svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.remoteclient / src / main / java / org / gvsig / remoteclient / wfs / WFSClient.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.remoteclient.wfs; |
25 | |||
26 | import java.io.File; |
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27 | import java.io.IOException; |
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28 | import java.net.ConnectException; |
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29 | import java.util.ArrayList; |
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30 | import java.util.Hashtable; |
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31 | import java.util.Iterator; |
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32 | |||
33 | import org.gvsig.compat.net.ICancellable; |
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34 | import org.gvsig.remoteclient.RemoteClient; |
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35 | import org.gvsig.remoteclient.wfs.exceptions.WFSException; |
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36 | |||
37 | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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38 | *
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39 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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40 | *
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41 | * This program is free software; you can redistribute it and/or
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42 | * modify it under the terms of the GNU General Public License
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43 | * as published by the Free Software Foundation; either version 2
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44 | * of the License, or (at your option) any later version.
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45 | *
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46 | * This program is distributed in the hope that it will be useful,
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47 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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48 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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49 | * GNU General Public License for more details.
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50 | *
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51 | * You should have received a copy of the GNU General Public License
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52 | * along with this program; if not, write to the Free Software
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53 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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54 | *
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55 | * For more information, contact:
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56 | *
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57 | * Generalitat Valenciana
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58 | * Conselleria d'Infraestructures i Transport
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59 | * Av. Blasco Ib??ez, 50
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60 | * 46010 VALENCIA
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61 | * SPAIN
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62 | *
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63 | * +34 963862235
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64 | * gvsig@gva.es
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65 | * www.gvsig.gva.es
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66 | *
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67 | * or
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68 | *
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69 | * IVER T.I. S.A
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70 | * Salamanca 50
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71 | * 46005 Valencia
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72 | * Spain
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73 | *
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74 | * +34 963163400
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75 | * dac@iver.es
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76 | */
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77 | /* CVS MESSAGES:
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78 | *
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79 | * $Id: WFSClient.java 39768 2013-02-20 14:16:29Z jldominguez $
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80 | * $Log$
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81 | * Revision 1.10 2007-09-20 09:30:12 jaume
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82 | * removed unnecessary imports
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83 | *
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84 | * Revision 1.9 2007/02/09 14:11:01 jorpiell
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85 | * Primer piloto del soporte para WFS 1.1 y para WFS-T
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86 | *
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87 | * Revision 1.8 2006/06/14 08:46:07 jorpiell
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88 | * Se tiene en cuanta la opcion para refrescar las capabilities
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89 | *
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90 | * Revision 1.7 2006/05/25 10:28:25 jorpiell
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91 | * Se ha a?adido un atributo al m?todo connect
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92 | *
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93 | * Revision 1.6 2006/05/23 13:23:22 jorpiell
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94 | * Se ha cambiado el final del bucle de parseado y se tiene en cuenta el online resource
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95 | *
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96 | * Revision 1.4 2006/04/20 16:39:16 jorpiell
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97 | * A?adida la operacion de describeFeatureType y el parser correspondiente.
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98 | *
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99 | * Revision 1.3 2006/04/19 12:51:35 jorpiell
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100 | * A?adidas algunas de las clases del servicio WFS
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101 | *
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102 | *
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103 | */
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104 | /**
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105 | * Represents the class the with the necessary logic to connect to a
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106 | * OGCWFS and interpretate the data
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107 | * @author Jorge Piera Llodr? (piera_jor@gva.es)
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108 | */
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109 | public class WFSClient extends RemoteClient{ |
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110 | |||
111 | private WFSProtocolHandler handler;
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112 | |||
113 | //private Logger LOG = LoggerFactory.getLogger(WFSClient.class);
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114 | |||
115 | /**
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116 | * Constructor.
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117 | * the parameter host, indicates the WFS host to connect.
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118 | * @throws ConnectException,IOException
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119 | *
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120 | */
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121 | public WFSClient(String host) throws ConnectException,IOException { |
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122 | setHost(host); |
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123 | |||
124 | handler = WFSProtocolHandlerFactory.negotiate(host); |
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125 | handler.setHost(host); |
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126 | } |
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127 | |||
128 | public WFSClient(String host, String version) throws IOException { |
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129 | |||
130 | setHost(host); |
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131 | |||
132 | if (version == null) { |
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133 | try {
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134 | handler = WFSProtocolHandlerFactory.negotiate(host); |
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135 | } catch(ConnectException conE) { |
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136 | conE.printStackTrace(); |
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137 | throw conE;
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138 | } catch(IOException ioE) { |
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139 | ioE.printStackTrace(); |
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140 | throw ioE;
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141 | } catch(Exception e) { |
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142 | e.printStackTrace(); |
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143 | } |
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144 | }else{
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145 | handler = WFSProtocolHandlerFactory.createVersionDriver(version); |
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146 | } |
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147 | |||
148 | if (handler == null){ |
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149 | throw new UnsupportedOperationException("Unsupported version"); |
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150 | } |
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151 | handler.setHost(host); |
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152 | } |
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153 | |||
154 | /**
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155 | * Every OGC Web Service (OWS), including a Web Feature Service,
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156 | * must have the ability to describe its capabilities by returning
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157 | * service metadata in response to a GetCapabilities request.
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158 | * @param status
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159 | * WFS client status. Contains all the information to create
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160 | * the query
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161 | */
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162 | public void getCapabilities(WFSStatus status, boolean override, ICancellable cancel)throws WFSException { |
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163 | handler.getCapabilities(status,override,cancel); |
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164 | } |
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165 | |||
166 | /**
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167 | * The function of the DescribeFeatureType operation is to
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168 | * generate a schema description of feature types serviced
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169 | * by a WFS implementation. The schema descriptions define
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170 | * how a WFS implementation expects feature instances to
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171 | * be encoded on input (via Insert and Update requests)
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172 | * and how feature instances will be generated on output
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173 | * (in response to GetFeature and GetGmlObject requests).
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174 | * @param status
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175 | * WFS client status. Contains all the information to create
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176 | * the query
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177 | */
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178 | public File describeFeatureType(WFSStatus status, boolean override, ICancellable cancel)throws WFSException { |
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179 | return handler.describeFeatureType(status,override,cancel);
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180 | } |
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181 | |||
182 | /**
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183 | * The GetFeature operation allows retrieval of features from a
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184 | * web feature service. A GetFeature request is processed by
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185 | * a WFS and when the value of the outputFormat attribute is
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186 | * set to text/gml a GML instance document, containing the
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187 | * result set, is returned to the client.
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188 | * @param status
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189 | * WFS client status. Contains all the information to create
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190 | * the query
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191 | * @return File
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192 | * GML File
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193 | */
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194 | public File getFeature(WFSStatus status, boolean override, ICancellable cancel) throws WFSException{ |
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195 | if ((status.getNamespaceLocation() != null) && (status.getNamespacePrefix() == null)){ |
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196 | String namespacePrefix = getServiceInformation().getNamespacePrefix(status.getNamespaceLocation());
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197 | if (namespacePrefix != null){ |
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198 | status.setNamespacePrefix(namespacePrefix); |
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199 | } |
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200 | } |
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201 | return handler.getFeature(status,override,cancel);
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202 | } |
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203 | |||
204 | /**
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205 | * The Transaction operation is used to describe data transformation
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206 | * operations that are to be applied to web accessible feature
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207 | * instances. A web feature service may process a Transaction
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208 | * operation directly or possibly translate it into the language
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209 | * of a target datastore to which it is connected and then have the
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210 | * datastore execute the transaction. When the transaction has been
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211 | * completed, a web feature service will generate an XML response
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212 | * document indicating the completion status of the transaction.
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213 | * @param status
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214 | * WFS client status. Contains all the information to create
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215 | * the query
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216 | */
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217 | public void transaction(WFSStatus status, boolean override, ICancellable cancel) throws WFSException{ |
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218 | handler.transaction(status,override,cancel); |
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219 | } |
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220 | |||
221 | /**
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222 | * Web connections are inherently stateless. As a consequence
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223 | * of this, the semantics of serializable transactions are not
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224 | * preserved. To understand the issue, consider an update operation.
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225 | * The client fetches a feature instance. The feature is then
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226 | * modified on the client side, and submitted back to the database
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227 | * via a Transaction request for update. Serializability is lost
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228 | * since there is nothing to guarantee that while the feature was
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229 | * being modified on the client side, another client did not come
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230 | * along and update that same feature in the database.
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231 | * One way to ensure serializability is to require that access to
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232 | * data be done in a mutually exclusive manner; that is while one
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233 | * transaction accesses a data item, no other transaction can modify
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234 | * the same data item. This can be accomplished by using locks that
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235 | * control access to the data.
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236 | * The purpose of the LockFeature operation is to expose a long
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237 | * term feature locking mechanism to ensure consistency. The lock
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238 | * is considered long term because network latency would make
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239 | * feature locks last relatively longer than native commercial
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240 | * database locks.
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241 | * The LockFeature operation is optional and does not need to be
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242 | * implemented for a WFS implementation to conform to this
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243 | * specification. If a WFS implements the LockFeature operation,
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244 | * this fact must be advertised in the capabilities document
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245 | * @param status
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246 | */
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247 | public void lockFeature(WFSStatus status, boolean override, ICancellable cancel)throws WFSException { |
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248 | handler.lockFeature(status,override,cancel); |
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249 | } |
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250 | |||
251 | |||
252 | /**
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253 | * <p>Checks the connection to de remote WFS and requests its
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254 | * capabilities.</p>
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255 | *
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256 | */
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257 | public boolean connect(boolean override, ICancellable cancel) |
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258 | { |
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259 | try {
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260 | if (handler == null) { |
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261 | if (getHost().trim().length() > 0) { |
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262 | handler = WFSProtocolHandlerFactory.negotiate(getHost()); |
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263 | handler.setHost(getHost()); |
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264 | } else {
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265 | // must to specify host first!!!!
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266 | return false; |
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267 | } |
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268 | } |
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269 | getCapabilities(null,override,cancel);
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270 | |||
271 | return true; |
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272 | |||
273 | } catch (Exception e) { |
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274 | e.printStackTrace(); |
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275 | return false; |
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276 | } |
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277 | } |
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278 | |||
279 | /*
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280 | * (non-Javadoc)
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281 | * @see org.gvsig.remoteClient.RemoteClient#connect(org.gvsig.remoteClient.wms.ICancellable)
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282 | */
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283 | public boolean connect(ICancellable cancel) { |
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284 | return connect(false, cancel); |
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285 | } |
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286 | |||
287 | /*
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288 | * (non-Javadoc)
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289 | * @see org.gvsig.remoteClient.RemoteClient#close()
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290 | */
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291 | public void close() { |
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292 | // TODO Auto-generated method stub
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293 | |||
294 | } |
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295 | |||
296 | public String getVersion() |
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297 | { |
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298 | return handler.getVersion();
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299 | } |
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300 | |||
301 | /**
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302 | * Gets the Service information included in the Capabilities
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303 | */
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304 | |||
305 | public WFSServiceInformation getServiceInformation(){
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306 | return (WFSServiceInformation)handler.getServiceInformation();
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307 | } |
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308 | |||
309 | /**
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310 | * Returns the features list
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311 | * @return
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312 | */
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313 | public Hashtable getFeatures() |
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314 | { |
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315 | return handler.getFeatures();
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316 | } |
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317 | |||
318 | public WFSFeature getFeature(String nameSpace, String localName){ |
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319 | Iterator it = handler.getFeatures().keySet().iterator();
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320 | String fullName = localName;
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321 | String prefix = getServiceInformation().getNamespacePrefix(nameSpace);
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322 | if (prefix != null){ |
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323 | fullName = prefix + ":" + localName;
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324 | } |
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325 | while (it.hasNext()){
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326 | String featureName = (String)it.next(); |
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327 | if (localName.equals(featureName)){
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328 | return (WFSFeature)handler.getFeatures().get(localName);
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329 | } |
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330 | if (fullName.equals(featureName)){
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331 | return (WFSFeature)handler.getFeatures().get(fullName);
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332 | } |
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333 | } |
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334 | return null; |
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335 | } |
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336 | |||
337 | /**
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338 | * @return the lastWfsRequestInformation
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339 | */
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340 | public WFSRequestInformation getLastWfsRequestInformation() {
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341 | return handler.getLastWfsRequestInformation();
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342 | } |
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343 | |||
344 | /**
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345 | * @return the number requests
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346 | */
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347 | public int getWFSRequestInformationCount(){ |
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348 | return handler.getWfsRequestInformations().size();
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349 | } |
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350 | |||
351 | /**
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352 | * Return the information of a request
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353 | * @param index
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354 | * The position of the request
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355 | * @return
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356 | */
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357 | public WFSRequestInformation getWFSRequestInformationAt(int index){ |
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358 | ArrayList wfsRequestInformations = handler.getWfsRequestInformations();
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359 | if (index < wfsRequestInformations.size()){
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360 | return (WFSRequestInformation)wfsRequestInformations.get(index);
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361 | } |
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362 | return null; |
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363 | } |
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364 | |||
365 | } |