root / trunk / libraries / libRemoteServices / src / org / gvsig / remoteClient / wms / WMSProtocolHandler.java @ 3345
History | View | Annotate | Download (6.74 KB)
1 | 3323 | ldiaz | |
---|---|---|---|
2 | package org.gvsig.remoteClient.wms; |
||
3 | |||
4 | import java.io.BufferedOutputStream; |
||
5 | import java.io.DataOutputStream; |
||
6 | import java.io.File; |
||
7 | import java.io.FileOutputStream; |
||
8 | import java.io.InputStream; |
||
9 | import java.net.URL; |
||
10 | import java.util.TreeMap; |
||
11 | import java.util.Vector; |
||
12 | |||
13 | /**
|
||
14 | * <p> Abstract class that represents handlers to comunicate via WMS protocol.
|
||
15 | * </p>
|
||
16 | *
|
||
17 | */
|
||
18 | public abstract class WMSProtocolHandler { |
||
19 | |||
20 | // procotol handler name
|
||
21 | protected String name; |
||
22 | // protocol handler version
|
||
23 | protected String version; |
||
24 | //host of the WMS to conenct
|
||
25 | protected String host; |
||
26 | // port number of the comunication channel of the WMS to connect
|
||
27 | protected String port; |
||
28 | //WMS metadata
|
||
29 | protected ServiceInformation serviceInfo;
|
||
30 | public TreeMap layers; |
||
31 | 3341 | ldiaz | public Vector srs; |
32 | |||
33 | 3323 | ldiaz | |
34 | // abstract methods to implement by the handlers that implement
|
||
35 | // the connection to a WMS with certain version.
|
||
36 | // public abstract String getName();
|
||
37 | // public abstract String getVersion();
|
||
38 | |||
39 | /**
|
||
40 | * parses the data retrieved by the WMS in XML format.
|
||
41 | * It will be mostly the WMS Capabilities, but the implementation
|
||
42 | * will be placed in the handler implementing certain version of the protocol.
|
||
43 | *
|
||
44 | */
|
||
45 | public abstract void parse(File f); |
||
46 | |||
47 | public String getName() { |
||
48 | return name;
|
||
49 | } |
||
50 | |||
51 | public String getVersion() { |
||
52 | return version;
|
||
53 | } |
||
54 | |||
55 | public ServiceInformation getServiceInformation() {
|
||
56 | return serviceInfo;
|
||
57 | } |
||
58 | public String getHost () |
||
59 | { |
||
60 | return host;
|
||
61 | } |
||
62 | public void setHost(String _host) |
||
63 | { |
||
64 | host = _host; |
||
65 | } |
||
66 | public String getPort() |
||
67 | { |
||
68 | return port;
|
||
69 | } |
||
70 | public void setPort(String _port) |
||
71 | { |
||
72 | port = _port; |
||
73 | } |
||
74 | |||
75 | /**
|
||
76 | * <p>Builds a GetMap request that is sent to the WMS
|
||
77 | * the response (image) will be redirect to the
|
||
78 | * WMS client</p>
|
||
79 | */
|
||
80 | |||
81 | 3345 | ldiaz | public byte[] getMap(WMSStatus status) { |
82 | return null; |
||
83 | 3323 | ldiaz | } |
84 | |||
85 | /**
|
||
86 | * <p>Builds a GetCapabilities request that is sent to the WMS
|
||
87 | * the response will be parse to extract the data needed by the
|
||
88 | * WMS client</p>
|
||
89 | */
|
||
90 | public void getCapabilities() |
||
91 | { |
||
92 | 3345 | ldiaz | URL request = null; |
93 | 3323 | ldiaz | try
|
94 | { |
||
95 | 3345 | ldiaz | request = new URL(buildCapabilitiesRequest()); |
96 | 3323 | ldiaz | } |
97 | catch(Exception e) |
||
98 | { |
||
99 | // TODO something about the exceptionsssss....!!!
|
||
100 | } |
||
101 | |||
102 | File f = null; |
||
103 | f = new File("tochangethis.txt"); |
||
104 | |||
105 | if (!f.exists())
|
||
106 | { |
||
107 | try
|
||
108 | { |
||
109 | DataOutputStream dos = new DataOutputStream( new BufferedOutputStream(new FileOutputStream(f))); |
||
110 | byte[] buffer = new byte[1024*256]; |
||
111 | 3345 | ldiaz | InputStream is = request.openStream();
|
112 | 3323 | ldiaz | long readed = 0; |
113 | for (int i = is.read(buffer); i>0; i = is.read(buffer)){ |
||
114 | dos.write(buffer, 0, i);
|
||
115 | readed += i; |
||
116 | } |
||
117 | dos.close(); |
||
118 | } |
||
119 | catch(Exception e) |
||
120 | {} |
||
121 | } |
||
122 | parse(f); |
||
123 | //return parse(f);
|
||
124 | } |
||
125 | |||
126 | /**
|
||
127 | * <p>It will send a GetFeatureInfo request to the WMS
|
||
128 | * Parsing the response and redirecting the info to the WMS client</p>
|
||
129 | */
|
||
130 | public String getFeatureInfo() |
||
131 | { |
||
132 | return null; |
||
133 | } |
||
134 | |||
135 | 3345 | ldiaz | /**
|
136 | * Builds the GetCapabilitiesRequest according to the OGC WMS Specifications
|
||
137 | */
|
||
138 | private String buildCapabilitiesRequest() |
||
139 | { |
||
140 | String req = new String(); |
||
141 | |||
142 | req = req + getHost() + "REQUEST=GetCapabilities&SERVICE=WMS&";
|
||
143 | req = req + "VERSION=" + getVersion();
|
||
144 | req += ("&EXCEPTIONS=XML");
|
||
145 | return req;
|
||
146 | } |
||
147 | |||
148 | /**
|
||
149 | * Builds the GetMapRequest according to the OGC WMS Specifications
|
||
150 | */
|
||
151 | private String buildMapRequest(WMSStatus status) |
||
152 | { |
||
153 | String req = new String(); |
||
154 | |||
155 | req = req + getHost() + "REQUEST=GetMap&SERVICE=WMS&";
|
||
156 | req = req + "VERSION=" + getVersion() + "&"; |
||
157 | req = req + getPartialQuery(status); |
||
158 | if (status.getExceptionFormat() != null) { |
||
159 | req += ("&EXCEPTIONS=" + status.getExceptionFormat());
|
||
160 | } else {
|
||
161 | req += ("&EXCEPTIONS=XML");
|
||
162 | } |
||
163 | return req;
|
||
164 | } |
||
165 | |||
166 | /**
|
||
167 | * Gets the part of the OGC request that share GetMap and GetFeatureInfo
|
||
168 | * @return String request
|
||
169 | */
|
||
170 | public String getPartialQuery(WMSStatus status) |
||
171 | { |
||
172 | |||
173 | |||
174 | String req = "LAYERS=" + status.getLayerNames() + "&STYLES=" + |
||
175 | status.getStyles() + "&SRS=" + status.getSrs() +
|
||
176 | "&BBOX=" + status.getExtent() + "&WIDTH=" + status.getWidth() + |
||
177 | "&HEIGHT=" + status.getHeight() + "&FORMAT=" + status.getFormat(); |
||
178 | |||
179 | // if (status.getTransparency()) {
|
||
180 | // req += "&TRANSPARENT=TRUE";
|
||
181 | // }
|
||
182 | //
|
||
183 | // if (status.getBGColor() != null) {
|
||
184 | // req += ("&COLOR=" + status.getBGColor());
|
||
185 | // }
|
||
186 | //
|
||
187 | // if (time != null) {
|
||
188 | // req += ("&TIME=" + time);
|
||
189 | // }
|
||
190 | //
|
||
191 | // if (elevation != -1) {
|
||
192 | // req += ("&ELEVATION=" + elevation);
|
||
193 | // }
|
||
194 | |||
195 | return req.replaceAll(" ", "%20"); |
||
196 | } |
||
197 | |||
198 | |||
199 | |||
200 | 3323 | ldiaz | public void close() { |
201 | // your code here
|
||
202 | } |
||
203 | |||
204 | /**
|
||
205 | * Inner class that represents the description of the WMS metadata.
|
||
206 | * The first part of the capabilities will return the service information
|
||
207 | * from the WMS, this class will hold this information.
|
||
208 | *
|
||
209 | */
|
||
210 | public class ServiceInformation { |
||
211 | |||
212 | public String online_resource; |
||
213 | public String version; |
||
214 | public String name; |
||
215 | public String scope; |
||
216 | public String title; |
||
217 | public String abstr; |
||
218 | public String keywords; |
||
219 | public String fees; |
||
220 | public String operationsInfo; |
||
221 | public String personname; |
||
222 | public String organization; |
||
223 | public String function; |
||
224 | public String addresstype; |
||
225 | public String address; |
||
226 | public String place; |
||
227 | public String province; |
||
228 | public String postcode; |
||
229 | public String country; |
||
230 | public String phone; |
||
231 | public String fax; |
||
232 | public String email; |
||
233 | public Vector formats; |
||
234 | |||
235 | public ServiceInformation()
|
||
236 | { |
||
237 | online_resource = new String(); |
||
238 | version = new String(); |
||
239 | name = new String(); |
||
240 | scope = new String(); |
||
241 | title = new String(); |
||
242 | abstr = new String(); |
||
243 | keywords = new String(); |
||
244 | fees = new String(); |
||
245 | operationsInfo = new String(); |
||
246 | personname = new String(); |
||
247 | organization = new String(); |
||
248 | function = new String(); |
||
249 | addresstype = new String(); |
||
250 | address = new String(); |
||
251 | place = new String(); |
||
252 | province = new String(); |
||
253 | postcode = new String(); |
||
254 | country = new String(); |
||
255 | phone = new String(); |
||
256 | fax = new String(); |
||
257 | email = new String(); |
||
258 | formats = new Vector(); |
||
259 | } |
||
260 | } |
||
261 | } |