Mercurial > dive4elements > river

comparison flys-artifacts/src/main/java/de/intevation/flys/exports/ChartGenerator.java @ 423:bab867fb37e8

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Charts are generated using the size defined in the incoming request document. flys-artifacts/trunk@1908 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 12 May 2011 09:11:16 +0000
parents 046bd86ae41d
children 8fa4c5c9cd1a
comparison
equal deleted inserted replaced
422:3b83341e0cf4 423:bab867fb37e8
1 package de.intevation.flys.exports; 1 package de.intevation.flys.exports;
2 2
3 import java.io.IOException; 3 import java.io.IOException;
4 import java.io.OutputStream; 4 import java.io.OutputStream;
5 5
6 import javax.xml.xpath.XPathConstants;
7
6 import org.apache.log4j.Logger; 8 import org.apache.log4j.Logger;
7 9
8 import org.w3c.dom.Document; 10 import org.w3c.dom.Document;
11 import org.w3c.dom.Node;
9 12
10 import de.intevation.artifacts.Artifact; 13 import de.intevation.artifacts.Artifact;
11 import de.intevation.artifacts.CallContext; 14 import de.intevation.artifacts.CallContext;
15
16 import de.intevation.artifacts.ArtifactNamespaceContext;
17 import de.intevation.artifacts.common.utils.XMLUtils;
12 18
13 import de.intevation.flys.model.River; 19 import de.intevation.flys.model.River;
14 20
15 import de.intevation.flys.artifacts.FLYSArtifact; 21 import de.intevation.flys.artifacts.FLYSArtifact;
16 import de.intevation.flys.artifacts.resources.Resources; 22 import de.intevation.flys.artifacts.resources.Resources;
23 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> 29 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
24 */ 30 */
25 public abstract class ChartGenerator implements OutGenerator { 31 public abstract class ChartGenerator implements OutGenerator {
26 32
27 private static Logger logger = Logger.getLogger(ChartGenerator.class); 33 private static Logger logger = Logger.getLogger(ChartGenerator.class);
34
35
36 /** The default chart width, if no other width is set.*/
37 public static final int DEFAULT_CHART_WIDTH = 600;
38
39 /** The default chart height, if no other height is set.*/
40 public static final int DEFAULT_CHART_HEIGHT = 400;
41
42 /** The XPath that points to the chart size of the incoming request
43 * document.*/
44 public static final String XPATH_CHART_SIZE =
45 "/art:action/art:attributes/art:size";
28 46
29 47
30 /** The document of the incoming out() request.*/ 48 /** The document of the incoming out() request.*/
31 protected Document request; 49 protected Document request;
32 50
77 95
78 return flys.getDistance(); 96 return flys.getDistance();
79 } 97 }
80 98
81 99
100 /**
101 * Returns the size of a chart export as array which has been specified by
102 * the incoming request document.
103 *
104 * @return the size of a chart as [width, height] or the result of
105 * getDefaultSize() if no width or height are given in the request document.
106 */
107 protected int[] getSize() {
108 int[] size = new int[2];
109
110 Node sizeEl = (Node) XMLUtils.xpath(
111 request,
112 XPATH_CHART_SIZE,
113 XPathConstants.NODE,
114 ArtifactNamespaceContext.INSTANCE);
115
116 if (sizeEl != null) {
117 String w = XMLUtils.xpathString(
118 sizeEl, "@art:width", ArtifactNamespaceContext.INSTANCE);
119
120 String h = XMLUtils.xpathString(
121 sizeEl, "@art:height", ArtifactNamespaceContext.INSTANCE);
122
123 if (w != null && w.length() > 0 && h != null && h.length() > 0) {
124 try {
125 size[0] = Integer.parseInt(w);
126 size[1] = Integer.parseInt(h);
127 }
128 catch (NumberFormatException nfe) {
129 logger.warn("Wrong values for chart width/height.");
130 }
131 }
132 }
133
134 return size[0] > 0 && size[1] > 0 ? size : getDefaultSize();
135 }
136
137
138 /**
139 * Returns the default size of a chart export as array.
140 *
141 * @return the default size of a chart as [width, height].
142 */
143 protected int[] getDefaultSize() {
144 return new int[] { DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT };
145 }
146
147
82 public abstract void doOut(Artifact artifact, String facet, Document attr); 148 public abstract void doOut(Artifact artifact, String facet, Document attr);
83 149
84 public abstract void generate() throws IOException; 150 public abstract void generate() throws IOException;
85 } 151 }
86 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : 152 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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