private void init(ErrorDispatcher err) throws JasperException {
if (initialized) return;
InputStream is = ctxt.getResourceAsStream(TAG_PLUGINS_XML);
if (is == null) return;
TreeNode root = (new ParserUtils()).parseXMLDocument(TAG_PLUGINS_XML, is);
if (root == null) {
return;
}
if (!TAG_PLUGINS_ROOT_ELEM.equals(root.getName())) {
err.jspError("jsp.error.plugin.wrongRootElement", TAG_PLUGINS_XML, TAG_PLUGINS_ROOT_ELEM);
}
tagPlugins = new HashMap();
Iterator pluginList = root.findChildren("tag-plugin");
while (pluginList.hasNext()) {
TreeNode pluginNode = (TreeNode) pluginList.next();
TreeNode tagClassNode = pluginNode.findChild("tag-class");
if (tagClassNode == null) {
// Error
return;
}
String tagClass = tagClassNode.getBody().trim();
TreeNode pluginClassNode = pluginNode.findChild("plugin-class");
if (pluginClassNode == null) {
// Error
return;
}
String pluginClassStr = pluginClassNode.getBody();
TagPlugin tagPlugin = null;
try {
Class pluginClass = Class.forName(pluginClassStr);
tagPlugin = (TagPlugin) pluginClass.newInstance();
} catch (Exception e) {
throw new JasperException(e);
}
if (tagPlugin == null) {
return;
}
tagPlugins.put(tagClass, tagPlugin);
}
initialized = true;
}
