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1
29
30 package nextapp.echo2.app.componentxml;
31
32 import java.io.IOException  ;
33 import java.io.InputStream ;
34 import java.util.HashMap ;
35 import java.util.Map ;
36
37 import javax.xml.parsers.DocumentBuilder ;
38 import javax.xml.parsers.DocumentBuilderFactory ;
39 import javax.xml.parsers.ParserConfigurationException ;
40
41 import nextapp.echo2.app.DerivedMutableStyle;
42 import nextapp.echo2.app.MutableStyleSheet;
43 import nextapp.echo2.app.Style;
44 import nextapp.echo2.app.StyleSheet;
45 import nextapp.echo2.app.util.DomUtil;
46 import org.w3c.dom.Document ;
47 import org.w3c.dom.Element ;
48 import org.xml.sax.SAXException ;
49
50
53 public class StyleSheetLoader {
54
55
70 public static StyleSheet load(String resourceName, ClassLoader classLoader)
71 throws ComponentXmlException {
72 InputStream in = null;
73 try {
74 in = classLoader.getResourceAsStream(resourceName);
75 if (in == null) {
76 return null;
77 }
78 return load(in, classLoader);
79 } finally {
80 if (in != null) { try { in.close(); } catch (IOException ex) { } }
81 }
82 }
83
84
97 public static StyleSheet load(InputStream in, ClassLoader classLoader)
98 throws ComponentXmlException {
99 Document document;
100 try {
101 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
102 factory.setNamespaceAware(true);
103 DocumentBuilder builder = factory.newDocumentBuilder();
104 document = builder.parse(in);
105 } catch (IOException ex) {
106 throw new ComponentXmlException("Failed to parse InputStream.", ex);
107 } catch (ParserConfigurationException ex) {
108 throw new ComponentXmlException("Failed to parse InputStream.", ex);
109 } catch (SAXException ex) {
110 throw new ComponentXmlException("Failed to parse InputStream.", ex);
111 }
112
113 PropertyLoader propertyLoader = PropertyLoader.forClassLoader(classLoader);
114
115 Map namedStyleMap = new HashMap ();
116
117 MutableStyleSheet styleSheet = new MutableStyleSheet();
118 Element styleSheetElement = document.getDocumentElement();
119 Element [] styleElements = DomUtil.getChildElementsByTagName(styleSheetElement, "style");
120
121 for (int i = 0; i < styleElements.length; ++i) {
123 String name = styleElements[i].getAttribute("name");
124 if (!styleElements[i].hasAttribute("type")) {
125 throw new ComponentXmlException("Component type not specified in style: " + name, null);
126 }
127 String type = styleElements[i].getAttribute("type");
128
129 Class componentClass;
130 try {
131 componentClass = Class.forName(type, true, classLoader);
132 } catch (ClassNotFoundException ex) {
133 continue;
136 }
137
138 DerivedMutableStyle style = new DerivedMutableStyle();
139
140 Element propertiesElement = DomUtil.getChildElementByTagName(styleElements[i], "properties");
141 Style propertyStyle = propertyLoader.createStyle(propertiesElement, type);
142 style.addStyleContent(propertyStyle);
143
144 Map classToStyleMap = (Map ) namedStyleMap.get(name);
145 if (classToStyleMap == null) {
146 classToStyleMap = new HashMap ();
147 namedStyleMap.put(name, classToStyleMap);
148 }
149 classToStyleMap.put(componentClass, style);
150
151 styleSheet.addStyle(componentClass, name, style);
152 }
153
154 for (int i = 0; i < styleElements.length; ++i) {
156 if (styleElements[i].hasAttribute("base-name")) {
157 String name = styleElements[i].getAttribute("name");
158 String type = styleElements[i].getAttribute("type");
159 Class componentClass;
160 try {
161 componentClass = Class.forName(type, true, classLoader);
162 } catch (ClassNotFoundException ex) {
163 continue;
166 }
167
168 Map classToStyleMap = (Map ) namedStyleMap.get(name);
169 DerivedMutableStyle style = (DerivedMutableStyle) classToStyleMap.get(componentClass);
170
171 String baseName = styleElements[i].getAttribute("base-name");
172
173 classToStyleMap = (Map ) namedStyleMap.get(baseName);
174 if (classToStyleMap == null) {
175 throw new ComponentXmlException("Invalid base style name for style name " + name + ".", null);
176 }
177 Style baseStyle = (Style) classToStyleMap.get(componentClass);
178 while (baseStyle == null && componentClass != Object .class) {
179 componentClass = componentClass.getSuperclass();
180 baseStyle = (Style) classToStyleMap.get(componentClass);
181 }
182 if (baseStyle == null) {
183 throw new ComponentXmlException("Invalid base style name for style name " + name + ".", null);
184 }
185
186 style.setParentStyle(baseStyle);
187 }
188 }
189
190 return styleSheet;
191 }
192 }
193 |
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