Mercurial > dive4elements > river

comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/CrossSectionArtifact.java @ 3814:8083f6384023

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merged flys-artifacts/pre2.6-2012-01-04
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:56 +0200
parents cd9bcdcf6597
children f021080cb409
comparison
equal deleted inserted replaced
1491:2a00f4849738 3814:8083f6384023
1 package de.intevation.flys.artifacts;
2
3 import java.util.ArrayList;
4 import java.util.List;
5
6 import org.apache.log4j.Logger;
7
8 import org.w3c.dom.Document;
9
10 import de.intevation.artifacts.Artifact;
11 import de.intevation.artifacts.ArtifactFactory;
12 import de.intevation.artifacts.CallMeta;
13
14 import de.intevation.flys.artifacts.model.CrossSectionFacet;
15
16 import de.intevation.flys.model.CrossSection;
17 import de.intevation.flys.model.CrossSectionLine;
18 import de.intevation.flys.artifacts.model.CrossSectionFactory;
19 import de.intevation.artifacts.common.ArtifactNamespaceContext;
20 import de.intevation.artifacts.common.utils.XMLUtils;
21
22 import de.intevation.flys.artifacts.states.StaticState;
23
24 import de.intevation.artifactdatabase.state.Facet;
25 import de.intevation.artifactdatabase.state.State;
26
27 import de.intevation.flys.utils.FLYSUtils;
28
29
30 /**
31 * Artifact describing a cross-section.
32 */
33 public class CrossSectionArtifact extends StaticFLYSArtifact {
34
35 /** Access ids of doc. */
36 public static final String XPATH_IDS = "/art:action/art:ids/@value";
37
38 /** Name of Artifact. */
39 public static final String CS_ARTIFACT_NAME = "cross_section";
40
41 /** Name of state. */
42 public static final String STATIC_STATE_NAME = "state.cross_section";
43
44 /** Name of data item keeping the position. */
45 public static final String DATA_KM = "cross_section.km";
46
47 /** Name of data item keeping the database id of this c.s.. */
48 public static final String DATA_DBID = "cross_section.dbid";
49
50 /** Name of data item flagging whether we think that we are master. */
51 public static final String DATA_IS_MASTER = "cross_section.master?";
52
53 /** Name of data item flagging whether we are the newest. */
54 public static final String DATA_IS_NEWEST = "cross_section.newest?";
55
56 /** Own logger. */
57 private static final Logger logger =
58 Logger.getLogger(CrossSectionArtifact.class);
59
60
61 /** Return given name. */
62 @Override
63 public String getName() {
64 return CS_ARTIFACT_NAME;
65 }
66
67
68 /** Store ids, create a CrossSectionFacet. */
69 @Override
70 public void setup(
71 String identifier,
72 ArtifactFactory factory,
73 Object context,
74 CallMeta callMeta,
75 Document data)
76 {
77 logger.info("CrossSectionArtifact.setup");
78
79 super.setup(identifier, factory, context, callMeta, data);
80
81 String ids = XMLUtils.xpathString(
82 data, XPATH_IDS, ArtifactNamespaceContext.INSTANCE);
83
84 if (ids != null && ids.length() > 0) {
85 addStringData(DATA_DBID, ids);
86 logger.debug("CrossSectionArtifacts db-id: " + ids);
87 }
88 else {
89 throw new IllegalArgumentException("No attribute 'ids' found!");
90 }
91
92 List<Facet> fs = new ArrayList<Facet>();
93 CrossSection cs = CrossSectionFactory.getCrossSection(Integer.valueOf(ids));
94 CrossSectionLine csl = cs.getLines().get(0);
95 // Find min-km of cross sections, than set DATA_KM to min(DATA_KM, minCross).
96 if (csl != null) {
97 double masterKm = Double.valueOf(getDataAsString(DATA_KM));
98 if (masterKm < csl.getKm().doubleValue()) {
99 addStringData(DATA_KM, csl.getKm().toString());
100 }
101 }
102 fs.add(new CrossSectionFacet(0, cs.getDescription()));
103
104 // Find out if we are newest.
105 boolean isNewest = CrossSectionFactory.isNewest(cs);
106 String newString = (isNewest) ? "1" : "0";
107 addStringData(DATA_IS_NEWEST, newString);
108 addStringData(DATA_IS_MASTER, newString);
109
110 StaticState state = (StaticState) getCurrentState(context);
111
112 if (!fs.isEmpty()) {
113 facets.put(getCurrentStateId(), fs);
114 }
115 }
116
117
118 /** Copy km where master-artifact "starts". */
119 @Override
120 protected void initialize(
121 Artifact artifact,
122 Object context,
123 CallMeta callMeta)
124 {
125 WINFOArtifact winfo = (WINFOArtifact) artifact;
126 double[] range = FLYSUtils.getKmRange(winfo);
127 double min = 0.0f;
128 if (range != null && range.length > 0) {
129 min = range[0];
130 }
131 this.addStringData(DATA_KM, Double.toString(min));
132 }
133
134
135 /**
136 * Create and return a new StaticState with charting output.
137 */
138 @Override
139 public State getCurrentState(Object cc) {
140 final List<Facet> fs = facets.get(getCurrentStateId());
141
142 StaticState state = new StaticState(STATIC_STATE_NAME) {
143 @Override
144 public Object staticCompute(List<Facet> facets) {
145 if (facets != null) {
146 facets.addAll(fs);
147 }
148 return null;
149 }
150 };
151
152 state.addDefaultChartOutput("cross_section", fs);
153
154 return state;
155 }
156
157
158 /**
159 * Get a list containing the one and only State.
160 * @param context ignored.
161 * @return list with one and only state.
162 */
163 @Override
164 protected List<State> getStates(Object context) {
165 ArrayList<State> states = new ArrayList<State>();
166 states.add(getCurrentState(context));
167
168 return states;
169 }
170
171 // TODO all data access needs proper caching.
172
173 /**
174 * Get a DataItem casted to int (0 if fails).
175 */
176 public int getDataAsIntNull(String dataName) {
177 String val = getDataAsString(dataName);
178 try {
179 return Integer.valueOf(val);
180 }
181 catch (NumberFormatException e) {
182 logger.warn("Could not get data " + dataName + " as int", e);
183 return 0;
184 }
185 }
186
187
188 /** Returns database-id of cross-section (from data). */
189 protected int getDBID() {
190 return getDataAsIntNull(DATA_DBID);
191 }
192
193
194 /**
195 * Return position (km) from data, 0 if not found.
196 */
197 protected double getKm() {
198 String val = getDataAsString(DATA_KM);
199 try {
200 return Double.valueOf(val);
201 }
202 catch (NumberFormatException e) {
203 logger.warn("Could not get data " + DATA_KM + " as double", e);
204 return 0;
205 }
206 }
207
208
209 /** Returns true if artifact is set to be a "master" (other facets will
210 * refer to this). */
211 public boolean isMaster() {
212 return !getDataAsString(DATA_IS_MASTER).equals("0");
213 }
214
215
216 /**
217 * Get points of Profile of cross section at given kilometer.
218 *
219 * @return an array holding coordinates of points of profile (
220 * in the form {{x1, x2} {y1, y2}} ).
221 */
222 public double [][] getCrossSectionData() {
223 logger.info("getCrossSectionData() for cross_section.km "
224 + getDataAsString(DATA_KM));
225 CrossSectionLine line = searchCrossSectionLine();
226
227 return line != null
228 ? line.fetchCrossSectionProfile()
229 : null;
230 }
231
232
233 /**
234 * Get CrossSectionLine spatially closest to what is specified in the data
235 * "cross_section.km".
236 *
237 * @return CrossSectionLine closest to "cross_section.km".
238 */
239 public CrossSectionLine searchCrossSectionLine() {
240 double wishKM = getKm();
241
242 CrossSection crossSection = CrossSectionFactory.getCrossSection(getDBID());
243 logger.debug("dbid " + getDBID() + " : " + crossSection);
244 List<CrossSectionLine> crossSectionLines =
245 crossSection.getLines();
246
247 // Get the cross section closest to requested km.
248 // Naive, linear approach.
249 CrossSectionLine oldLine = crossSectionLines.get(0);
250 double oldDiff = Math.abs(wishKM - oldLine.getKm().doubleValue());
251 for (CrossSectionLine line: crossSectionLines) {
252 double diff = Math.abs(wishKM - line.getKm().doubleValue());
253 if (diff > oldDiff) {
254 break;
255 }
256 oldDiff = diff;
257 oldLine = line;
258 }
259 return oldLine;
260 }
261
262
263 /**
264 * Determines Facets initial disposition regarding activity (think of
265 * selection in Client ThemeList GUI). This will be checked one time
266 * when the facet enters a collections describe document.
267 *
268 * @param outputName Ignored.
269 * @param facetName Ignored.
270 * @param index Ignored.
271 * @return 0 if not active
272 */
273 @Override
274 public int getInitialFacetActivity(String outputName, String facetName, int index) {
275 return (getDataAsString(DATA_IS_NEWEST) != null
276 && getDataAsString(DATA_IS_NEWEST).equals("1")) ? 1 : 0;
277 }
278 }
279 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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