/** IMPORTANT: call this method after calling setIdGeneartor() */
public boolean loadPlugins(String[] classNames) throws ParserPluginLoadException {
String notLoadedNames = null;
if (classNames != null) {
for (String className : classNames) {
boolean exception = false;
try {
Class pluginClass = Class.forName(className);
ParserPlugin plugin = (ParserPlugin) pluginClass.newInstance();
plugin.setIdGenerator(getIdGenerator());
plugins.add(plugin);
} catch (ClassNotFoundException e) {
if (debugEnabled)
LoggerUtils.error("Failed to find Parser Plugin \"" + className + "\".");
exception = true;
} catch (InstantiationException e) {
if (debugEnabled)
LoggerUtils.error("Failed to instantiate Parser Plugin \"" + className + "\".");
exception = true;
} catch (IllegalAccessException e) {
if (debugEnabled)
LoggerUtils.error("Failed to access Parser Plugin \"" + className + "\".");
exception = true;
} catch (ClassCastException e) {
if (debugEnabled)
LoggerUtils.error(
"Failed to cast Parser Plugin \"" + className + "\" to ParserPlugin.");
exception = true;
}
if (exception)
if (notLoadedNames == null) notLoadedNames = className;
else notLoadedNames += ", " + className;
}
}
if (notLoadedNames != null) throw new ParserPluginLoadException(notLoadedNames);
return (plugins.size() > 0);
}
/** @author <a href="mailto:[email protected]">Huy A. Huynh</a> */ public class ParserPluginManager extends ParserPlugin { private static final boolean debugEnabled = LoggerUtils.isDebugEnabled(ParserPluginManager.class); private HashSet<ParserPlugin> plugins; public ParserPluginManager() { plugins = new HashSet<ParserPlugin>(); } /** IMPORTANT: call this method after calling setIdGeneartor() */ public boolean loadPlugins(String[] classNames) throws ParserPluginLoadException { String notLoadedNames = null; if (classNames != null) { for (String className : classNames) { boolean exception = false; try { Class pluginClass = Class.forName(className); ParserPlugin plugin = (ParserPlugin) pluginClass.newInstance(); plugin.setIdGenerator(getIdGenerator()); plugins.add(plugin); } catch (ClassNotFoundException e) { if (debugEnabled) LoggerUtils.error("Failed to find Parser Plugin \"" + className + "\"."); exception = true; } catch (InstantiationException e) { if (debugEnabled) LoggerUtils.error("Failed to instantiate Parser Plugin \"" + className + "\"."); exception = true; } catch (IllegalAccessException e) { if (debugEnabled) LoggerUtils.error("Failed to access Parser Plugin \"" + className + "\"."); exception = true; } catch (ClassCastException e) { if (debugEnabled) LoggerUtils.error( "Failed to cast Parser Plugin \"" + className + "\" to ParserPlugin."); exception = true; } if (exception) if (notLoadedNames == null) notLoadedNames = className; else notLoadedNames += ", " + className; } } if (notLoadedNames != null) throw new ParserPluginLoadException(notLoadedNames); return (plugins.size() > 0); } public Set<ParserPlugin> getLoadedPlugins() { return plugins; } public Set<Hit> parseHits(Parser htmlParser, String referringUrl) { if (plugins.size() == 0) return null; HashSet<Hit> resultSet = null; for (ParserPlugin plugin : plugins) { htmlParser.reset(); Set<Hit> parsed = plugin.parseHits(htmlParser, referringUrl); if (parsed != null) { if (resultSet == null) resultSet = new HashSet<Hit>(); resultSet.addAll(parsed); } } return resultSet; } }
