Example usage for java.lang InstantiationException fillInStackTrace

Introduction

In this page you can find the example usage for java.lang InstantiationException fillInStackTrace.

Prototype

public synchronized Throwable fillInStackTrace() 

Source Link

Document

Fills in the execution stack trace.

Usage

From source file:com.ecyrd.jspwiki.plugin.PluginManager.java

/**
 *  Executes a plugin class in the given context.
 *  <P>Used to be private, but is public since 1.9.21.
 *
 *  @param context The current WikiContext.
 *  @param classname The name of the class.  Can also be a
 *  shortened version without the package name, since the class name is searched from the
 *  package search path./*from  ww w  .java2  s.c o m*/
 *
 *  @param params A parsed map of key-value pairs.
 *
 *  @return Whatever the plugin returns.
 *
 *  @throws PluginException If the plugin execution failed for
 *  some reason.
 *
 *  @since 2.0
 */
public String execute(WikiContext context, String classname, Map params) throws PluginException {
    if (!m_pluginsEnabled)
        return "";

    ResourceBundle rb = context.getBundle(WikiPlugin.CORE_PLUGINS_RESOURCEBUNDLE);
    Object[] args = { classname };
    try {
        WikiPlugin plugin;

        boolean debug = TextUtil.isPositive((String) params.get(PARAM_DEBUG));

        WikiPluginInfo pluginInfo = m_pluginClassMap.get(classname);

        if (pluginInfo == null) {
            pluginInfo = WikiPluginInfo.newInstance(findPluginClass(classname));
            registerPlugin(pluginInfo);
        }

        if (!checkCompatibility(pluginInfo)) {
            String msg = "Plugin '" + pluginInfo.getName() + "' not compatible with this version of JSPWiki";
            log.info(msg);
            return msg;
        }

        //
        //   Create...
        //
        try {
            plugin = pluginInfo.newPluginInstance();
        } catch (InstantiationException e) {
            throw new PluginException(
                    MessageFormat.format(rb.getString("plugin.error.cannotinstantiate"), args), e);
        } catch (IllegalAccessException e) {
            throw new PluginException(MessageFormat.format(rb.getString("plugin.error.notallowed"), args), e);
        } catch (Exception e) {
            throw new PluginException(
                    MessageFormat.format(rb.getString("plugin.error.instantationfailed"), args), e);
        }

        //
        //  ...and launch.
        //
        try {
            return plugin.execute(context, params);
        } catch (PluginException e) {
            if (debug) {
                return stackTrace(params, e);
            }

            // Just pass this exception onward.
            throw (PluginException) e.fillInStackTrace();
        } catch (Throwable t) {
            // But all others get captured here.
            log.info("Plugin failed while executing:", t);
            if (debug) {
                return stackTrace(params, t);
            }

            throw new PluginException(rb.getString("plugin.error.failed"), t);
        }

    } catch (ClassNotFoundException e) {
        throw new PluginException(MessageFormat.format(rb.getString("plugin.error.couldnotfind"), args), e);
    } catch (ClassCastException e) {
        throw new PluginException(MessageFormat.format(rb.getString("plugin.error.notawikiplugin"), args), e);
    }
}

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