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comparison flys-client/src/main/java/de/intevation/flys/client/server/ChartServiceHelper.java @ 549:e74bf6bfeeb6

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Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService. flys-client/trunk@2060 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 07 Jun 2011 10:03:19 +0000
parents
children 19f621663b7a
comparison
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548:aff225e07720 549:e74bf6bfeeb6
1 package de.intevation.flys.client.server;
2
3 import java.util.Map;
4
5 import org.w3c.dom.Document;
6 import org.w3c.dom.Element;
7
8 import de.intevation.artifacts.common.ArtifactNamespaceContext;
9 import de.intevation.artifacts.common.utils.XMLUtils;
10 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
11
12
13 /**
14 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
15 */
16 public class ChartServiceHelper {
17
18 /** The default chart width if no value is specified in the request.*/
19 public static final int DEFAULT_CHART_WIDTH = 600;
20
21 /** The default chart height if no value is specified in the request.*/
22 public static final int DEFAULT_CHART_HEIGHT = 400;
23
24
25 private ChartServiceHelper() {
26 }
27
28 /**
29 * This method returns a document which might contain parameters to adjust
30 * chart settings. The document is created using the information that are
31 * contained in the request object.
32 *
33 * @param req The request document.
34 *
35 * @return a document to adjust chart settings.
36 */
37 protected static Document getChartAttributes(Map<String, String> req) {
38 System.out.println("ChartServiceHelper.getChartAttributes");
39
40 Document doc = XMLUtils.newDocument();
41
42 ElementCreator ec = new ElementCreator(
43 doc,
44 ArtifactNamespaceContext.NAMESPACE_URI,
45 ArtifactNamespaceContext.NAMESPACE_PREFIX);
46
47 Element attributes = ec.create("attributes");
48
49 appendChartSize(req, attributes, ec);
50 appendXRange(req, attributes, ec);
51 appendYRange(req, attributes, ec);
52
53 doc.appendChild(attributes);
54
55 return doc;
56 }
57
58
59 /**
60 * This method extracts the size (width/height) of a chart from request
61 * object and append those values - if they exist - to the attribute
62 * document used to adjust chart settings.
63 *
64 * @param req The request object that might contain the chart size.
65 * @param attributes The attributes element used to adjust chart settings.
66 * @param ec The ElementCreator that might be used to create new Elements.
67 */
68 protected static void appendChartSize(
69 Map<String, String> req,
70 Element attributes,
71 ElementCreator ec)
72 {
73 System.out.println("ChartServiceHelper.appendChartSize");
74
75 Element size = ec.create("size");
76
77 String width = req.get("width");
78 String height = req.get("height");
79
80 if (width == null || height == null) {
81 width = String.valueOf(DEFAULT_CHART_WIDTH);
82 height = String.valueOf(DEFAULT_CHART_HEIGHT);
83 }
84
85 ec.addAttr(size, "width", width, true);
86 ec.addAttr(size, "height", height, true);
87
88 attributes.appendChild(size);
89 }
90
91
92 /**
93 * This method extracts the x range for the chart from request object and
94 * appends those range - if it exists - to the attribute document used to
95 * adjust the chart settings.
96 *
97 * @param req The request object that might contain the chart size.
98 * @param doc The attribute document used to adjust chart settings.
99 * @param ec The ElementCreator that might be used to create new Elements.
100 */
101 protected static void appendXRange(
102 Map<String, String> req,
103 Element attributes,
104 ElementCreator ec)
105 {
106 System.out.println("ChartServiceHelper.appendXRange");
107
108 Element range = ec.create("xrange");
109
110 String from = req.get("minx");
111 String to = req.get("maxx");
112
113 if (from != null && to != null) {
114 ec.addAttr(range, "from", from, true);
115 ec.addAttr(range, "to", to, true);
116
117 attributes.appendChild(range);
118 }
119 }
120
121
122 /**
123 * This method extracts the x range for the chart from request object and
124 * appends those range - if it exists - to the attribute document used to
125 * adjust the chart settings.
126 *
127 * @param req The request object that might contain the chart size.
128 * @param doc The attribute document used to adjust chart settings.
129 * @param ec The ElementCreator that might be used to create new Elements.
130 */
131 protected static void appendYRange(
132 Map<String, String> req,
133 Element attributes,
134 ElementCreator ec)
135 {
136 System.out.println("ChartServiceHelper.appendYRange");
137
138 Element range = ec.create("yrange");
139
140 String from = req.get("miny");
141 String to = req.get("maxy");
142
143 if (from != null && to != null) {
144 ec.addAttr(range, "from", from, true);
145 ec.addAttr(range, "to", to, true);
146
147 attributes.appendChild(range);
148 }
149 }
150 }
151 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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