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comparison flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java @ 340:b36fd8f21e6a

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Implementation of interfaces and its default implementations and a factory to work with themes. flys-artifacts/trunk@1739 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 21 Apr 2011 08:44:41 +0000
parents
children f72c63713099
comparison
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339:4509ba8fae68 340:b36fd8f21e6a
1 package de.intevation.flys.themes;
2
3 import javax.xml.xpath.XPathConstants;
4
5 import org.apache.log4j.Logger;
6
7 import org.w3c.dom.Document;
8 import org.w3c.dom.NamedNodeMap;
9 import org.w3c.dom.Node;
10 import org.w3c.dom.NodeList;
11
12 import de.intevation.artifacts.common.utils.XMLUtils;
13
14
15 /**
16 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
17 */
18 public class ThemeFactory {
19
20 private static Logger logger = Logger.getLogger(ThemeFactory.class);
21
22 private ThemeFactory() {
23 }
24
25
26 /**
27 * Creates a new theme from <i>config</i>.
28 *
29 * @param themeCfg The theme config document that is used to fetch parent
30 * themes.
31 * @param config The theme config node.
32 *
33 * @return a new theme.
34 */
35 public static Theme createTheme(Document themeCfg, Node config) {
36 String name = getName(config);
37 String desc = getDescription(config);
38
39 logger.debug("Create new theme: " + name);
40
41 Theme theme = new DefaultTheme(name, desc);
42
43 parseInherits(themeCfg, config, theme);
44 parseFields(config, theme);
45 parseAttrs(config, theme);
46
47 String tmp = theme.getAttribute("type");
48 if (tmp == null || !tmp.equals("virtual")) {
49 de.intevation.flys.artifacts.XMLDebug.out(theme.toXML());
50 }
51
52 return theme;
53 }
54
55
56 protected static String getName(Node config) {
57 return (String) XMLUtils.xpath(config, "@name", XPathConstants.STRING);
58 }
59
60
61 protected static String getDescription(Node config) {
62 return (String) XMLUtils.xpath(config, "@desc", XPathConstants.STRING);
63 }
64
65
66 protected static void parseInherits(Document themeCfg, Node cfg, Theme t) {
67 logger.debug("ThemeFactory.parseInherits");
68
69 NodeList inherits = (NodeList) XMLUtils.xpath(
70 cfg, "inherits/inherit", XPathConstants.NODESET);
71
72 int num = inherits != null ? inherits.getLength() : 0;
73
74 if (num == 0) {
75 logger.debug("Theme does not inherit from other themes.");
76 return;
77 }
78
79 logger.debug("Theme inherits from " + num + " other themes.");
80
81 for (int i = 0; i < num; i++) {
82 Node inherit = inherits.item(i);
83 String from = (String) XMLUtils.xpath(
84 inherit, "@from", XPathConstants.STRING);
85
86 Node tmp = getThemeNode(themeCfg, from);
87
88 parseInherits(themeCfg, tmp, t);
89 parseFields(tmp, t);
90 }
91 }
92
93
94 protected static Node getThemeNode(Document themeCfg, String name) {
95 if (name == null) {
96 logger.warn("Cannot search theme config without name!");
97 return null;
98 }
99
100 logger.debug("Search for theme: " + name);
101
102 String xpath = "/themes/theme[@name='" + name + "']";
103
104 return (Node) XMLUtils.xpath(themeCfg, xpath, XPathConstants.NODE);
105 }
106
107
108 protected static void parseFields(Node config, Theme theme) {
109 if (config == null || theme == null) {
110 logger.warn("Parsing fields without node or theme is senseless!");
111 return;
112 }
113
114 NodeList fields = (NodeList) XMLUtils.xpath(
115 config, "fields/field", XPathConstants.NODESET);
116
117 int num = fields != null ? fields.getLength() : 0;
118
119 logger.debug("Found " + num + " own fields in this theme.");
120
121 if (num == 0) {
122 logger.debug("Theme has no own fields.");
123 return;
124 }
125
126 for (int i = 0; i < num; i++) {
127 Node field = fields.item(i);
128
129 addField(theme, field);
130 }
131 }
132
133
134 protected static void addField(Theme theme, Node field) {
135 String name = (String) XMLUtils.xpath(
136 field, "@name", XPathConstants.STRING);
137
138 logger.debug("Add field: " + name);
139
140 NamedNodeMap attrs = field.getAttributes();
141
142 int num = attrs != null ? attrs.getLength() : 0;
143
144 if (num == 0) {
145 logger.warn("This field has no attributes.");
146 return;
147 }
148
149 ThemeField theField = new DefaultThemeField(name);
150
151 for (int i = 0; i < num; i++) {
152 Node attr = attrs.item(i);
153
154 String key = attr.getNodeName();
155 String value = attr.getNodeValue();
156
157 theField.setAttribute(key, value);
158 }
159
160 theme.addField(name, theField);
161 }
162
163
164 protected static void parseAttrs(Node config, Theme theme) {
165 NamedNodeMap attrs = config.getAttributes();
166
167 int num = attrs != null ? attrs.getLength() : 0;
168
169 if (num == 0) {
170 logger.debug("Theme has no attributes set.");
171 return;
172 }
173
174 for (int i = 0; i < num; i++) {
175 Node attr = attrs.item(i);
176
177 String name = attr.getNodeName();
178 String value = attr.getNodeValue();
179
180 theme.addAttribute(name, value);
181 }
182 }
183 }
184 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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