoSuchElementException(); |
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125 | } |
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126 | FeatureProvider data; |
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127 | try {
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128 | data = getFeatureProvider(); |
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129 | } catch (DataException e) {
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130 | // FIXME Exception
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131 | throw new RuntimeException(e); |
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132 | } |
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133 | hasNext = null;
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134 | return data;
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135 | } |
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136 | |||
137 | public void remove() { |
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138 | throw new UnsupportedOperationException(); |
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139 | } |
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140 | |||
141 | protected FeatureProvider createFeatureProvider() throws DataException { |
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142 | return getFeatureStoreProvider().createFeatureProvider(featureType);
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143 | } |
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144 | |||
145 | protected FeatureProvider getFeatureProvider() throws DataException { |
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146 | FeatureProvider data = createFeatureProvider(); |
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147 | getJDBCStoreProvider().loadFeatureProvider(data, resultSetID); |
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148 | return data;
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149 | } |
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150 | |||
151 | @Override
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152 | protected void doDispose() throws BaseException { |
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153 | if (resultSetID >= 0){ |
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154 | this.close();
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155 | } |
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156 | this.featureType = null; |
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157 | } |
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158 | |||
159 | protected void close() { |
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160 | try {
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161 | this.set.removeResulsetReference(resultSetID);
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162 | getJDBCStoreProvider().closeResulset(resultSetID); |
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163 | resultSetID = -1;
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164 | } catch (DataException e) {
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165 | throw new RuntimeException(e); |
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166 | } |
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167 | } |
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168 | |||
169 | } |