svn-gvsig-desktop / tags / v2_0_0_Build_2021 / libraries / libRemoteServices / src / org / gvsig / remoteclient / wfs / WFSClient.java @ 34101
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1 | 29650 | jpiera | package org.gvsig.remoteclient.wfs; |
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2 | 4887 | jorpiell | |
3 | 5368 | jorpiell | import java.io.File; |
4 | 4887 | jorpiell | import java.io.IOException; |
5 | import java.net.ConnectException; |
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6 | 31835 | jpiera | import java.util.ArrayList; |
7 | 4887 | jorpiell | import java.util.Hashtable; |
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9 | 33738 | jpiera | import org.gvsig.compat.net.ICancellable; |
10 | 29650 | jpiera | import org.gvsig.remoteclient.RemoteClient; |
11 | import org.gvsig.remoteclient.wfs.exceptions.WFSException; |
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12 | 4887 | jorpiell | |
13 | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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14 | *
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15 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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16 | *
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17 | * This program is free software; you can redistribute it and/or
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18 | * modify it under the terms of the GNU General Public License
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19 | * as published by the Free Software Foundation; either version 2
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20 | * of the License, or (at your option) any later version.
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21 | *
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22 | * This program is distributed in the hope that it will be useful,
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23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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25 | * GNU General Public License for more details.
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26 | *
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27 | * You should have received a copy of the GNU General Public License
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28 | * along with this program; if not, write to the Free Software
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29 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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30 | *
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31 | * For more information, contact:
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32 | *
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33 | * Generalitat Valenciana
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34 | * Conselleria d'Infraestructures i Transport
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35 | * Av. Blasco Ib??ez, 50
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36 | * 46010 VALENCIA
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37 | * SPAIN
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38 | *
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39 | * +34 963862235
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40 | * gvsig@gva.es
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41 | * www.gvsig.gva.es
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42 | *
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43 | * or
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44 | *
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45 | * IVER T.I. S.A
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46 | * Salamanca 50
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47 | * 46005 Valencia
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48 | * Spain
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49 | *
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50 | * +34 963163400
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51 | * dac@iver.es
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52 | */
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53 | /* CVS MESSAGES:
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54 | *
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55 | * $Id$
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56 | * $Log$
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57 | 13912 | jaume | * Revision 1.10 2007-09-20 09:30:12 jaume
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58 | * removed unnecessary imports
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59 | *
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60 | * Revision 1.9 2007/02/09 14:11:01 jorpiell
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61 | 10246 | jorpiell | * Primer piloto del soporte para WFS 1.1 y para WFS-T
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62 | *
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63 | * Revision 1.8 2006/06/14 08:46:07 jorpiell
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64 | 5830 | jorpiell | * Se tiene en cuanta la opcion para refrescar las capabilities
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65 | *
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66 | * Revision 1.7 2006/05/25 10:28:25 jorpiell
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67 | 5431 | jorpiell | * Se ha a?adido un atributo al m?todo connect
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68 | *
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69 | * Revision 1.6 2006/05/23 13:23:22 jorpiell
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70 | 5368 | jorpiell | * Se ha cambiado el final del bucle de parseado y se tiene en cuenta el online resource
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71 | 5132 | jaume | *
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72 | * Revision 1.4 2006/04/20 16:39:16 jorpiell
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73 | 4912 | jorpiell | * A?adida la operacion de describeFeatureType y el parser correspondiente.
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74 | *
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75 | * Revision 1.3 2006/04/19 12:51:35 jorpiell
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76 | 4887 | jorpiell | * A?adidas algunas de las clases del servicio WFS
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77 | *
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78 | *
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79 | */
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80 | /**
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81 | * Represents the class the with the necessary logic to connect to a
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82 | * OGCWFS and interpretate the data
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83 | * @author Jorge Piera Llodr? (piera_jor@gva.es)
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84 | */
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85 | public class WFSClient extends RemoteClient{ |
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86 | private WFSProtocolHandler handler;
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87 | 5368 | jorpiell | |
88 | 31835 | jpiera | |
89 | 4887 | jorpiell | /**
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90 | * Constructor.
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91 | * the parameter host, indicates the WFS host to connect.
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92 | * @throws ConnectException,IOException
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93 | *
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94 | */
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95 | public WFSClient(String host) throws ConnectException,IOException { |
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96 | setHost(host); |
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97 | |||
98 | try {
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99 | handler = WFSProtocolHandlerFactory.negotiate(host); |
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100 | handler.setHost(host); |
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101 | } catch(ConnectException conE) { |
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102 | conE.printStackTrace(); |
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103 | throw conE;
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104 | } catch(IOException ioE) { |
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105 | ioE.printStackTrace(); |
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106 | throw ioE;
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107 | } catch(Exception e) { |
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108 | e.printStackTrace(); |
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109 | } |
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110 | } |
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111 | |||
112 | 28430 | jpiera | public WFSClient(String host, String version) throws IOException { |
113 | 27881 | jpiera | setHost(host); |
114 | |||
115 | 28430 | jpiera | if (version == null){ |
116 | try {
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117 | handler = WFSProtocolHandlerFactory.negotiate(host); |
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118 | } catch(ConnectException conE) { |
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119 | conE.printStackTrace(); |
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120 | throw conE;
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121 | } catch(IOException ioE) { |
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122 | ioE.printStackTrace(); |
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123 | throw ioE;
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124 | } catch(Exception e) { |
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125 | e.printStackTrace(); |
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126 | } |
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127 | }else{
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128 | handler = WFSProtocolHandlerFactory.createVersionDriver(version); |
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129 | } |
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130 | 27881 | jpiera | |
131 | if (handler == null){ |
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132 | throw new UnsupportedOperationException("Unsupported version"); |
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133 | } |
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134 | handler.setHost(host); |
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135 | } |
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136 | |||
137 | 4887 | jorpiell | /**
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138 | 5368 | jorpiell | * Every OGC Web Service (OWS), including a Web Feature Service,
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139 | * must have the ability to describe its capabilities by returning
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140 | * service metadata in response to a GetCapabilities request.
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141 | * @param status
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142 | * WFS client status. Contains all the information to create
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143 | * the query
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144 | */
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145 | 18271 | jpiera | public void getCapabilities(WFSStatus status, boolean override, ICancellable cancel)throws WFSException { |
146 | 5830 | jorpiell | handler.getCapabilities(status,override,cancel); |
147 | 5368 | jorpiell | } |
148 | |||
149 | /**
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150 | * The function of the DescribeFeatureType operation is to
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151 | * generate a schema description of feature types serviced
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152 | * by a WFS implementation. The schema descriptions define
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153 | * how a WFS implementation expects feature instances to
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154 | * be encoded on input (via Insert and Update requests)
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155 | * and how feature instances will be generated on output
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156 | * (in response to GetFeature and GetGmlObject requests).
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157 | * @param status
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158 | * WFS client status. Contains all the information to create
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159 | * the query
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160 | */
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161 | 27881 | jpiera | public void describeFeatureType(WFSStatus status, boolean override, ICancellable cancel)throws WFSException { |
162 | handler.describeFeatureType(status,override,cancel); |
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163 | 5368 | jorpiell | } |
164 | |||
165 | /**
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166 | * The GetFeature operation allows retrieval of features from a
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167 | * web feature service. A GetFeature request is processed by
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168 | * a WFS and when the value of the outputFormat attribute is
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169 | * set to text/gml a GML instance document, containing the
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170 | * result set, is returned to the client.
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171 | * @param status
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172 | * WFS client status. Contains all the information to create
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173 | * the query
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174 | * @return File
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175 | * GML File
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176 | */
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177 | 27881 | jpiera | public File getFeature(WFSStatus status, boolean override, ICancellable cancel) throws WFSException{ |
178 | return handler.getFeature(status,override,cancel);
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179 | 5368 | jorpiell | } |
180 | |||
181 | /**
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182 | 10246 | jorpiell | * The Transaction operation is used to describe data transformation
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183 | * operations that are to be applied to web accessible feature
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184 | * instances. A web feature service may process a Transaction
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185 | * operation directly or possibly translate it into the language
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186 | * of a target datastore to which it is connected and then have the
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187 | * datastore execute the transaction. When the transaction has been
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188 | * completed, a web feature service will generate an XML response
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189 | * document indicating the completion status of the transaction.
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190 | * @param status
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191 | * WFS client status. Contains all the information to create
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192 | * the query
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193 | */
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194 | 27881 | jpiera | public void transaction(WFSStatus status, boolean override, ICancellable cancel) throws WFSException{ |
195 | handler.transaction(status,override,cancel); |
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196 | 10246 | jorpiell | } |
197 | |||
198 | /**
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199 | * Web connections are inherently stateless. As a consequence
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200 | * of this, the semantics of serializable transactions are not
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201 | * preserved. To understand the issue, consider an update operation.
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202 | * The client fetches a feature instance. The feature is then
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203 | * modified on the client side, and submitted back to the database
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204 | * via a Transaction request for update. Serializability is lost
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205 | * since there is nothing to guarantee that while the feature was
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206 | * being modified on the client side, another client did not come
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207 | * along and update that same feature in the database.
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208 | * One way to ensure serializability is to require that access to
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209 | * data be done in a mutually exclusive manner; that is while one
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210 | * transaction accesses a data item, no other transaction can modify
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211 | * the same data item. This can be accomplished by using locks that
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212 | * control access to the data.
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213 | * The purpose of the LockFeature operation is to expose a long
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214 | * term feature locking mechanism to ensure consistency. The lock
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215 | * is considered long term because network latency would make
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216 | * feature locks last relatively longer than native commercial
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217 | * database locks.
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218 | * The LockFeature operation is optional and does not need to be
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219 | * implemented for a WFS implementation to conform to this
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220 | * specification. If a WFS implements the LockFeature operation,
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221 | * this fact must be advertised in the capabilities document
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222 | * @param status
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223 | */
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224 | 27881 | jpiera | public void lockFeature(WFSStatus status, boolean override, ICancellable cancel)throws WFSException { |
225 | handler.lockFeature(status,override,cancel); |
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226 | 10246 | jorpiell | } |
227 | |||
228 | 27881 | jpiera | |
229 | 10246 | jorpiell | /**
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230 | 4887 | jorpiell | * <p>Checks the connection to de remote WFS and requests its
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231 | * capabilities.</p>
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232 | *
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233 | */
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234 | 5830 | jorpiell | public boolean connect(boolean override,ICancellable cancel) |
235 | 4887 | jorpiell | { |
236 | try {
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237 | if (handler == null) { |
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238 | if (getHost().trim().length() > 0) { |
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239 | handler = WFSProtocolHandlerFactory.negotiate(getHost()); |
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240 | handler.setHost(getHost()); |
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241 | } else {
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242 | // must to specify host first!!!!
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243 | return false; |
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244 | } |
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245 | } |
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246 | 5830 | jorpiell | getCapabilities(null,override,cancel);
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247 | 4887 | jorpiell | |
248 | return true; |
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249 | |||
250 | } catch (Exception e) { |
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251 | e.printStackTrace(); |
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252 | return false; |
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253 | } |
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254 | } |
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255 | |||
256 | /*
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257 | * (non-Javadoc)
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258 | 5830 | jorpiell | * @see org.gvsig.remoteClient.RemoteClient#connect(org.gvsig.remoteClient.wms.ICancellable)
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259 | */
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260 | public boolean connect(ICancellable cancel) { |
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261 | return connect(false, cancel); |
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262 | } |
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263 | |||
264 | /*
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265 | * (non-Javadoc)
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266 | 4887 | jorpiell | * @see org.gvsig.remoteClient.RemoteClient#close()
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267 | */
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268 | public void close() { |
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269 | // TODO Auto-generated method stub
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270 | |||
271 | } |
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272 | |||
273 | public String getVersion() |
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274 | { |
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275 | return handler.getVersion();
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276 | 5368 | jorpiell | } |
277 | |||
278 | 4887 | jorpiell | /**
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279 | * Gets the Service information included in the Capabilities
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280 | */
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281 | |||
282 | 18271 | jpiera | public WFSServiceInformation getServiceInformation(){
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283 | 27881 | jpiera | return (WFSServiceInformation)handler.getServiceInformation();
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284 | 4887 | jorpiell | } |
285 | |||
286 | 4912 | jorpiell | /**
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287 | * Returns the features list
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288 | * @return
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289 | */
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290 | public Hashtable getFeatures() |
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291 | 4887 | jorpiell | { |
292 | return handler.getFeatures();
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293 | 31835 | jpiera | } |
294 | |||
295 | /**
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296 | * @return the lastWfsRequestInformation
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297 | */
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298 | public WFSRequestInformation getLastWfsRequestInformation() {
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299 | return handler.getLastWfsRequestInformation();
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300 | } |
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301 | 4887 | jorpiell | |
302 | 31835 | jpiera | /**
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303 | * @return the number requests
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304 | */
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305 | public int getWFSRequestInformationCount(){ |
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306 | return handler.getWfsRequestInformations().size();
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307 | } |
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308 | |||
309 | /**
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310 | * Return the information of a request
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311 | * @param index
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312 | * The position of the request
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313 | * @return
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314 | */
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315 | public WFSRequestInformation getWFSRequestInformationAt(int index){ |
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316 | ArrayList wfsRequestInformations = handler.getWfsRequestInformations();
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317 | if (index < wfsRequestInformations.size()){
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318 | return (WFSRequestInformation)wfsRequestInformations.get(index);
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319 | } |
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320 | return null; |
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321 | } |
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322 | |||
323 | 4887 | jorpiell | } |